IDEC SMARTRELAY User Manual page 40

IDEC SmartRelay installation and wiring
2.3 Wiring IDEC SmartRelay
Connecting IDEC SmartRelay
Connect IDEC SmartRelay to the power supply as shown below, depending on whether your
power supply is DC or AC:
Note
IDEC SmartRelay is a double-insulated switchgear. You must connect its FE terminal to
earth ground.
Circuit protection with AC voltage
To suppress voltage peaks on the power supply lines, you can install a metal oxide varistor
(MOV). Make sure the operating voltage of the varistor (MOV) used lies at least 20% above
the rated voltage.
Circuit protection with DC voltage
To suppress voltage peaks on the power supply lines, install a protection device.
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IDEC SmartRelay Manual