INM 725B Rev 2111114 1 Real Time ClockThe comm’s card comes with a battery backed RTC which keeps running even if power is lostto the unit. The Battery also powers the SRAM which is used to store the buffers on powerloss. The Battery is only drained while no power is present on the unit. The clock can be set inthe configuration software using the synchronise time tool.Note:Units will be shipped with the jumper link set in the N/C position to stop the Batteryfrom going flat before installation. Before applying power this link should be set to theBAT position.Event BuffersEach port has its own buffer which can hold up to 500 events. There is also a sort buffer thatcan also hold 760 events if the port buffer become full. If the sort buffer becomes full then theevents will back up on the alarm cards.Each alarm card can hold 900 events. On power loss the buffers will remain as long as thebattery is functioning.To delete the buffers either remove the battery power (This will only clear the comm’s cardbuffer not the Alarm card buffers) or use the Clear buffer tool in the configuration software.ORBATTERYCONNECTIONCONNECTEDNOT CONNECTEDBATN/CBAT LK1 N/C SW1SW2RX TXTERMINATINGRESISTORSBAT LK1 N/CPORT4 PORT2BAT13VCARD ADDRESSDIL SWITCH SW1LK1COM12
