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K8AK / K8DS Series

Measuring & Monitoring Relays

K8AK / K8DS Series

DIN 22.5/17.5 Size Lineup of A Wide Range of Measuring and Monitoring Relays

K8AK-AS Single-phase Current Relay

Input Range

Model Range *1 Connection
terminal
Setting range Input
impedance
Input type Overload capacity
K8AK-AS1 0 to 20 mA
AC/DC
I1-COM 2 to 20 mA AC/DC,
10 to 100 mA AC/DC,
50 to 500 mA AC/DC
Approx. 5 Ω Direct input Continuous input at
120% of maximum
input 1 s at 150%
0 to 100 mA
AC/DC
I2-COM Approx. 1 Ω Direct input
0 to 500 mA
AC/DC
I3-COM Approx. 0.2 Ω Direct input
K8AK-AS2 0 to 1 A
AC/DC
I1-COM 0.1 to 1 A AC/DC,
0.5 to 5 A AC/DC,
0.8 to 8 A AC/DC
Approx. 0.12 Ω
(Load: 0.5 VA)
Direct input or
commercially
available CT
0 to 5 A
AC/DC
I2-COM Approx. 0.02 Ω
(Load: 1.5 VA)
0 to 8 A
AC/DC
I3-COM Approx. 0.02 Ω
(Load: 3 VA)
---
K8AK-AS3 0 to 100 A
AC
I2-COM 10 to 100 A AC *2,
20 to 200 A AC *2
--- OMRON CT Continuous input at
120% with an OMRON
CT (K8AC-CT200L).
30 s at 200%
1 s at 600%
* CT capacity on
primary side.
0 to 200 A
AC
I3-COM --- OMRON CT

*1 The range is selected using connected terminals.
*2 The K8AK-AS3 is designed to be used in combination with an OMRON K8AC-CT200L Current Transformer (CT).
      (Direct input is not possible.)

Ratings

Power supply
voltage
Isolated power supply 24 VAC/DC
100 to 240 VAC
Power consumption 24 VAC/DC: 2.0 VA/1.1 W max.
100 to 240 VAC: 4.6 VA max.
Operating value setting range (SV) 10% to 100% of the maximum value of the setting range
K8AK-AS1:
2 to 20 mA AC/DC
10 to 100 mA AC/DC
50 to 500 mA AC/DC
K8AK-AS2:
0.1 to 1 A AC/DC (Compatible with commercially available CTs.)
0.5 to 5 A AC/DC (Compatible with commercially available CTs.)
0.8 to 8 A AC/DC
K8AK-AS3:
When used with the OMRON CT (K8AC-CT200L).
10 to 100 A AC
20 to 200 A AC
Operating value 100% operation at set value
Reset value setting range (HYS.) 5% to 50% of operating value
Reset method Manual reset/automatic reset (switchable)
Note: Manual reset: Turn OFF power supply for 1 s or longer.
Operating time setting range (T) 0.1 to 30 s
Startup lock time setting range
(LOCK)
Note: Enabled only for overcurrent
operation.
0 to 30 s (The startup lock timer starts when the input has reached
approximately 30% or more of the set value.)
Note: Enabled only for overcurrent operation.
Indicators Power (PWR): Green, Relay output (RY): Yellow, Alarm outputs (ALM): Red
Input impedance Refer to Input Range on this page.
Output relays One SPDT relay (NO/NC switched using DIP switch.)
Output relay ratings Rated load
Resistive load
5 A at 250 VAC
5 A at 30 VDC
Maximum contact voltage: 250 VAC or 30 VDC
Max. switching current: 5 A
Maximum switching capacity: 1,250 VA, 150 W
Mechanical life: 10 million operations min.
Electrical life:
5 A at 250 VAC or 30 VDC: 50,000 operations
3 A at 250 VAC/30 VDC:100,000 operations
Ambient operating temperature -20 to 60°C (with no condensation or icing)
Storage temperature -25 to 65°C (with no condensation or icing)
Ambient operating humidity 25% to 85% (with no condensation)
Storage humidity 25% to 85% (with no condensation)
Altitude 2,000 m max.
Terminal screw tightening torque 0.49 N·m
Terminal wiring method Recommended wire
Solid wire: 2.5 mm2
Twisted wires: AWG16, AWG18
Note:
1. Ferrules with insulating sleeves must be used with twisted wires.
2. Two wires can be twisted together.
Recommended ferrules
Al 1,5-8BK (for AWG16) manufactured by Phoenix Contact
Al 1-8RD (for AWG18) manufactured by Phoenix Contact
Al 0,75-8GY (for AWG18) manufactured by Phoenix Contact
Case color N1.5
Case material PC and ABS
Weight Approx. 150 g
Mounting Mounts to DIN Track
Dimensions 22.5 × 90 × 100 mm (W × H × D)

Specifications

Allowable operating voltage
range
85% to 110% of power supply voltage
Allowable operating
frequency range
50/60 Hz ±5 Hz
Input frequency range K8AK-AS1 and K8AK-AS2: DC input or AC input (45 to 65 Hz)
K8AK-AS3: AC input (45 to 65 Hz)
Overload capacity K8AK-AS1 and K8AK-AS2: Continuous input at 120% of maximum input, 1 s at 150%
K8AK-AS3: Continuous input at 120%, 30 s at 200%, and 1 s at 600% with an OMRON
CT (K8AC-CT200L)
Note: Overload capacity of primary side of CT.
Repeat
error
Operating value ±0.5% full scale (at 25°C and 65% humidity, rated power supply voltage, DC or 50/60
Hz sine wave input)
Operating time ±50 ms (at 25°C and 65% humidity, rated power supply voltage)
Applicable
standards
Conforming
standards
EN60947-5-1
Installation environment (pollution level 2, installation category III)
EMC EN60947-5-1
Safety standards UL 508 (Recognition), Korean Radio Waves Act (Act 10564),
CSA: CAN/CSA C22.2 No.14,CCC: GB14048.5
Insulation resistance 20 MΩ min.
Between external terminals and case
Between power supply terminals and input terminals
Between power supply terminals and output terminals
Between input terminals and output terminals
Dielectric strength 2,000 VAC for one minute
Between external terminals and case
Between power supply terminals and input terminals
Between power supply terminals and output terminals
Between input terminals and output terminals
Noise immunity 1,500 V power supply terminal common/normal mode
Square-wave noise of ±1 μs/100 ns pulse width with 1-ns rise time
Vibration resistance Frequency 10 to 55 Hz, 0.35-mm single amplitude, acceleration 50 m/s2
10 sweeps of 5 min each in X, Y, and Z directions
Shock resistance 150 m/s2, 3 times each in 6 directions along 3 axes
Or 100 m/s2 for relay contacts.
Degree of protection Terminals: IP20

Relationship of Mounting Distance between K8AK-AS Relays and Input Current (Reference Values)

The following diagram shows the relationship between the mounting distances and the input current. If the relay is used with an input current that exceeds these values, the temperature of the K8AK may rise and shorten the life of the internal components.

