2) How to Replace Backup Battery
• Replace the battery within three minutes, after applying the power to the programmable controller more than one
minute.
Procedure
3. Removable Terminal
• Removable terminal construction is used for C24, C40, C56, and C72 series Control Units. This makes wiring of
the I/O terminal easier.
If the Control Units are replaced for some reason, there will be no need to disconnect and re-connect all the cables
to the terminals again by changing the terminal blocks.
COM
0
COM
1
COM
2
COM
3
COM
4
COM
5
COM
6
COM
7
+
-
24V DC
F.G.
COM
F
8
9
E
A
B
C
D
(+)
-
COM
7
0
1
6
2
3
4
5
(+)
-
RUN
REMOTE
PROG.
V0
max.
min.
RUN
PROG.
ERR.
ALRAM
BATTERY
V1
max.
PC
FP1-C24
24V DC
+
-
min.
Battery cover
Backup
battery
Connector
Screw
Terminal block
Screw
Screw
Terminal block
Screw
Unit cover
Pull
1
Turn OFF the power of the programmable
controller.
2
Remove the memory unit cover.
3
Disconnect the connector of the backup battery
and pull it up so that the battery cover is
removed, as shown in the figure on the right.
4
Take out the battery by pulling up the lead
wire.
5
Install a new battery and connect it to the
connector on the programmable controller.
6
Replace the battery cover and the memory unit
cover.
7
Turn ON the power of the programmable
controller.
217
7-3. Maintenance
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