Table 2.
Ethernet Port Pin Descriptions (Continued)
Pin
Fast Ethernet (100 Mbps)
Gigabit Ethernet
MDI
MDI-X
6
RX-
BI_DB-
BI_DA-
7
No Connect
BI_DD+
BI_DC+
8
No Connect
BI_DD-
BI_DC-
Digital I/O
The 44-pin Digital I/O port on the IC-3173 offers 8 isolated inputs, 8 isolated outputs, 2
bidirectional differential inputs (RS-422) or single-ended input lines that 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.
NI recommends the following digital I/O cables for the IC-3173.
Cable
Part Number
44-pin D-sub male to pigtail cable
156083-03 for 3 meter cable
44-pin D-sub male to 44-position D-sub female cable
156084-03 for 3 meter cable
156084-0R5 for 0.5 meter cable
Refer to the following image and table for pin locations and descriptions.
Figure 4.
44-pin Digital I/O Connector Pin Locations
15
30
44
1
16
31
Table 3.
Digital I/O Pin Descriptions
Pin Number
Signal
Description
1
Diff 0+
Bidirectional RS-422 I/O (positive side), or quadrature encoder
phase A+
2
GND
Digital ground reference for TTL and differential I/O
6
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IC-3173 User Manual
