16 Rockwell Automation Publication 1756-UM013B-EN-P - October 2019
Chapter 1 Digital Safety I/O Module Operation in a Control System
Safety Precautions
Observe these precautions for the proper use 1756 ControlLogix digital safety
I/O modules.
For more information about safety precautions, see Ownership on page 24
.
Installing and Replacing Modules
ATTENTION: Personnel responsible for the application of safety-related
programmable electronic systems (PES) shall be aware of the safety
requirements in the application of the system and shall be trained in the use
of the system.
ATTENTION: As serious injury can occur due to loss of required safety
function, follow these safety precautions.
• Never use test outputs as safety outputs. Test outputs are not safety outputs.
• Do not use standard I/O data or explicit message data as safety data.
• Do not use the light-emitting diode (LED) status indicators on the I/O
modules for safety operations.
• Do not connect loads beyond the rated value to the safety outputs.
• Apply properly specified voltages to the module. Applying inappropriate
voltages can cause the module to fail to perform its specified function,
which could lead to loss of safety functions or damage to the module.
• Wire the 1756 ControlLogix digital safety I/O modules as shown in the 1756
ControlLogix I/O Specifications Technical Data, publication 1756-TD002
.
• Set unique network node addresses before you connect devices to the
network.
• Perform testing to confirm that device wiring, configuration, and operation
is correct before you start system operation.
• Do not disassemble, repair, or modify the module. This can result in loss of
safety functions.
ATTENTION:
• Configure the replacement device properly and confirm that it operates
correctly.
• After installation of the module, a safety administrator must confirm the
installation and conduct trial operation and maintenance.
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