Motoman PX2750, Manual, Page: 287 / 611

3.6 Battery Inspections
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Battery Inspections
The XRC has a battery that backs up the important program files for user data in the CMOS
memory.
A battery alarm indicates when a battery has expired and must be replaced. The programming
pendant display and the message "Memory battery weak" appears at the bottom of the dis-
play.
The way to replace the battery is described in “9.1.1 Replacing Parts of the CPU Rack” of the
YASNAC XRC Instructions.
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Power Supply Voltage Confirmation
Check the voltage of 1 (R), 3 (S), 5 (T) terminal of the disconnecting switch (QS1) with an
electric tester.
Disconnecting Switch (QS1)
Power Supply Voltage Confirmation
Measuring Items Terminals Correct Value
Correlate voltage Between 1 and 3 (R and S),
3 and 5 (S and T), 1 and 5
(R and T) 575/480/240 V (+10%, -15%)
Voltage between earth
(S phase ground) Between 1 and E (R and E),
5 and E (T and E) 575/480/240 V (+10%, -15%)
Between 3 and E (S and E) About 0V
3(S)
5(T) E
E 4(V) 6(W)
1(R)
2(U)
OFF