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DPBF1U & DPGF1U SERIES
OPERATING MANUAL
P O W E R I N G T E C H N O L O G Y
Document Number: DPBF-DPGF-MAN Rev. 5
dpbf_dpgf-man-Rev5-0719.indd
6.0
DESCRIPTION OF OPERATION
6.1
Power Distribution Circuits.
A simplified schematic diagram of the distribution panels
is shown in Figure 2. The battery input to each load connects to a high-current copper bus
bar from which the individual fuses or circuit breakers distribute power to the loads. The
return input connects to a similar bus bar to which the individual loads terminate. The A
and B loads are totally independent and isolated with the exception of models incorporating
the ‘S’ option.
CIRCUIT
BREAKERS
or
GMT FUSES
BATT.
BATT.
INPUT
RET.
INPUT
RET.
HI-CURRENT BUS BAR
HI-CURRENT BUS BAR
HI-CURRENT BUS BAR
HI-CURRENT BUS BAR
LOADS
LOADS
1
2
3...
N
N
...3
2
1
A SIDE
ALARM
CIRCUITS
b SIDE
ALARM
CIRCUITS
A SIDE
B SIDE
-S OPTION
-S OPTION
Figure 2. Block Diagram
6.2
Alarm Circuits.
The alarm circuits detect a tripped circuit breaker or blown and, in this
event, turn on the red part of the LEDs. The alarm circuits also each drive Form C relay
contacts. If one or more circuits open or if there is an input power failure, the relays are
de-energized and the contacts are used to control external audible or visual alarms. The A
and B alarm circuits are also independent and isolated from each other.
LED & RELAY STATE MEANINGS
LED State
Relay State
Meaning
Green
Energized (N.O. is closed)
OK
Red
De-energized
(N.O. is open)
Breaker Trip
or
Breaker OFF
or
Fuse Blown
OFF
No Input Power
Table 2. LED State Definitions
