Spectrum 1746sc-CTR4, Owner'S Manual, Page: 14 / 66

14
ControlLogix
™
Counter Module
CAUTION
POSSIBLE EQUIPMENT OPERATION
Before installing or removing your module, always disconnect
power from the SLC 500 system and from any other source to
the module (in other words, don’t “hot swap” your module), and
disconnect any devices wired to the module.
Failure to observe this precaution can cause unintended
equipment operation and damage.
When inserting your module into the rack, you do not need to remove the
supplied 36-position terminal block from the module. If, however, you do
remove the terminal block, use the write-on label to identify your
module’s location.
To remove the terminal block, unscrew the two retaining screws at the
top and bottom of the terminal block, and using a screwdriver or needle-
nose pliers, carefully pry the terminal block loose.
To insert your module into the rack, follow these steps:
1. Align the circuit board of your module with the card guides at the top
and bottom of the chassis.
!