K8AK / K8DS Series Specifications 6

K8AK-AW Single-phase Overcurrent/Undercurrent Relays

Input Range

Model Range *1 Connection
terminals
Setting range Input
impedance
Input type Overload capacity
K8AK-AW1 0 to 20 mA
AC/DC
I1-COM 2 to 20 mA AC/DC
10 to 100 mA AC/DC
50 to 500 mA AC/DC
Approx. 5 Ω Direct input Continuous input at
120% of maximum
input.
1 s at 150%
0 to 100 mA
AC/DC
I2-COM Approx. 1 Ω Direct input
0 to 500 mA
AC/DC
I3-COM Approx. 0.2 Ω Direct input
K8AK-AW2 0 to 1 A
AC/DC
I1-COM 0.1 to 1 A AC/DC
0.5 to 5 A AC/DC
Approx. 0.12 Ω
(Load: 0.5 VA)
Direct input or
commercially
available CT
0 to 5 A
AC/DC
I2-COM Approx. 0.02 Ω
(Load: 1.5 VA)
K8AK-AW3 0 to 100 A
AC
I2-COM 10 to 100 A AC *2
20 to 200 A AC *2
--- OMRON CT Continuous input at
120% with an OMRON
CT (K8AC-CT200L).
30 s at 200%
1 s at 600%
* CT capacity on
primary side.
0 to 200 A
AC
I3-COM --- OMRON CT

*1 The range is selected using connected terminals.
*2 The K8AK-AW3 is designed to be used in combination with an OMRON K8AC-CT200L Current Transformer (CT).
      (Direct input is not possible.)

Ratings

Power supply
voltage
Isolated power supply 24 VAC/DC
100 to 240 VAC
Power consumption 24 VAC/DC: 2.0 VA/1.1 W max.
100 to 240 VAC: 4.6 VA max.
Operating value setting range (SV) 10% to 100% of the maximum value of the setting range
K8AK-AW1:
2 to 20 mA AC/DC
10 to 100 mA AC/DC
50 to 500 mA AC/DC
K8AK-AW2:
0.1 to 1 A AC/DC (Compatible with commercially available CTs.)
0.5 to 5 A AC/DC (Compatible with commercially available CTs.)
K8AK-AW3:
When used with the OMRON CT (K8AC-CT200L).
10 to 100 A AC
20 to 200 A AC
Operating value 100% operation at set value
Reset value 5% of operating value (fixed)
Reset method Manual reset/automatic reset (switchable)
Note: Manual reset: Turn OFF power supply for 1 s or longer.
Operating time setting range (T) 0.1 to 30 s
Startup lock time setting range
(LOCK)
Note: Enabled only for overcurrent
operation.
0 to 30 s (The startup lock timer starts when the input has reached
approximately 30% or more of the set value.)
Note: Enabled only for overcurrent operation.
Indicators Power (PWR): Green, Relay output (RY): Yellow, Alarm outputs (ALM): Red
Input impedance Refer to Input Range on previous page.
Output relays Two SPDT relay outputs (normally closed operation)
Output relay ratings Rated load
Resistive load
5 A at 250 VAC
5 A at 30 VDC
Maximum contact voltage: 250 VAC or 30 VDC
Max. switching current: 5 A
Maximum switching capacity: 1,250 VA, 150 W
Mechanical life: 10 million operations min.
Electrical life:
5 A at 250 VAC or 30 VDC: 50,000 operations
3 A at 250 VAC/30 VDC: 100,000 operations
Ambient operating temperature -20 to 60°C (with no condensation or icing)
Storage temperature -25 to 65°C (with no condensation or icing)
Ambient operating humidity 25% to 85% (with no condensation)
Storage humidity 25% to 85% (with no condensation)
Altitude 2,000 m max.
Terminal screw tightening torque 0.49 N·m
Terminal wiring method Recommended wire
Solid wire: 2.5 mm2
Twisted wires: AWG16, AWG18
Note:
1. Ferrules with insulating sleeves must be used with twisted wires.
2. Two wires can be twisted together.
Recommended ferrules
Al 1,5-8BK (for AWG16) manufactured by Phoenix Contact
Al 1-8RD (for AWG18) manufactured by Phoenix Contact
Al 0,75-8GY (for AWG18) manufactured by Phoenix Contact
Case color N1.5
Case material PC and ABS
Weight Approx. 150 g
Mounting Mounts to DIN Track.
Dimensions 22.5 × 90 × 100 mm (W × H × D)

Specifications

Allowable operating voltage
range
85% to 110% of power supply voltage
Allowable operating
frequency range
50/60 Hz ±5 Hz
Input frequency range K8AK-AW1 and K8AK-AW2: DC input or AC input (45 to 65 Hz)
K8AK-AW3: AC input (45 to 65 Hz)
Overload capacity K8AK-AW1 and K8AK-AW2: Continuous input at 120% of maximum input, 1 s at 150%
K8AK-AW3: Continuous input at 120%, 30 s at 200%, and 1 s at 600% with an OMRON
CT (K8AC-CT200L).
Note: CT capacity on primary side.
Repeat
accuracy
Operating value ±0.5% full scale (at 25°C and 65% humidity, rated power supply voltage, DC or 50/60
Hz sine wave input)
Operating time ±50 ms (at 25°C and 65% humidity, rated power supply voltage)
Applicable
standards
Conforming
standards
EN60947-5-1
Installation environment (pollution level 2, installation category III)
EMC EN60947-5-1
Safety standards UL 508 (Recognition), Korean Radio Waves Act (Act 10564),
CSA: CAN/CSA C22.2 No.14,CCC: GB14048.5
Insulation resistance 20 MΩ min.
Between external terminals and case
Between power supply terminals and input terminals
Between power supply terminals and output terminals
Between input terminals and output terminals
Dielectric strength 2,000 VAC for one minute
Between external terminals and case
Between power supply terminals and input terminals
Between power supply terminals and output terminals
Between input terminals and output terminals
Noise immunity 1,500 V power supply terminal common/normal mode
Square-wave noise of ±1 μs/100 ns pulse width with 1-ns rise time
Vibration resistance Frequency: 10 to 55 Hz, acceleration 50 m/s2
10 sweeps of 5 min each in X,Y, and Z directions
Shock resistance 150 m/s2, 3 times each in 6 directions along 3 axes
Or 100 m/s2 for relay contacts.
Degree of protection Terminals: IP20

