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K8AK-VW

5

Nomenclature

Front

Indicators

Setting Knobs

Note: 1.

Use either a solid wire of 2.5 mm

2

 maximum or a ferrule with 

insulating sleeve for the terminal connection.
The length of the exposed current-carrying part inserted into 
the terminal must be 8 mm or less to maintain dielectric 
strength after connection.

Recommended ferrules

Phoenix Contact

Al 1,5-8BK (for AWG16)

Al 1-8RD (for AWG18)

Al 0,75-8GY (for AWG18)

2.

Screw tightening torque: 0.49 to 0.59 N·m

Power indicator

Relay status indicator

Voltage knob (AL1)

Voltage knob (AL2)

Operating time knob (T)

Alarm indicator

Terminal block

(See notes 1 and 2.)

Terminal block

(See notes 1 and 2.)

Item

Meaning

Power indicator
(PWR: Green)

Lit when power is being supplied.

Relay status indicator
(RY: Yellow)

Lit when relay operates (Not light when 
both AL1 and AL2 are in error status) (Nor-
mally lit)

Alarm indicators
(AL1 and AL2: Red)

Lit when there is an overvoltage or under-
voltage. 
The indicator flashes to indicate the error 
status after the input has exceeded the set 
value while the operating time is being 
clocked.

Item

Usage

Voltage knob (AL1)

Used to set the voltage to 10% to 100% of 
maximum setting range.

Voltage knob (AL2)

Used to set the voltage to 10% to 100% of 
maximum setting range.

Operating time knob (T)

Used to set the operating time to 0.1 to 30 
s.

For 2.5 mm

2

 or 

smaller solid wires

For ferrules with 
an insulation sleeve.

8 mm max.

8 mm max.

Summary of Contents for 378174

Page 1: ...afety Precautions on page 9 Refer to page 8 for commonly asked questions For the most recent information on models that have been certified for safety standards refer to your OMRON website Setting ran...

Page 2: ...stive load 5 A at 250 VAC 5 A at 30 VDC Maximum switching capacity 1 250 VA 150 W Minimum load 5 VDC 10 mA reference values Mechanical life 10 million operations min Electrical life 5 A at 250 VAC or...

Page 3: ...4 CCC GB T 14048 5 Insulation resistance 20 M min Between all external terminals and the case Between all power supply terminals and all input terminals Between all power supply terminals and all outp...

Page 4: ...is no relay output during timer operation V1 21 V2 V3 24 22 11 12 14 A1 A2 C A1 A2 Single phase power supply Load Power supply voltage Power supply AC DC t t1 t Delay 250 ms reference value Delay 250...

Page 5: ...tes 1 and 2 Terminal block See notes 1 and 2 Item Meaning Power indicator PWR Green Lit when power is being supplied Relay status indicator RY Yellow Lit when relay operates Not light when both AL1 an...

Page 6: ...perating mode are set using the DIP switch located on the bottom of the Unit Model Setting range Wiring connection K8AK VW2 1 to 10 V AC DC V1 COM 3 to 30 V AC DC V2 COM 15 to 150 V AC DC V3 COM K8AK...

Page 7: ...sing Input Terminal V3 COM The maximum setting range will be 600 VAC VDC and the setting range will be 60 to 600 V Operating Time The operating time is set using the operating time knob T The operatin...

Page 8: ...nnection Diagram How to Measure the Operating Time Overvoltage Change the input suddenly from 0 to 120 of the set value and measure the time until the Unit operates Undervoltage Change the input sudde...

Page 9: ...9 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 load and electrical life co...

Page 10: ...rely and become difficult 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 pr...

Page 11: ...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 12: ...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 Tokyo JA...

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