26 Rockwell Automation Publication 1791ES-UM001G-EN-P - November 2016
Chapter 1 Safety Function Operation
Safety output faults are considered critical enough to require a module power
cycle to clear (a sourcing safety output channel that is shorted to output power
supply positive). This condition applies to modules with sourcing-only safety
outputs (only 1732ES-IB8XOB8 and 1732ES-IB12XOB4 modules).
One of these faults on any safety output channel results in all sourcing-only
safety outputs being placed in the safe state (off ). This condition applies to
modules with sourcing-only safety outputs (only 1732ES-IB8XOB8 and
1732ES-IB12XOB4 modules).
Follow this procedure to reactivate the safety outputs after one of these faults.
1. Remove the cause of the error.
2. Power cycle the module.
The output data can now be controlled.
Controlling Devices
See Table 5 for information about controlling devices.
ATTENTION: Use appropriate devices as indicated in the Controlling
Device Requirements table. Serious injury can occur due to loss of safety
functions.
Table 5 - Controlling Device Requirements
Device Requirement Allen-Bradley® Bulletin Safety Components
Emergency stop switches Use approved devices with direct opening mechanisms that comply with
IEC/EN 60947-5-1.
Bulletin 800F, 800T
Door interlocking switches,
limit switches
Use approved devices with direct opening mechanisms that comply with
IEC/EN 60947-5-1 and capable of switching microloads of 24V DC 5 mA.
Bulletin 440K, 440G, 440H for interlock switch
Bulletin 440P, 802T for limit switch
Safety sensors Use approved devices that comply with the relevant product standards,
regulations, and rules in the country where used.
Any Guardmaster® product
Relays with forcibly guided
contacts, contactors
Use approved devices with forcibly guided contacts that comply with EN 50205.
For feedback purposes, use devices with contacts capable of switching micro loads
of 24V DC 5 mA.
Bulletin 700S, 100S
Other devices Evaluate whether devices used are appropriate to satisfy the requirements of
safety category levels.
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