Relationship of Mounting Distance between K8AK-AW Relays and Input Current (Reference Values)

The following diagram shows the relationship between the mounting distances and the input current.
If the relay is used with an input current that exceeds these values, the temperature of the K8AK may rise and shorten the life of the internal components.

K8AK / K8DS Series Specifications 12

K8AK-VS Single-phase Voltage Relay

Input Range

Model Range * Connection
terminal
Setting range Input
impedance
Overload capacity
K8AK-VS2 0 to 10 V AC/DC V1-COM 1 to 10 V AC/DC,
3 to 30 V AC/DC,
15 to 150 V AC/DC
Approx. 120 kΩ Continuous input at 115%
of maximum input 10 s at
125%
(up to 600 VAC)
0 to 30 V AC/DC V2-COM Approx. 320 kΩ
0 to 150 V AC/DC V3-COM Approx. 1.6 MΩ
K8AK-VS3 0 to 200 V AC/DC V1-COM 20 to 200 V AC/DC,
30 to 300 V AC/DC,
60 to 600 V AC/DC
Approx. 1.2 MΩ
0 to 300 V AC/DC V2-COM Approx. 1.7 MΩ
0 to 600 V AC/DC V3-COM Approx. 3.1 MΩ

* The range is selected using connected terminals.

Ratings

Power supply
voltage
Isolated power supply 24 VAC/DC
100 to 240 VAC
Power consumption 24 VAC/DC: 2.0 VA/1.1 W max.
100 to 240 VAC: 4.6 VA max.
Operating value setting range (SV) 10% to 100% of maximum setting range
K8AK-VS2:
1 to 10 V AC/DC
3 to 30 V AC/DC
15 to 150 V AC/DC
K8AK-VS3:
20 to 200 V AC/DC
30 to 300 V AC/DC
60 to 600 V AC/DC
Operating value 100% operation at set value
Reset value setting range (HYS.) 5% to 50% of operating value
Reset method Manual reset/automatic reset (switchable)
Note: Manual reset: Turn OFF power supply for 1 s or longer.
Operating time setting range (T) 0.1 to 30 s
Power ON lock time (LOCK) 1 s or 5 s (Switched using DIP switch.)
Indicators Power (PWR): Green, Relay output (RY): Yellow, Alarm outputs (ALM): Red
Input impedance Refer to Input Range on previous page.
Output relays One SPDT relay (NO/NC switched using DIP switch.)
Output relay ratings Rated load
Resistive load
5 A at 250 VAC
5 A at 30 VDC
Maximum contact voltage: 250 VAC or 30 VDC
Max. switching current: 5 A
Maximum switching capacity: 1,250 VA, 150 W
Mechanical life: 10 million operations min.
Electrical life:
5 A at 250 VAC or 30 VDC: 50,000 operations
3 A at 250 VAC or 30 VDC: 100,000 operations
Ambient operating temperature -20 to 60°C (with no condensation or icing)
Storage temperature -25 to 65°C (with no condensation or icing)
Ambient operating humidity 25% to 85% (with no condensation)
Storage humidity 25% to 85% (with no condensation)
Altitude 2,000 m max.
Terminal screw tightening torque 0.49 N·m
Terminal wiring method Recommended wire
Solid wire: 2.5 mm2
Twisted wires: AWG16, AWG18
Note:
1. Ferrules with insulating sleeves must be used with twisted wires.
2. Two wires can be twisted together.
Recommended ferrules
Al 1,5-8BK (for AWG16) manufactured by Phoenix Contact
Al 1-8RD (for AWG18) manufactured by Phoenix Contact
Al 0,75-8GY (for AWG18) manufactured by Phoenix Contact
Case color N1.5
Case material PC and ABS
Weight Approx. 150 g
Mounting Mounts to DIN Track.
Dimensions 22.5 × 90 × 100 mm (W × H × D)

Specifications

Allowable operating voltage range 85% to 110% of rated power supply voltage
Allowable operating frequency range 50/60 Hz ±5 Hz
Input frequency 40 to 500 Hz
Overload capacity Continuous input at 115% of maximum input, 10 s at 125% (up to 600 VAC).
Repeat
accuracy
Operating value ±0.5% full scale (at 25°C and 65% humidity, rated power supply voltage, DC
or 50/60 Hz sine wave input)
Operating time ±50 ms (at 25°C and 65% humidity, rated power supply voltage)
Applicable
standards
Conforming standards EN60947-5-1
Installation environment (pollution level 2, installation category III)
EMC EN60947-5-1
Safety standards UL 508 (Recognition), Korean Radio Waves Act (Act 10564),
CSA: CAN/CSA C22.2 No.14, CCC: GB14048.5
Insulation resistance 20 MΩ min.
Between external terminals and case
Between power supply terminals and input terminals
Between power supply terminals and output terminals
Between input terminals and output terminals
Dielectric strength 2,000 VAC for one minute
Between external terminals and case
Between power supply terminals and input terminals
Between power supply terminals and output terminals
Between input terminals and output terminals
Noise immunity 1,500 V power supply terminal common/normal mode
Square-wave noise of ±1 μs/100 ns pulse width with 1-ns rise time
Vibration resistance Frequency: 10 to 55 Hz, acceleration 50 m/s2
10 sweeps of 5 min each in X,Y, and Z directions
Shock resistance 150 m/s2 3 times each in 6 directions along 3 axes.
Or 100 m/s2 for relay contacts.
Degree of protection Terminals: IP20

K8AK-VW Single-phase Overvoltage/Undervoltage Relays

Input Range

Model Range * Connection
terminal
Setting range Input
impedance
Overload capacity
K8AK-VW2 0 to 10 V AC/DC V1-COM 1 to 10 V AC/DC
3 to 30 V AC/DC
15 to 150 V AC/DC
Approx. 120 kΩ Continuous input at 115% of
maximum input.
10 s at 125%
(up to 600 VAC)
0 to 30 V AC/DC V2-COM Approx. 320 kΩ
0 to 150 V AC/DC V3-COM Approx. 1.6 MΩ
K8AK-VW3 0 to 200 V AC/DC V1-COM 20 to 200 V AC/DC
30 to 300 V AC/DC
60 to 600 V AC/DC
Approx. 1.2 MΩ
0 to 300 V AC/DC V2-COM Approx. 1.7 MΩ
0 to 600 V AC/DC V3-COM Approx. 3.1 MΩ

* The range is selected using connected terminals.

