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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
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
A SIDE
ALARM
CIRCUITS
B SIDE
ALARM
CIRCUITS
A SIDE
B SIDE
-S OPTION
-S OPTION
1
2
3...
N
Figure 2. Block Diagram
6.2
Alarm Circuits.
The alarm circuits detect a tripped circuit breaker 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
OFF
No Input Power
