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Table 5. USB3 Vision Connector Signals (Continued)
Pin
Signal Name
8
StdA_SSTX-
9
StdA_SSTX+
Digital I/O Port
The 44-pin Digital I/O port on the NI CVS-1459 offers 8 isolated inputs, 8 isolated outputs, 2
bidirectional differential I/O (RS-422) or single ended input lines which can be used with a
quadrature encoder, and 8 bidirectional TTL lines. The Digital I/O port can be connected to
any appropriate shielded device or connector block using a shielded cable. Refer to the
following image and table for pin locations and functions.
Pin Number
Signal
1
Diff 0+
2
GND
3
TTL 0
4
TTL 1
5
GND
6
TTL 2
7
TTL 3
8
GND
SuperSpeed transmitter differential pair
Figure 9. 44-pin Digital I/O Connector
44
31
Table 6. Digital I/O Pin Descriptions
Bidirectional RS-422 I/O (positive side), or quadrature encoder
phase A+
Digital ground reference for TTL and differential I/O
Bidirectional TTL I/O
Bidirectional TTL I/O
Digital ground reference for TTL and differential I/O
Bidirectional TTL I/O
Bidirectional TTL I/O
Digital ground reference for TTL and differential I/O
Signal Description
30
15
16
1
Description
NI CVS-1459 User Manual | © National Instruments | 9
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