Ratings

Power supply
voltage
Isolated power supply 24 VAC/DC
100 to 240 VAC
Power consumption 24 VAC/DC: 2.0 VA/1.1 W max.
100 to 240 VAC: 4.6 VA max.
Operating value setting range
(AL1 and AL2)
10% to 100% of the maximum value of the setting range
K8AK-VW2:
1 to 10 V AC/DC
3 to 30 V AC/DC
15 to 150 V AC/DC
K8AK-VW3:
20 to 200 V AC/DC
30 to 300 V AC/DC
60 to 600 V AC/DC
Operating value 100% operation at set value
Reset value 5% of operating value (fixed)
Reset method Manual reset/automatic reset (switchable)
Note: Manual reset: Turn OFF power supply for 1 s or longer.
Operating time setting range (T) 0.1 to 30 s
Power ON lock time (LOCK) 1 s or 5 s (Switched using DIP switch.)
Indicators Power (PWR): Green, Relay output (RY): Yellow, Alarm outputs (AL1, AL2): Red
Input impedance Refer to Input Range on previous page.
Output relays Two SPDT relays (NC operation)
Output relay ratings Rated load
Resistive load
5 A at 250 VAC
5 A at 30 VDC
Maximum contact voltage: 250 VAC or 30 VDC
Max. switching current: 5 A
Maximum switching capacity: 1,250 VA, 150 W
Mechanical life: 10 million operations min.
Electrical life:
5 A at 250 VAC or 30 VDC: 50,000 operations
3 A at 250 VAC or 30 VDC: 100,000 operations
Ambient operating temperature -20 to 60°C (with no condensation or icing)
Storage temperature -25 to 65°C (with no condensation or icing)
Ambient operating humidity 25% to 85% (with no condensation)
Storage humidity 25% to 85% (with no condensation)
Altitude 2,000 m max.
Terminal screw tightening torque 0.49 N·m
Terminal wiring method Solid wire: 2.5 mm2
Twisted wires: AWG16, AWG18
Note:
1. Ferrules with insulating sleeves must be used with twisted wires.
2. Two wires can be twisted together.
Recommended ferrules
Al 1,5-8BK (for AWG16) manufactured by Phoenix Contact
Al 1-8RD (for AWG18) manufactured by Phoenix Contact
Al 0,75-8GY (for AWG18) manufactured by Phoenix Contact
Case color N1.5
Case material PC and ABS
Weight Approx. 150 g
Mounting Mounts to DIN Track.
Dimensions 22.5 × 90 × 100 mm (W × H × D)

Specifications

Allowable operating voltage range 85% to 110% of rated power supply voltage
Allowable operating frequency range 50/60 Hz ±5 Hz
Input frequency range 40 to 500 Hz
Overload capacity Continuous input at 115% of maximum input, 10 s at 125% (up to 600 VAC).
Repeat error Operating value ±0.5% full scale (at 25°C and an ambient humidity of 65% at the rated
power supply voltage, DC and 50/60 Hz sine wave input)
Operating time ±50 ms (at 25°C and 65% humidity, rated power supply voltage)
Applicable
standards
Conforming standards EN60947-5-1
Installation environment (pollution level 2, installation category III)
EMC EN60947-5-1
Safety standards UL 508 (Recognition), Korean Radio Waves Act (Act 10564),
CSA: CAN/CSA C22.2 No.14, CCC: GB14048.5
Insulation resistance 20 MΩ min.
Between all external terminals and the case
Between all power supply terminals and all input terminals
Between all power supply terminals and all output terminals
Between all input terminals and all output terminals
Dielectric strength 2,000 VAC for 1 min
Between all external terminals and the case
Between all power supply terminals and all input terminals
Between all power supply terminals and all output terminals
Between all input terminals and all output terminals
Noise immunity 1,500 V power supply terminal common/normal mode
Square-wave noise of ±1 μs/100 ns pulse width with 1-ns rise time
Vibration resistance Frequency: 10 to 55 Hz, acceleration 50 m/s2
10 sweeps of 5 min each in X,Y, and Z directions
Shock resistance 150 m/s2 3 times each in 6 directions along 3 axes.
Or 100 m/s2 for relay contacts.
Degree of protection Terminals: IP20

K8DS-PH Phase-sequence Phase-loss Relay

Ratings

Rated input voltage 3-phase, 200 to 480 VAC (3-wire)
Input load Approx. 2.7 VA
Reversed phase and phase loss operating time 0.1 s max.
Reset method Automatic reset
Indicators Power (PWR): Green, Relay output (RY): Yellow
Output relays One SPDT relay (NC operation)
Output relay ratings Rated load
Resistive load
5 A at 250 VAC
5 A at 30 VDC
Max. switching voltage
250 VAC or 30 VDC
Max. switching current: 5 A
Maximum switching capacity: 1,250 VA, 150 W
Mechanical life: 10 million operations min.
Electrical life:
5 A at 250 VAC or 30 VDC:50,000 operations
3 A at 250 VAC/30 VDC:100,000 operations
Ambient operating temperature -20 to 60°C (with no condensation or icing)
Storage temperature -25 to 65°C (with no condensation or icing)
Ambient operating humidity 25% to 85% (with no condensation)
Storage humidity 25% to 85% (with no condensation)
Altitude 2,000 m max.
Terminal screw tightening torque 0.49 N·m
Terminal wiring method Recommended wire
Solid wire: 2.5 mm2
Twisted wires: AWG16, AWG18
Note:
1. Ferrules with insulating sleeves must be used with twisted wires.
2. Two wires can be twisted together.
Recommended ferrules
Al 1,5-8BK (for AWG16) manufactured by Phoenix Contact
Al 1-8RD (for AWG18) manufactured by Phoenix Contact
Al 0,75-8GY (for AWG18) manufactured by Phoenix Contact
Case color N1.5
Case material PC and ABS
Weight Approx. 60 g
Mounting Mounts to DIN Track.
Dimensions 17.5 × 80 × 73 mm (W × D × H)

