Using Remote Power On/Standby Switching; Figure 3-4, Using Remote Power On/Standby Switching - Racal Instruments 1269 User Manual

1269 User Manual
Using Remote
Power On/Standby
Switching

Figure 3-4, Using Remote Power On/Standby Switching

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Pin
15
7,11
1. Connect a user supplied cable (or
equivalent) between J415 (female 15
DSUB) and a remote switch, or open
collector driver. The switch (or driver)
should connect to J415 pin 15 (INHIBIT*)
and to one of the GND pins.
2. Complete Steps in Figure 3-3 Powering
On The Mainframe.
3. Place in Standby,
mainframe off, by closing remote switch
shorting pin J415-15 to Logic Ground
(INHIBIT* to GND) or by driving J415-15
to a TTL low with an open collector driver
which can sink 5mA of current. The OC
voltage at J415-15 is # 30 VDC.
4. Opening the
deasserting the open collector driver) re-
applies DC power to the mainframe
(Power On) provided the front power
switch is in the on position.
Function
Remote INHIBIT*
Logic Ground (GND)
DC power to
remote switch (or
Operating The 1269 3-5