Chapter 2 Installation and Configuration
© National Instruments Corporation 2-9 NI PXI-1056 User Manual
There are six dual-color LED indicators on the front panel of the chassis.
Four of the LEDs indicate the status of voltage supply regulation (+3.3 V,
5V, +12V, –12V). The FAN LED indicates the operational status of the
fan. The TEMP LED indicates whether the chassis is maintaining a proper
operating temperature, or whether there is an over-temperature condition.
The operating temperature of the chassis should not exceed 60 °C.
Remote Voltage, Temperature, and Fan Monitoring
The PXI-1056 chassis supports remote voltage, temperature, and fan
monitoring through a RS-232 9-pin D-sub connector located on the rear
panel. Table 2-1 shows the pinout of the 9-pin D-sub connector.
Caution Use the rear-panel 9-pin D-sub connector to connect to an RS-232-capable
device. Do not use the connector to supply power to external devices, or damage to the
chassis may result.
Table 2-1. Voltage Monitoring Connector Pinout
D-sub Pin Signal
1Ground
2Receive data input
3Request to send, input
4Transmit data, output
5Clear to send, output
6Reserved
7Reserved
8Reserved
9Reserved
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