Pin
Signal Name
Signal Description
5
GND
Ground reference
6
RED RETURN
Ground reference
7
GREEN RETURN
Ground reference
8
BLUE RETURN
Ground reference
9
PWR
5 V power for DDC
10
GND
Ground return for power
11
NC
No connect
12
DDC_D
Data signal of serial communication
13
HSYNC
Horizontal synchronization signal
14
VSYNC
Vertical synchronization signal
15
DDC_C
Clock signal of serial communication
Digital I/O
The 44-pin Digital I/O port on the IC-3120 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-3120.
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.
8
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IC-3120 User Manual
