Mitsubishi Electric Q26UD(E)HCPU User Manual page 244

(2) For Q3MEM-4MBS and Q3MEM-8MBS
Set the battery holder fixing switch
to the RELEASE position.
Pull out the battery holder of the
SRAM card.
Set the battery on the holder with
the positive (+) side facing up.
Place the holder back to the SRAM
card.
Set the battery holder fixing switch
to the LOCK position.
*1 The following shows the direction of a battery.
Positive (+) side
242
Completed
Maker name
Model
Polarity
Voltage
Negative (-) side
RELEASE
position
Battery holder
fixing switch
Battery holder
LOCK
position
Product number
(The number differs depending on the date
of manufacture.)
*1
Positive (+) side