Chapter 2 Installation, Configuration, and OperationPXI-1000B User Manual2-4 ©National Instruments Corporationconnector (9-pin D-sub) located on the rear panel. Refer to Table 2-2 for apinout diagram of the remote power monitoring connector. Connect thereference lead of the voltmeter to one of the ground pins. Compare eachvoltage reading to the values listed in Table 2-1.Note Use the rear-panel D-sub connector to check voltages only. Do not use theconnector to supply power to external devices.If the voltages fall within the specified ranges, the mainframe complieswith the CompactPCI voltage limit specifications. Notice that therear-panel D-sub connector is to be used to check voltages only. Do notuse these voltages to supply power to external devices.Note If the fans or power unit fail to function properly, refer to the Troubleshooting thePXI-1000B section of Chapter 3, Maintenance.Remote Power Monitoring and Inhibiting InterfaceThe PXI-1000B mainframe supports remote power monitoring andinhibiting via a 9-pin D-sub connector located on the rear panel. Table 2-2shows the pinout of the DB-9 connector.Table 2-1. Power Supply Voltages at Power Monitoring Connector (DB-9)Pin Supply Acceptable Voltage Range2 +5 V 4.75 to 5.25 V4 +3.3 V 3.135 to 3.465 V6 +12 V 11.4 to 12.6 V8 –12 V –12.6 to –11.4 V1, 9 Logic Ground N/ATable 2-2. DB-9 Connector PinoutDB-9 Pin Signal1 Logic Ground2 +5 V3 Inhibit Return (DC-capable supply only)4 +3.3 V
