Datron TW7000MS, Technical Manual

Page: 21 / 100

2: Installation
TW7000MS 2-3
is the air exhaust. Between them are the rear panel connectors and the fuse
holder. Behind the panel is an input power protection circuit board. Ribbon
cables connect the rear panel to the motherboard.
2.5.1
Power to the
TW7000
Input power is nominally 13.8 Vdc, with a maximum current requirement of
approximately 25A. The recommended operational voltage range of the
TW7000 is 11 to 15.5 Vdc. The
12VDC INPUT connector on the rear panel is
a 2 pin 25A circular receptacle having a square mounting flange with 2 male
pins. The mating plug is attached to the input DC power cable (C991829)
supplied with the TW7000. This cable has two 12 AWG conductors, is 6.5 ft.
long, and open-ended for convenient connection to a variety of +12 Vdc
sources. For specific connections,
refer to the "Power Cabling Accessories"
figure on page 2-12.
The pin assignments for the input power connector are as follows:
The DC power connection between the TW7000 and its power source should
be as short as possible. If a DWC power cable is not available, use a 14 AWG
cable for runs up to 3 feet, a 12 AWG cable for runs to 9 feet, or a 10 AWG
cable for longer runs.
Figure 2-1. TW7000 Rear Panel
Input Power
Accessory 2
Accessory 1
Accessory 3
Antenna
Ground Remote
Pin Number Description
1 12 Vdc return (ground)
2 12 Vdc