Tait T809-10, Service Manual

Page: 28 / 42

28 Installation Guidelines
MBZ-00001-01
November 2004 Copyright © 2004 Tait Electronics Ltd
3.6 Remote Control
The output voltage of the T809-10 can be remotely controlled by applying a DC control
voltage across the auxiliary RC and –RC. The auxiliary inputs are located on the
auxiliary input connector (9-way D-range) on the rear panel of the T809-10.
To connect the remote control feature, use the information supplied in the table below:
A ‘high’ voltage level (4 to 10V
DC
) RC and –RC will switch the output OFF,
while a ‘low’ level (0 to 0.8V
DC
) switches the output ON.
3.6.1 Using a Control Voltage Above 10V
DC
If a control voltage greater than 10V
DC
is used, an additional series current-limiting
resistor is required to keep the input current below 10mA (1mA/1V). The additional
series resistor is shown as R* in the circuit diagrams below (Figure 3.5).
Function Aux Input
Name
D-range
Pin
Details
Remote Control +RC 6 PSU OFF = 4 to 10V
DC
RC
and –RC
PSU ON = 0 to 0.8V
DC
RC
and –RC
Note: Additional current limiting
resistor required if >10V is used.
–RC 3
Ground GND 8 Warning: Pin 8 is connected to the
negative output. It will only be chas-
sis ground when the power supply is
used in a T800 subrack
3
6 8
Auxiliary inputs
(D-range)