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Chapter 2 Connecting Signals
NI PXI-4224 User Manual 2-2 ni.com
Caution The PFI 0/CAL SMB connector is for low-voltage timing and calibration signals
only. Voltages greater than ±15 V can damage the device.
If you are building a 25-pin D-SUB connector for your application, make sure you use a
connector and wires that are safety rated for the voltage and category of the signals in your
application.
Table 2-1. NI PXI-4224 25-Pin D-SUB Terminal Pin Assignments
Front Connector
Diagram
Pin Number Signal Names Pin Number Signal Names
*
NC—No Connection
14 AI 0 – 1 AI 0 +
15 AI 1 – 2 AI 1 +
16 AI 2 – 3 AI 2 +
17 AI 3 – 4 AI 3 +
18 AI 4 – 5 AI 4 +
19 AI 5 – 6 AI 5 +
20 AI 6 – 7 AI 6 +
21 AI 7 – 8 AI 7 +
22 No Pin 9 No Pin
23 NC
*
10 D GND
24 SPI CLK 11 MISO
25 SELECT 12 MOSI
N/A N/A 13 +5 V
14 15 16 17 18 19 20 21 22 23 24 25
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