Chapter 2 Installation and Configuration
VXI-1500 User Manual
2-8
© National Instruments Corporation
Remote Power Monitoring and Inhibit Interface
The VXI-1500 mainframe provides for remote power monitoring and
inhibit via a 25-position female D-sub connector located on the rear
panel. Table 2-2 shows the pinout of the DB-25 connector.
Table 2-2.
DB-25 Connector Pinout
DB25 Pin
Function
1
Output #1 +5 V (signal)
14
Output #1 (return)
2
Output #2 +12 V (signal)
15
Output #2 (return)
3
Output #3 -12 V (signal)
16
Output #3 (return)
4
Output #4 +24 V (signal)
17
Output #4 (return)
5
Output #5 -24 V (signal)
18
Output #5 (return)
6
Output #6 -5.2 V (signal)
19
Output #6 (return)
7
Output #7 -2 V (signal)
20
Output #7 (return)
8
Auxiliary Vcc +5 V
21
Auxiliary Ground
10
General Shutdown
11
Reset Module B1 (switch)
24
Reset Module B2 (switch 0v)
12
Remote AC Fail Signal
To use the remote power output inhibit feature, connect the General
Shutdown (pin 10) signal to Auxiliary Ground (pin 21). The power
supply inhibits its DC output as long as the General Shutdown signal is
pulled to ground. DC output resumes when the General Shutdown pin is
