KEYENCE KV Series - Manual (Page 22)

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Note 1: Use a load coil whose rating is less than the contact capacity.
Note 2: Use a diode whose peak inverse voltage is 10 times or more the circuit voltage
and whose forward current is not less than the load current.
Note 3: Individually attach diodes, varistors, and CR circuits directly to the relay coil
terminal.
CONNECTING KV SERIES EXPANSION UNITS
• Connect a basic unit and an expansion unit with an expansion cable.
• An expansion cable approximately 60 mm long is provided as standard.
• When extending the expansion cable, use long expansion cables
(300 mm) (OP-35361).
• Up to two expansion cables (300 mm) can be connected to one basic unit.
• The READY/ERROR LED is lit during normal communication, flashes
when an abnormality occurs, and is not lit when the power is not supplied
correctly. If this LED is not lit, check whether the expansion cables are
correctly connected.
Standard cable (approx. 60 mm)
Expansion unit Expansion unit Basic unit
Standard cable (approx. 60) + Long cable (approx. 300 mm)
Expansion cable
(300 mm)
Expansion cable
(300 mm)
Expansion cable
(60 mm)
Expansion unit Expansion unit Basic unit Expansion unit Basic unit
Long cable (approx. 300 mm)
Expansion
cable (300 mm)
Expansion
cable (60 mm)