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I.S. INTERCOM
20-278-12
TYPE ABMA4 USER MANUAL
5 OF 21
Issue: 05
Photograph 2: Intercom type ABMA4 rear view
The above photograph shows the rear of the ABMA4 intercom with its battery removed. In the LO position
the battery charge current is 11mA and 22mA in the HI position. Refer to the system drawing for the correct
charge rate for your intercoms. Generally, the HI position is used in systems with short powered segments
and fewer intercoms, the LO position is used in long powered segments with more intercoms.
Photograph 3: Battery type 5/NH/1-N side view