Specifications

Input voltage range 200 to 480 VAC
Input frequency 50/60 Hz (no presumed range)
Overload capacity Continuous 500 V
Applicable
standards
Conforming standards EN60947-5-1
Installation environment (pollution level 2, installation category III)
EMC EN60947-5-1
Safety standards UL 508 (Recognition), Korean Radio Waves Act (Act 10564),
CSA: CAN/CSA C22.2 No.14, CCC: GB14048.5
Insulation resistance 20 MΩ min.
Between external terminals and case
Between input terminals and output terminals
Dielectric strength 2,000 VAC for one minute
Between external terminals and case
Between input terminals and output terminals
Noise immunity 1,500 V power supply terminal common/normal mode
Square-wave noise of ±1 μs/100 ns pulse width with 1-ns rise time
Vibration resistance Frequency: 10 to 55 Hz, acceleration 50 m/s2
10 sweeps of 5 min each in X,Y, and Z directions
Shock resistance 150 m/s2, 3 times each in 6 directions along 3 axes
However, 100 m/s2 for relay contacts.
Degree of protection Terminals: IP20

Relationship of Mounting Distance between K8DS-PH Relays and Ambient Temperature (Reference Values)

The following diagram shows the relationship between the mounting distances and the ambient temperature.
If the relay is used with an ambient temperature that exceeds these values, the temperature of the K8DS may rise and shorten the life of the internal components.

K8AK / K8DS Series Specifications 26

K8AK-PH Phase-sequence Phase-loss Relay

Ratings

Rated input voltage 3-phase, 200 to 480 VAC (3-wire)
Input load Approx. 4.1 VA
Reversed phase and phase loss operating time 0.1 s max.
Reset method Automatic reset
Indicators Power (PWR): Green, Relay output (RY): Yellow
Output relays One DPDT relay (NC operation)
Output relay ratings Rated load
Resistive load
5 A at 250 VAC
5 A at 30 VDC
Max. switching voltage
250 VAC or 30 VDC
Max. switching current: 5 A
Minimum load: 24 VDC, 40 mA
Mechanical life: 10 million operations min.
Electrical life:
5 A at 250 VAC or 30 VDC: 50,000 operations
3 A at 250 VAC/30 VDC:100,000 operations
Ambient operating temperature -20 to 60°C (with no condensation or icing)
Storage temperature -25 to 65°C (with no condensation or icing)
Ambient operating humidity 25% to 85% (with no condensation)
Storage humidity 25% to 85% (with no condensation)
Altitude 2,000 m max.
Terminal screw tightening torque 0.49 N·m
Terminal wiring method Recommended wire
Solid wire: 2.5 mm2
Twisted wires: AWG16, AWG18
Note:
1. Ferrules with insulating sleeves must be used with twisted wires.
2. Two wires can be twisted together.
Recommended ferrules
Al 1,5-8BK (for AWG16) manufactured by Phoenix Contact
Al 1-8RD (for AWG18) manufactured by Phoenix Contact
Al 0,75-8GY (for AWG18) manufactured by Phoenix Contact
Case color N1.5
Case material PC and ABS
Weight Approx. 130 g
Mounting Mounts to DIN Track.
Dimensions 22.5 × 90 × 100 mm (W × H × D)

Specifications

Input voltage range 200 to 480 VAC
Input frequency 50/60 Hz (no presumed range)
Overload capacity Continuous 528 V
Applicable
standards
Conforming standards EN60947-5-1
Installation environment (pollution level 2, installation category III)
EMC EN60947-5-1
Safety standards UL 508 (Recognition), Korean Radio Waves Act (Act 10564),
CSA: CAN/CSA C22.2 No.14, CCC: GB14048.5
Insulation resistance 20 MΩ min.
Between external terminals and case
Between input terminals and output terminals
Dielectric strength 2,000 VAC for one minute
Between external terminals and case
Between input terminals and output terminals
Noise immunity 1,500 V power supply terminal common/normal mode
Square-wave noise of ±1 μs/100 ns pulse width with 1-ns rise time
Vibration resistance Frequency: 10 to 55 Hz, acceleration 50 m/s2
10 sweeps of 5 min each in X,Y, and Z directions
Shock resistance 150 m/s2, 3 times each in 6 directions along 3 axes
However, 100 m/s2 for relay contacts.
Degree of protection Terminals: IP20

Relationship of Mounting Distance between K8AK-PH Relays and Ambient Temperature (Reference Values)

The following diagram shows the relationship between the mounting distances and the ambient temperature.
If the relay is used with an ambient temperature that exceeds these values, the temperature of the K8AK may rise and shorten the life of the internal components.

