ACR2000 Hardware ManualP/N PM0811730ACRCOMM MODULE JUMPERS (OPTIONAL)Battery Enable Jumpers (J5 and J6)These two jumpers enable or disable the batteries on the ACRCOMM module. Aprimary 1000mA-Hr Lithium (LI) coin battery is provided on the module (BT1 – locatedon front of board – user-replaceable). A 50mA-Hr rechargeable Vanadium-Lithium (VA-LI) battery is also provided as a short-term secondary back-up source (BT2 – located onback of board – factory replaceable only). This allows for continued back-up of the usermemory during replacement of the primary battery.The factory default jumper settings are set to disconnect the batteries from thecircuit. This prevents the battery power from draining during shipping. Thejumpers must be moved to the Battery Load Enable positions for normal batteryback-up operation.Battery Selection JumpersBattery Type/Function J5 J6Battery Load Enable (BT1 and BT2 installed) 1-2 1-2Battery Load Enable (BT1 only installed) 2-3 1-2Battery Load Disable 2-3 2-3Table 2.2 ACRCOMM Battery Selection JumpersRefer to Figure 4 for jumper location.
