![Redline Communications AN-30e User Manual Download Page 80](http://html.mh-extra.com/html/redline-communications/an-30e/an-30e_user-manual_1429370080.webp)
AN-30e
user manual
70-00035-01
Proprietary Redline Communications © 2004
November
16,
2004
Page 80 of 103
8.2
DC Power Supply Cable Connections
This section provides important instructions for connecting to a DC power source.
The optional DC power supply is rated for operation over a range from 18 VDC to 72
VDC. Power is connected to the terminal via a fused power entry module located on
the rear of the terminal. All DC terminals are shipped with a power cord assembly,
consisting of the power entry modules mating dual pin polarized female plug, pre-
crimped with 18 AWG blue and black insulated wires. All power wiring must be at
least 18 AWG.
The DC power input is floating (+Ve and -Ve not connected to chassis), allowing
positive (minus to ground), negative (positive 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 36: DC Power Supply Cable Connections
Wire Color
Negative DC Power
(-18 to -72 VDC)
Positive DC Power
(+18 to +72 VDC)
Blue
Negative power
Power Return
Black
Power Return
Positive Power
Schematics
Note: DC units are not equipped with power switches and activate immediately when
connected to a power source.