1261B User Manual
Racal Instruments
Ó
1995
Operating The 1261B 3-7
1. Connect a user supplied cable (or
equivalent) between J415 (female 25 DSUB)
and a remote switch, or open collector
driver. The switch (or driver) should connect
to J415 pin 23 (INHIBIT*) and to one of the
GND pins.
2.
Complete Steps in Figure 3-5 Powering On
The Mainframe.
3. Place
in
Standby
, DC power to mainframe
off
, by closing remote switch shorting pin
J415-23 to Logic Ground (INHIBIT* to GND)
or by driving J415-23 to a TTL low with an
open collector driver which can sink 10mA of
current.
4.
Opening the remote switch (or deasserting
the open collector driver) re-applies DC
power to the mainframe (
Power On
)
provided the front power switch is in the
on
position.
Using Remote
Power On/Standby
Switching
Pin
Function
23
Remote INHIBIT*
2,4,14 or 24
Logic Ground (GND)
Figure 3-6, Using Remote Power On/Standby Switching
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