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K8AK-AW

4

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 stan-
dards

Conforming standards

EN 60947-5-1
Installation environment (pollution level 2, installation category III)

EMC

EN 60947-5-1

Safety standards

UL 508 (Recognition), Korean Radio Waves Act (Act 10564), CSA: C22.2 No.14, 
CCC: GB14048.5

Insulation resistance

20 M

 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 

s/100 ns pulse width with 1-ns rise time

Vibration resistance

Frequency: 10 to 55 Hz, 0.35-mm single amplitude
10 sweeps of 5 min each in X,Y, and Z directions

Shock resistance

100 m/s

2

, 3 times each in 6 directions along 3 axes

Degree of protection

Terminals: IP20

AW (I2 terminal)

0

10

60

50

40

30

20

5

10

15

Distance between products d [mm]

I = 5 A

I = 3 A

I = 1 A

I = 0 A

Ambient temper

ature [°C]

K8AK

No.3

K8AK

No.2

K8AK

No.1

K8AK

No.4

K8AK

No.5

DIN Track

Distance between products: d

Sample: K8AK-AW
Applied voltage: 240 VAC 
Mounting distances: 0, 5, and 10 mm min.

Test method

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.

Summary of Contents for K8AK-AS1 24VAC/DC

Page 1: ...ent Transformer CT Direct input is not possible Accessory Order Separately OMRON CT Commercially Available CTs If you use a commercially available CT do not exceed the overload capacity of the K8AK AW...

Page 2: ...mA AC DC 50 to 500 mA AC DC Approx 5 Direct input Continuous input at 120 of maximum input 1 s at 150 0 to 100 mA AC DC I2 COM Approx 1 Direct input 0 to 500 mA AC DC I3 COM Approx 0 2 Direct input K...

Page 3: ...puts 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 3...

Page 4: ...minals 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 su...

Page 5: ...h the OMRON K8AC CT200L Current Transformer CT Wiring Example Directly Inputting a Current Using a CT Always turn on the control power supply for the K8AK at least 2 seconds before turning on the powe...

Page 6: ...AL1 Contact b for the approx 1 second interval immediately after the K8AK control power supply is turned on After that a switch to contact a will be made as an overcurrent state is no longer present A...

Page 7: ...K8AK power supply voltage Power ON Undercurrent AL2 contacts 21 24 Undercurrent set value AL2 30 of AL1 current set value Overcurrent AL1 contacts 11 14 Lit AL2 alarm indicator AL1 alarm indicator Ove...

Page 8: ...ng time 0 1 to 30 s t Operating time 0 1 to 30 s t t Delay 250 ms reference value Delay 250 ms reference value Delay 250 ms reference value Delay 250 ms reference value Flashing Flashing Power ON lock...

Page 9: ...ched the same level Use this as a guide to set the current The maximum setting range will differ depending on the model and the input terminal Example K8AK AW3 Using Input Terminals I3 COM The maximum...

Page 10: ...de to set the startup lock time The startup lock time will start when the input current reaches 30 or more of the set value Use startup lock time to prevent unwanted operation e g as a result of inrus...

Page 11: ...figure for information on the motor startup current For a motor with a rating of 5 A the startup current will be approximately 30 A The startup current will exceed the overload capacity rating 150 for...

Page 12: ...cified torque of 0 49 to 0 59 N m Use of the product beyond its life may result in contact welding or burning Make sure to consider the actual operating conditions and use the product within its rated...

Page 13: ...ifficult to see 15 Do not use the product if it is accidentally dropped The internal components may be damaged 16 Be sure you understand the contents of this catalog and handle the product according t...

Page 14: ...MEMO 14...

Page 15: ...CONNECTED WITH THE PRODUCTS WHETHER SUCH CLAIM IS BASED IN CONTRACT WARRANTY NEGLIGENCE OR STRICT LIABILITY Further in no event shall liability of Omron Companies exceed the individual price of the Pr...

Page 16: ...0169 U S A Tel 1 847 843 7900 Fax 1 847 843 7787 Regional Headquarters OMRON EUROPE B V Wegalaan 67 69 2132 JD Hoofddorp The Netherlands Tel 31 2356 81 300 Fax 31 2356 81 388 Contact www ia omron com...

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