Allen-Bradley SMC-50, User Manual

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164 Rockwell Automation Publication 1560F-UM001A-EN-P - June 2019
Chapter 9 Troubleshooting
Control Module Removal
The control module is not intended for field repair. The entire module must be
replaced in the event of failure. The following procedure must be followed before
unplugging the control module.
1. Remove all power from the equipment.
2. Make sure that the wires are properly marked and that the program
parameters are recorded.
3. Disconnect all control wires to control module.
4. Loosen the four control module screws.
5. Carefully rotate the module to the left, and unplug the five ribbon cables
from the interface board.
To install control module, follow the reverse order for removal.
Real Time Clock (RTC)
Battery Replacement
The SMC-50 Control Module comes standard with a RTC used to time and date
stamp Faults and Alarms. When the control power is not applied to the SMC-50,
the operation of the RTC is maintained by an off-the-shelf Lithium™ CR2032
coin cell battery. The battery must be replaced if the SMC-50’s low battery alarm
is activated.
To replace the battery:
1. Perform the steps that are required to remove the control module. See the
control module installation instructions, publication 150-IN078 .
2. Locate the battery on the circuit board. Note the positive symbol is facing
upward.
SHOCK HAZARD:
To avoid shock hazard, ensure the main power has
been disconnected before working on the controller, motor or control
devices. Verify that all circuits are voltage free using a hot stick or
appropriate voltage measuring device. Failure to do so may result in
burns, injury or death.
ATTENTION:
When removing the control module, make sure to hold
the module in place as the screws are removed, to avoid strain on the
ribbon cables.
The MV SMC-50 must use firmware release 4.006 or later. This User Manual
pertains to units with firmware released 6.xxx (or later).