Rockwell Automation 1769-SM2 Compact I/O DSI/Modbus Communication Module - Manual (Page 24)

2-2 Installing the Module
!
ATTENTION: Risk of equipment damage exists. The 1769-SM2
module contains ESD (Electrostatic Discharge) sensitive parts that can
be damaged if you do not follow ESD control procedures. Static control
precautions are required when handling the module. If you are
unfamiliar with static control procedures, refer to Guarding Against
Electrostatic Damage (publication 8000-4.5.2).
Removing Power
!
ATTENTION: Risk of equipment damage exists. Remove power
before installing or removing the 1769-SM2 module. When you install
or remove the module with power applied, an electrical arc may occur.
An electrical arc can cause personal injury or equipment damage by:
•
Sending an erroneous signal to your system’s field devices, causing
unintended machine motion.
•
Causing an explosion in a hazardous environment.
Electrical arcing causes excessive wear to contacts on both the module
and its mating connector. Worn contacts may create electrical
resistance.