Replace The Lithium Battery; Replace The 12 Vdc Battery - ABB RMC-100 User Manual

Figure 8-39: Front View - Remove top housing from base
9. Push the handle of the screwdriver away from the body of the RMC to gently pry the clip loose
from the two top slots. Then push up. From the two bottom slots, push down.
10. Remove the top housing from the base when all four corners are released.
8.8.5

Replace the lithium battery

IMPORTANT NOTE: Perform lithium battery replacement only while the RMC is powered on, so the
real time clock continues to run. If the power is off, the real time clock resets to factory defaults
and must be changed according to section 8.6,
Reconnect the power after removing the cover, and before replacing the battery, to avoid clock
reset. Leave the RMC on the DIN rail for ease of access to the power cables in both standalone and
enclosure installations.
To replace the lithium battery:
1. Test the new battery to verify that it is fully charged. The battery voltage should be no less
than 3.6 Vdc.
2. Remove the housing cover according to section 8.8.4. Do not remove the RMC from the DIN
rail.
3. Reconnect power to the controller according to section 8.7.2.
4. Grasp the existing battery on each side and pull from the bracket.
5. Insert a new lithium battery into the bracket. Observe the polarity (+/-) of the lithium battery
and the battery bracket.
6. Remove power from the controller according to section 8.7.1.
7. Reinsert the housing cover into the base.
8. Reconnect terminal connectors to I/O and COMM ports.
9. Reinsert serial communication modules.
10. Reconnect cables to communication ports (USB, Ethernet, or MMI).
11. Reconnect TFIO modules to the TFIO A and B interfaces (if used).
12. Reconnect power to the controller according to section 8.7.2.
13. Verify on the LCD that the controller's power-on sequence completes.
Because the battery was replaced with the power off, the clock has reset. To change the clock to
current date/time:
1. Connect to one of the local communication ports.
2. Establish PCCU connection and click on Entry.
3. A message box displays asking to synchronize the date and time.
4. Click Yes. The RMC calendar clock synchronizes with the laptop date and time.
8.8.6

Replace the 12 Vdc battery

These instructions describe the removal and replacement of the 12 Vdc battery.
NOTICE –Loss of data. Do not remove the lithium battery from the electronic board (RMC
board) when removing the 12 Vdc battery. The lithium battery keeps the real-time clock
running.
To replace the 12 Vdc battery:
Change the clock.
21 05 55 2MN A E | RM C-1 00 | 1 9 9