Tait T809-10, Service Manual

Page: 26 / 42

26 Installation Guidelines
MBZ-00001-01
November 2004 Copyright © 2004 Tait Electronics Ltd
3.5 Remote Sense
The remote sense function enables the power supply to adjust its output to compensate
for voltage drop lost along the cables as the current travels from the power supply out-
put to the load. Connecting the remote sense allows the power supply to maintain a
13.8V
DC
at the load terminals (for example, when connected to a transmitter).
For proper operation of the remote sense function, the voltage drop along the wire
length between the power supply output and the load must be limited to less than
0.3V
DC
. Heavy gauge wire must be used to minimise this voltage drop.
3.5.1 Connecting the Remote Sense Wires
The remote sense feature is located on the auxiliary input connector (9-way D-range) on
the rear panel of the T809-10 (refer to Figure 3.3 on page 23).
To connect the remote sense feature, use the information supplied below:
The remote sense wires should be connected as close as possible to the load terminals
but must be connected to the
power supply side
of the protection device and any
switch (if used), as shown in the diagram below (Figure 3.4). For best performance, the
sensing wire should consist of a ‘twisted pair’ of wires and/or a shielded pair.
Function Aux Input
Name
D-range
Pin
Details
Remote Sense +S 2 Connected to +V at the load
–S 7 Connected to –V at the load
2
7
Auxiliary inputs
(D-range)