K8AK / K8DS Series Specifications 30

K8AK-PW Three-phase Voltage Relay

Ratings

Rated input voltage K8AK-PW1 Three-phase, three-wire Mode: 200, 220, 230 and 240 VAC
Three-phase, four-wire Mode: 115, 127, 133 and 138 VAC
K8AK-PW2 Three-phase, three-wire Mode: 380, 400, 415 and 480 VAC
Three-phase, four-wire Mode: 220, 230, 240 and 277 VAC
Input load K8AK-PW1: Approx. 4.4 VA
K8AK-PW2: Approx. 4.4 VA
Operating value setting range (OVER, UNDER) Overvoltage
-30% to 25% of rated input voltage
Undervoltage
-30% to 25% of rated input voltage
Note: The rated input voltage can be switched using the DIP switch.
Operating value 100% operation at set value
Reset value 5% of operating value (fixed)
Reset method Automatic reset
Operating time setting range (T) Overvoltage and undervoltage: 0.1 to 30 s
Startup lock time (LOCK) 1 s/5 s (Changed with the DIP switch.)
Indicators Power (PWR): Green, Relay output (RY): Yellow, OVER/UNDER: Red
Output relays Two SPDT relays (NC operation)
Output relay ratings Rated load
Resistive load
5 A at 250 VAC
5 A at 30 VDC
Maximum contact voltage: 250 VAC or 30 VDC
Max. switching current: 5 A
Maximum switching capacity: 1,250 VA, 150 W
Mechanical life: 10 million operations min.
Electrical life:
5 A at 250 VAC or 30 VDC:50,000 operations
3 A at 250 VAC/30 VDC:100,000 operations
Ambient operating temperature -20 to 60°C (with no condensation or icing)
Storage temperature -25 to 65°C (with no condensation or icing)
Ambient operating humidity 25% to 85% (with no condensation)
Storage humidity 25% to 85% (with no condensation)
Altitude 2,000 m max.
Terminal screw tightening torque 0.49 N·m
Terminal wiring method Recommended wire
Solid wire: 2.5 mm2
Twisted wires: AWG16, AWG18
Note:
1. Ferrules with insulating sleeves must be used with twisted wires.
2. Two wires can be twisted together.
Recommended ferrules
Al 1,5-8BK (for AWG16) manufactured by Phoenix Contact
Al 1-8RD (for AWG18) manufactured by Phoenix Contact
Al 0,75-8GY (for AWG18) manufactured by Phoenix Contact
Case color N1.5
Case material PC and ABS
Weight Approx. 150 g
Mounting Mounts to DIN Track.
Dimensions 22.5 × 90 × 100 mm (W × H × D)

Specifications

Input frequency range 50/60 Hz
Overload capacity Continuous input at 115% of maximum input. 10 s at 125%. (up to 600 VAC)
Repeat
accuracy
Operating value ±0.5% full scale (at 25°C and an ambient humidity of 65% at the rated power
supply voltage, DC and 50/60 Hz sine wave input)
Operating time ±50 ms (at 25°C and 65% humidity, rated power supply voltage)
Applicable
standards
Conforming standards EN60947-5-1
Installation environment (pollution level 2, installation category III)
EMC EN60947-5-1
Safety standards UL 508 (Recognition), Korean Radio Waves Act (Act 10564),
CSA: CAN/CSA C22.2 No.14, CCC: GB14048.5
Insulation resistance 20 MΩ
Between all external terminals and the case
Between all input terminals and all output terminals
Dielectric strength 2,000 VAC for 1 min
Between all external terminals and the case
Between all input terminals and all output terminals
Noise immunity 1,500 V power supply terminal common/normal mode
Square-wave noise of ±1 μs/100 ns pulse width with 1-ns rise time
Vibration resistance Frequency: 10 to 55 Hz, acceleration 50 m/s2
10 sweeps of 5 min each in X,Y, and Z directions
Shock resistance 150 m/s2, 3 times each in 6 directions along 3 axes
However, 100 m/s2 for relay contacts.
Degree of protection Terminals: IP20

Relationship of Mounting Distance between K8AK-PW Relays and Ambient Temperature (Reference Values)

The following diagram shows the relationship between the mounting distances and the ambient temperature.
If the relay is used with an ambient temperature that exceeds these values, the temperature of the K8AK may rise and shorten the life of the internal components.

K8AK / K8DS Series Specifications 34

K8AK-PM Three-phase Phase-sequence Phase-loss Relay

Ratings

Rated input
voltage
K8AK-PM1 Three-phase, three-wire Mode: 200, 220, 230 and 240 VAC
Three-phase, four-wire Mode: 115, 127, 133 and 138 VAC
K8AK-PM2 Three-phase, three-wire Mode: 380, 400, 415 and 480 VAC
Three-phase, four-wire Mode: 220, 230, 240 and 277 VAC
Input load K8AK-PM1: Approx. 4.4 VA
K8AK-PM2: Approx. 4.4 VA
Operating value setting range (OVER, UNDER) Overvoltage
-30% to 25% of rated input voltage
Undervoltage
-30% to 25% of rated input voltage
Note: The rated input voltage can be switched using the DIP switch.
Operating value 100% operation at set value
Reset value 5% of operating value (fixed)
Reset method Automatic reset
Operating time
setting range (T)
Overvoltage/undervoltage 0.1 to 30 s
Reversed phase/phase loss 0.1 s
Startup lock time (LOCK) 1 s or 5 s (Switched using DIP switch.)
Indicators Power (PWR): Green, Relay output (RY): Yellow, OVER/UNDER: Red
Output relays Two SPDT relays (NC operation)
Output relay ratings Rated load
Resistive load
5 A at 250 VAC
5 A at 30 VDC
Maximum contact voltage: 250 VAC or 30 VDC
Max. switching current: 5 A
Maximum switching capacity: 1,250 VA, 150 W
Mechanical life: 10 million operations min.
Electrical life:
5 A at 250 VAC or 30 VDC: 50,000 operations
3 A at 250 VAC/30 VDC: 100,000 operations
Ambient operating temperature -20 to 60°C (with no condensation or icing)
Storage temperature -25 to 65°C (with no condensation or icing)
Ambient operating humidity 25% to 85% (with no condensation)
Storage humidity 25% to 85% (with no condensation)
Altitude 2,000 m max.
Terminal screw tightening torque 0.49 N·m
Terminal wiring method Recommended wire
Solid wire: 2.5 mm2
Twisted wires: AWG16, AWG18
Note:
1. Ferrules with insulating sleeves must be used with twisted wires.
2. Two wires can be twisted together.
Recommended ferrules
Al 1,5-8BK (for AWG16) manufactured by Phoenix Contact
Al 1-8RD (for AWG18) manufactured by Phoenix Contact
Al 0,75-8GY (for AWG18) manufactured by Phoenix Contact
Case color N1.5
Case material PC and ABS
Weight Approx. 150 g
Mounting Mounts to DIN Track.
Dimensions 22.5 × 90 × 100 mm (W × H × D)

