National Instruments VXI Series User Manual

Also see for VXI Series: Getting started

Contents

National Instruments VXI Series User Manual Manual pdf 13 page image

Chapter 1 Using the MainframeVXI-1501 User Manual 1-6 www.ni.comACFAIL* This pin lets you monitor the ACFAIL*signal from the backplane. Because thispin is connected directly to the backplane,do not violate VXI backplane electricalspecifications (that is, keep the cable asshort as possible or buffer the signal,etc.).EXHAUST_TEMP This pin provides an analog output that isproportional to the power supply exhausttemperature. Using this circuit, you canmonitor the actual temperature of thepower supply exhaust temperature toreceive a warning signal that themainframe is running under abnormalconditions. This output provides 0 VDCat 0 °C, with a rise of 10 mV per degreecentigrade when referenced to chassisground.Remote Standby SwitchThe remote standby switch connection lets you turn the mainframe ON orput it in STANDBY mode remotely. These two connections are wired inparallel with the front panel ON/STANDBY switch. The front panel switchmust be in STANDBY position for the remote switch to function correctly.Figure 1-3. Remote Standby Switch Wiring