Table 1. Pin Assignments and Signal Descriptions (Continued)
Pin Signal Name
Description
3
Diff 0+
Bidirectional RS-422 I/O positive connection, or quadrature encoder
phase A+. Can also be used as active-high single-ended input
4
Diff 0-
Bidirectional RS-422 I/O positive connection, or quadrature encoder
phase A-. Can also be used as active-low single-ended input
5
TTL I/O 4
TTL-compatible Digital I/O or external trigger
6
TTL I/O 1
TTL-compatible Digital I/O or external trigger
7
TTL I/O 2
TTL-compatible Digital I/O or external trigger
8
Iso Input 1+
24 V-compatible isolated current sinking digital input
9
Diff 1+
Bidirectional RS-422 I/O positive connection, or quadrature encoder
phase B+. Can also be used as active-high single-ended input
10 TTL I/O 3
TTL-compatible Digital I/O or external trigger
11
Digital Ground Digital Ground reference for quadrature encoder inputs and TTL I/O
12 Iso Input 0-
Iso Input 1-
Common Ground reference for isolated digital inputs
13 Diff 1-
Bidirectional RS-422 I/O positive connection, or quadrature encoder
phase B-. Can also be used as active-low single-ended input
14 Digital Ground Digital Ground reference for quadrature encoder inputs and TTL I/O
15 TTL I/O 5
TTL-compatible Digital I/O or external trigger
Base Camera Link SDR Connector
DGND
X(0)+
X(1)+
X(2)+
XCLK+
X(3)+
SerTC–
CC(1)+
CC(2)–
CC(3)+
CC(4)–
DGND/12 V
DGND/12 V
X(0)–
X(1)–
X(2)–
XCLK–
X(3)–
SerTC+
SerTFG–
CC(1)–
CC(2)+
CC(3)–
CC(4)+
DGND
13
12
11
10
9
8
7
6
5
4
3
2
1
26
25
24
23
22
21
20
19
18
17
16
15
14
10
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NI PCIe-1477 Getting Started Guide