Specifications

Input frequency 50/60 Hz
Overload capacity Continuous input at 115% of maximum input, 10 s at 125% (up to 600 VAC).
Repeat
accuracy
Operating value ±0.5% full scale (at 25°C and an ambient humidity of 65% at the rated power
supply voltage, DC and 50/60 Hz sine wave input)
Operating time ±50 ms (at 25°C and 65% humidity, rated power supply voltage)
Applicable
standards
Conforming standards EN60947-5-1
Installation environment (pollution level 2, installation category III)
EMC EN60947-5-1
Safety standards UL 508 (Recognition), Korean Radio Waves Act (Act 10564),
CSA: CAN/CSA C22.2 No.14, CCC: GB14048.5
Insulation resistance 20 MΩ
Between all external terminals and the case
Between all input terminals and all output terminals
Dielectric strength 2,000 VAC for 1 min
Between all external terminals and the case
Between all input terminals and all output terminals
Noise immunity 1,500 V power supply terminal common/normal mode
Square-wave noise of ±1 μs/100 ns pulse width with 1-ns rise time
Vibration resistance Frequency: 10 to 55 Hz, acceleration 50 m/s2
10 sweeps of 5 min each in X,Y, and Z directions
Shock resistance 150 m/s2, 3 times each in 6 directions along 3 axes
However, 100 m/s2 for relay contacts.
Degree of protection Terminals: IP20

Relationship of Mounting Distance between K8AK-PM Relays and Ambient Temperature (Reference Values)

The following diagram shows the relationship between the mounting distances and the ambient temperature.
If the relay is used with an ambient temperature that exceeds these values, the temperature of the K8AK may rise and shorten the life of the internal components.

K8AK / K8DS Series Specifications 38

K8AK-PA Three-phase Asymmetry and Phase-sequence Phase-loss Relay

Ratings

Rated input
voltage
K8AK-PA1 Three-phase, three-wire Mode: 200, 220, 230 and 240 VAC
Three-phase, four-wire Mode: 115, 127, 133 and 138 VAC
K8AK-PA2 Three-phase, three-wire Mode: 380, 400, 415 and 480 VAC
Three-phase, four-wire Mode: 220, 230, 240 and 277 VAC
Input load K8AK-PA1: Approx. 4.4 VA
K8AK-PA2: Approx. 4.4 VA
Operating value setting range (ASY.) Asymmetry set value: 2% to 22%
Operating value Asymmetry operating value = Rated input voltage × Asymmetry set value (%)
The asymmetry operation will function when the potential difference between
the highest and lowest voltage phases equals or exceeds the asymmetry operating value.
Reset value setting range (HYS.) 5% of operating value (fixed)
Reset method Automatic reset
Operating time
setting range (T)
Asymmetry 0.1 to 30 s
Reversed phase/
phase loss
0.1 s
Startup lock time (LOCK) 1 s/5 s (Changed with the DIP switch.)
Indicators Power (PWR): Green, Relay output (RY): Yellow, Alarm outputs (ALM): Red
Output relays One SPDT relay (NC operation)
Output relay ratings Rated load
Resistive load
5 A at 250 VAC
5 A at 30 VDC
Maximum contact voltage: 250 VAC or 30 VDC
Max. switching current: 5 A
Maximum switching capacity: 1,250 VA, 150 W
Mechanical life: 10 million operations min.
Electrical life:
5 A at 250 VAC or 30 VDC: 50,000 operations
3 A at 250 VAC/30 VDC: 100,000 operations
Ambient operating temperature -20 to 60°C (with no condensation or icing)
Storage temperature -25 to 65°C (with no condensation or icing)
Ambient operating humidity 25% to 85% (with no condensation)
Storage humidity 25% to 85% (with no condensation)
Altitude 2,000 m max.
Terminal screw tightening torque 0.49 Nm
Terminal wiring method Recommended wire
Solid wire: 2.5 mm2
Twisted wires: AWG16, AWG18
Note:
1. Ferrules with insulating sleeves must be used with twisted wires.
2. Two wires can be twisted together.
Recommended ferrules
Al 1,5-8BK (for AWG16) manufactured by Phoenix Contact
Al 1-8RD (for AWG18) manufactured by Phoenix Contact
Al 0,75-8GY (for AWG18) manufactured by Phoenix Contact
Case color N1.5
Case material PC and ABS
Weight Approx. 130 g
Mounting Mounts to DIN Track.
Dimensions 22.5 × 90 × 100 mm (W × H × D)

Specifications

Input frequency 50/60 Hz
Overload capacity Continuous input at 115% of maximum input, 10 s at 125% (up to 600 VAC).
Repeat
accuracy
Operating value ±0.5% full scale (at 25°C and 65% humidity, rated power supply voltage, 50/60
Hz sine wave input)
Operating time ±50 ms (at 25°C and 65% humidity, rated power supply voltage)
Applicable
standards
Conforming standards EN60947-5-1
Installation environment (pollution level 2, installation category III)
EMC EN60947-5-1
Safety standards UL 508 (Recognition), Korean Radio Waves Act (Act 10564),
CSA: CAN/CSA C22.2 No.14, CCC: GB14048.5
Insulation resistance 20 MΩ min.
Between external terminals and case
Between input terminals and output terminals
Dielectric strength 2,000 VAC for one minute
Between external terminals and case
Between input terminals and output terminals
Noise immunity 1,500 V power supply terminal common/normal mode
Square-wave noise of ±1 μs/100 ns pulse width with 1-ns rise time
Vibration resistance Frequency: 10 to 55 Hz, acceleration 50 m/s2
10 sweeps of 5 min each in X,Y, and Z directions
Shock resistance 150 m/s2, 3 times each in 6 directions along 3 axes
However, 100 m/s2 for relay contacts.
Degree of protection Terminals: IP20

Relationship of Mounting Distance between K8AK-PA Relays and Ambient Temperature (Reference Values)

The following diagram shows the relationship between the mounting distances and the ambient temperature.
If the relay is used with an ambient temperature that exceeds these values, the temperature of the K8AK may rise and shorten the life of the internal components.

