User manual

Main and auxiliary power input comes from 12 or 24 VDC via a terminal block on the unit’s front panel
(12 or 24 V modes are set by front-panel jumpers). Automatic, temperature-compensated charging circuits
recharge the internal batteries quickly and safely. For trouble-free operation, you must fully charge the
batteries before use. The charged battery runtime will depend on the load and mode of operation.
During use of the internal batteries, the Charging LED blinks and a beeper sounds when battery life is
almost exhausted. Within a few minutes, internal cutoff circuits disconnect the load from the batteries to
prevent the possibility of deep-cycle damage.
Note: Current protection is provided by four fuses: Two 7.5A fuses for the unit’s internal batteries,
one 7.5 A fuse for an auxiliary (external) battery, and a 15 A fuse for the power input.
You can use a CA-172 cable to connect a vehicle battery (via a cigarette lighter) to the DBK34A
terminal board. The cable is six feet long, contains a cigarette lighter adapter at one end, and
stripped leads (for terminal connection) at the other.
For trouble-free operation, fully charge the batteries before use.
DBK34A Block Diagram
DBK34A, pg. 2 879795 DBK Option Cards and Modules