Omron DEVICENET SAFETY - CONFIGURATION MANUAL 05-2005 System Configuration Manual page 14

Controlling devices
Emergency stop switch
Door interlocking switch or limit
switch
Safety sensor
Relay with forcibly guided contacts Use approved devices with forcibly guided contacts compliant with EN
Contactor
Other devices
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Requirements
Use approved devices with a direct opening mechanism compliant with
IEC/EN 60947-5-1.
Use approved devices with a direct opening mechanism compliant with
IEC/EN 60947-5-1 and capable of switching micro-loads of 4 mA at 24
VDC.
Use approved devices compliant with the relevant product standards,
regulations, and rules in the country where they are used.
50205. For feedback, use devices with contacts capable of switching
micro-loads of 4 mA at 24 VDC.
Use contactors with a forcibly guided mechanism and monitor the aux-
iliary NC contact to detect contactor failures. For feedback, use devices
with contacts capable of switching micro-loads of 4 mA at 24 VDC.
Evaluate whether devices used are appropriate to satisfy the require-
ments of the safety category level.