K8AK / K8DS Series Specifications 42

K8AK-TH Temperature Monitoring Relay

Ratings

Power supply voltage 100 to 240 VAC 50/60 Hz 24 VAC 50/60 Hz or 24 VDC
Allowable voltage range 85% to 110% of power supply voltage
Power consumption 5 VA max. 2 W max. (24 VDC), 4 VA max. (24 VAC)
Sensor inputs K8AK-TH11S Thermocouple: K, J, T, E; Platinum-resistance thermometer: Pt100, Pt1000
K8AK-TH12S Thermocouple: K, J, T, E, B, R, S, PLII
Output relay One SPDT relay (5 A at 250 VAC, resistive load)
External inputs
(for latch
setting)
Contact input ON: 1 kΩ max., OFF: 100 kΩ min.
Non-contact input ON residual voltage: 1.5 V max., OFF leakage current: 0.1 mA max.
Leakage current: Approx. 10 mA
Setting method Rotary switch setting (set of three switches)
Indicators Power (PWR): Green LED, Relay output (ALM): Red LED
Other functions Alarm Mode (upper limit/lower limit), non-fail safe/fail safe selection, output
latch, setting protection, temperature unit °C/°F
Ambient operating temperature -20 to 55°C (with no condensation or icing)
Ambient operating humidity Relative humidity: 25% to 85%
Storage temperature -25 to 65°C (with no condensation or icing)

Characteristics

Measurement accuracy ±1% of the setting range
hysteresis width 2°C
Output relay 1 SPDT relay output
5 A at 250 VAC or 30 VDC (resistive load)
Electrical life: 50,000 operations.
3 A at 250 VAC or 30 VDC (resistive load)
Electrical life: 100,000 operations
Sampling cycle 100 ms
Insulation resistance 20 MΩ (at 500 V) between charged terminals and exposed uncharged parts
20 MΩ (at 500 V) between any charged terminals (i.e., between input, output, and power
supply terminals)
20 MΩ (at 500 V) between contacts (open)
Dielectric strength 2,300 VAC, 50/60 Hz for 1 min between terminals of different charge
Vibration resistance Vibration of 10 to 55 Hz and acceleration of 50 m/s2 for 5 min with 10 sweeps each in X, Y,
and Z directions
Shock resistance 150 m/s2 (100 m/s2 for relay contacts) 3 times each in 6 directions in X, Y, and Z directions
Weight Approx. 160 g
Degree of protection IP20
Memory protection Non-volatile memory (number of writes: 1 million)
Safety
Standards
Approved
standards
UL 61010-1
Installation environment (pollution level 2, installation category II)
EMC EN 61326-1
Application
standards
UL 61010-1, Korean Radio Waves Act (Act 10564), CSA: CAN/CSA C22.2 No.14,
CCC: GB14048.5
Terminal screw
tightening torque
0.49 N·m
Crimp terminals Two solid wires of 2.5 mm2 or two ferrules of 1.5 mm2 with insulation sleeves can be
tightened together.
Case color N1.5
Case material PC and ABS
Mounting Mounts to DIN Track.
Dimensions 22.5 × 100 × 90 mm (W × D × H)

Setting Ranges

K8AK-TH11S

Centigrade

K8AK / K8DS Series Specifications 48

Fahrenheit

K8AK / K8DS Series Specifications 49

K8AK-TH12S

Centigrade

K8AK / K8DS Series Specifications 51

Fahrenheit

K8AK / K8DS Series Specifications 52

Temperature Input Range

TH11S °C °F
Input type Lower limit Upper limit Lower limit Upper limit
K -20 1019 -40 1039
J -20 870 -40 1039
T -20 420 -40 740
E -20 620 -40 1039
Pt100 -20 870 -40 1039
Pt1000 -20 870 -40 1039

TH12S °C °F
Input type Lower limit Upper limit Lower limit Upper limit
K -20 1320 -40 2340
J -20 870 -40 1540
T -20 420 -40 740
E -20 620 -40 1140
B 0 1820 0 3240
R -20 1720 -40 3040
S -20 1720 -40 3040
PLII -20 1320 -40 2340

K8AK-LS Conductive Level Controller

Ratings

Rated voltage 24 VAC 50/60 Hz or 24 VDC
100 to 240 VAC 50/60 Hz
Voltage across elec-trodes 5 V p-p (Approx. 20 Hz)
Power consumption 24 VAC/DC: 2.0 VA/1.1 W max.
100 to 240 VAC: 4.6 VA max.
Operating resistance 10 to 100 kΩ (variable)
Reset resistance 250 kΩ max.
Response time Approx. 0.1 to 10 s (variable)
Length of cable 100 m max. (fully insulated 3-core 0.75-mm2 cab-tyre cable, 600 V)
Indicators PWR: Green, RY: Yellow
Output contact ratings Rated load
Resistive load
5 A at 250 VAC
5 A at 30 VDC
Maximum contact voltage: 250 VAC or 30 VDC
Max. switching current: 5 A
Maximum switching capacity: 1,250 VA, 150 W
Mechanical life: 10 million operations min.
Electrical life:
5 A at 250 VAC or 30 VDC: 50,000 operations
3 A at 250 VAC/30 VDC: 100,000 operations
Ambient operating tem-perature -20 to 60°C (with no condensation or icing)
Storage temperature -25 to 65°C (with no condensation or icing)
Ambient humidity 25% to 85% (with no condensation)
Storage humidity 25% to 85% (with no condensation)
Altitude 2,000 m max.
Terminal screw tighten-ing torque 0.49 N・m
Case color N1.5
Case material PC and ABS
Weight Approx. 150 g
Mounting Mounts to DIN Track.
Dimensions 22.5 × 90 × 100 mm (W × D × H)

Specifications

Operating voltage range 85% to 110% of rated voltage
Installation environ-ment Installation category II, pollution level 2
Approved standards EN61010-1
EMC EN61326-1
Safety standards EN 60664-1, UL 508 (Recognition), Korean Radio Waves Act (Act 10564),
CSA: CAN/CSA C22.2 No.14, CCC: GB14048.5
Insulation resistance 20 MΩ min.
Between all external terminals and the case
Between all power supply terminals and all input terminals
Between all power supply terminals and all output terminals
Between all input terminals and all output termi-nals
Dielectric strength 2,000 VAC for 1 min
Between all external terminals and the case
Between all power supply terminals and all input terminals
Between all power supply terminals and all output terminals
Between all input terminals and all output termi-nals
Noise immunity 1,500 V power supply terminal common/normal mode
Square-wave noise of ±1-μs/100-ns pulse width with 1-ns rise time
Vibration resistance Frequency: 10 to 55 Hz, acceleration 50 m/s2
10 sweeps of 5 min each in X,Y, and Z directions
Shock resistance 150 m/s2, 3 times each in 6 directions along 3 axes
However, 100 m/s2 for relay contacts.
Degree of protection Terminals: IP20