10
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NI CVS-1458 Getting Started Guide
23
GND
Digital ground reference for TTL and differential I/O
24
Diff 1-
Bidirectional RS-422 I/O (negative side), or quadrature
encoder phase B-
25
V
ISO
Isolated power voltage reference output
26
C
ISO
Common ground reference for isolated inputs and outputs
27
Iso Out 2
General purpose isolated output
28
Iso Out 3
General purpose isolated output
29
C
ISO
Common ground reference for isolated inputs and outputs
30
Iso Out 5
General purpose isolated output
31
Iso In 0
General purpose isolated input
32
Iso In 1
General purpose isolated input
33
C
ISO
Common ground reference for isolated inputs and outputs
34
Iso In 2
General purpose isolated input
35
Iso In 3
General purpose isolated input
36
C
ISO
Common ground reference for isolated inputs and outputs
37
Iso In 4
General purpose isolated input
38
Iso In 5
General purpose isolated input
39
C
ISO
Common ground reference for isolated inputs and outputs
40
Iso In 6
General purpose isolated input
41
Iso In 7
General purpose isolated input
42
C
ISO
Common ground reference for isolated inputs and outputs
43
Iso Out 6
General purpose isolated output
44
Iso Out 7
General purpose isolated output
Table 1.
Pin Location and Definition for the NI CVS-1458 Digital I/O (Continued)
Pin
Location
Pin
Number
S
ignal
De
s
cription
15
3
0
44
1
16
3
1
