Mitsubishi Electric MELSEC iQ-R Series User Manual page 32

No. Name
(16) Battery
(17) Battery connector pin
(18) Cassette cover
(19) LED cover
(20) USB cover
(21) Production information marking
*1 When a cable is connected to the USB connector at all times, clamp the cable to prevent a poor connection, moving, and disconnection
by unintentional pulling.
1 CPU MODULE
30
Description
A backup battery to hold clock data and to use the backup power function for the device/label memory
A pin for connecting a lead wire of the battery
(To save the battery, the lead wire is disconnected from the connector before shipment.)
A cover for the connector where an extended SRAM cassette is inserted ( Page 31 EXTENDED SRAM
CASSETTE,  Page 39 Inserting or Removing an Extended SRAM Cassette)
A cover for the LED indicators, SD memory card slot, and switches. Open this cover and insert or remove an SD
memory card or set the RUN/STOP/RESET switch.
Otherwise, keep the cover closed to prevent entry of foreign matter such as dust.
A cover for the USB port. Open this cover and connect a USB-compatible peripheral.
Otherwise, keep the cover closed to prevent entry of foreign matter such as dust.
Shows the production information (16 digits) of the module.