Red
MAX
™
Base Station
user manual
Doc. #70-00058-01-01-DRAFT
Proprietary Redline Communications © 2006
November
29,
2006
Page 96 of 106
8.4
DC Power Connections
This section provides important instructions for connecting to a DC power source.
The DC power supply (optional) is rated for operation from 21 to 60 volts DC.
Warning to service personnel:
Caution for all AC and DC models – Double Pole/Neutral fusing.
Power is supplied to the terminal using a fused power entry module. All DC terminals are
shipped with a one-meter power cord assembly, consisting of the power entry module’s
mating dual pin polarized female plug pre-crimped with 18 AWG blue and black
insulated wires. If the wiring needs to be extended a minimum of 18 AWG wire must be
used.
The DC power input is floating (+Ve and -Ve not connected to chassis), allowing positive
(minus to ground), negative (plus to ground), and floating power connections as required.
Refer to table below for connection details.
If the terminal does not power on, it is possible that the blue and black wires are
connected incorrectly resulting in a reversal of polarity. In this event, the diode protection
prevents permanent damage to the power supply. Reverse the power connections and
verify that the terminal powers up properly.
Table 41: DC Power Supply Cable Connections
Wire Color
Negative DC Power
(-21 to –60 VDC)
Positive DC Power
(+21 to +60 VDC)
Blue
Negative power
Power Return
Black
Power Return
Positive Power
Schematics
Warning to service personnel:
DC units are not equipped with power switches and activate
immediately when connected to a power source.