2: MODULE SPECIFICATIONS« FC4A MICRO SMART USER ’S MANUAL » 2-67Clock CartridgeWith the optional clock cartridge installed on any type of MicroSmart CPU modules, the MicroSmart can be used fortime-scheduled control such as illumination and air conditioners. For setting the calendar/clock, see page 15-5.Clock Cartridge Type NumberClock Cartridge SpecificationsThe optional memory cartridge (FC4A-PM32) and the clock cartridge cannot be used together on the all-in-one type CPUmodule. The memory cartridge and the clock cartridge can be used together on the slim type CPU module.Installing and Removing the Clock CartridgeAll-in-One Type CPU ModuleThe cartridge connector is normally closed with adummy cartridge. To install the clock cartridge, openthe terminal cover and remove the dummy cartridgefrom the CPU module. Make sure of correct orienta-tion of the clock cartridge. Insert the clock cartridgeinto the cartridge connector until it bottoms. Do notinsert the clock cartridge diagonally, otherwise theterminal pins will be deformed. After installing theclock cartridge, close the terminal cover.To remove the clock cartridge, hold both edges of theclock cartridge and pull it out.Slim Type CPU ModuleTo install the clock cartridge, open the hinged lid andremove the dummy cartridge from the CPU module.Make sure of correct orientation of the clock car-tridge, and insert the clock cartridge into cartridgeconnector 1 or 2 until it bottoms. After installing theclock cartridge, close the hinged lid.Only one clock cartridge can be installed to eithercartridge connector 1 or 2 on the slim type CPUmodule. A clock cartridge and a memory cartridgecan be installed at the same time.To remove the clock cartridge, hold both edges of theclock cartridge and pull it out.Module Name Type No.Clock Cartridge FC4A-PT1Accuracy ±30 sec/month (typical) at 25°CBackup Duration Approx. 30 days (typical) at 25°C after backup battery fully chargedBattery Lithium secondary batteryCharging Time Approx. 10 hours for charging from 0% to 90% of full chargeBattery Life Approx. 100 recharge cycles after discharging down to 10% of full chargeReplaceability Not possible to replace batteryCaution • Before installing or removing the clock cartridge, turn off the power to the MicroSmart CPUmodule. Otherwise, the clock cartridge or CPU module may be damaged, or the MicroSmart maynot operate correctly.• Do not touch the connector pins with hand, otherwise electrostatic discharge may damage theinternal elements.Terminal CoverCartridgeConnectorClock CartridgeFC4A-PT1Hinged LidCartridge Connector 1Clock CartridgeFC4A-PT1Cartridge Connector 2