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226
A
PPENDIX
A: S
YSTEM
S
PECIFICATIONS
AND
P
ART
N
UMBERS
Table 24
Connector Pinouts for RS-449 DCE Cable (Part #3C63921)
Signal Name
Pin # on 60-pin
Connector
Pin # on DB-37
Connector
Direction (for
Serial Port)
Frame GND
46
1
Circuit GND
15, 16, 30
19, 20, 37
RTS
1, 2
7, 25
In
CTS
9, 10
9, 27
Out
DSR
7, 8
11, 29
Out
DCD
5, 6
13, 31
Out
DTR
3, 4
12, 30
In
LL (not used)
29
10
In
SD+
28
4
In
SD-
27
22
In
RD+
11
6
Out
RD-
12
24
Out
SCTE+
26
17
In
SCTE-
25
35
In
SCR+
24
8
Out
SCR-
23
26
Out
SCT+
13
5
Out
SCT-
14
23
Out
Shorting GR 1
48, 49