Titan/cPCI User’s Manual, Connect Tech Inc.
Revision 1.01
15
Table 2: DB-37 cable connector pinouts
Pin
No.
Port
No.
RS-232
Signal
Direction
RS-422/485
Signal
Direction
1
1
SG
signal gnd
SR
signal ref
2 1 DTR
output
TxD-
output
3 1 TxD
output
TxD+
output
4 1 RxD
input
RxD-
input
5 1 DCD
input
RxD+
input
6 unused
unused
7 3 RI
input
RTS-
output
8 3 CTS
input
CTS+
input
9 3 RTS
output
RTS+
output
10 3 DSR
or +5V or +12V **
input CTS-
input
11 4 RI
input
RTS-
output
12 4 CTS
input
CTS+
input
13 4 RTS
output
RTS+
output
14 4 DSR
or +5V or +12V **
input CTS-
input
15
2
SG
signal gnd
SR
signal ref
16 2 DTR
output
TxD-
output
17 2 TxD
output
TxD+
output
18 2 RxD
input
RxD-
input
19 2 DCD
input
RxD+
input
20 1 RI
input
RTS-
output
21 1 CTS
input
CTS+
input
22 1 RTS
output
RTS+
output
23 1 DSR
or +5V or +12V **
input CTS-
input
24
3
SG
signal gnd
SR
signal ref
25 3 DTR
output
TxD-
output
26 3 TxD
output
TxD+
output
27 3 RxD
input
RxD-
input
28 3 DCD
input
RxD+
input
29
4
SG
signal gnd
SR
signal ref
30 4 DTR
output
TxD-
output
31 4 TxD
output
TxD+
output
32 4 RxD
input
RxD-
input
33 4 DCD
input
RxD+
input
34 2 RI
input
RTS-
output
35 2 CTS
input
CTS+
input
36 2 RTS
output
RTS+
output
37 2 DSR
or +5V or +12V **
input CTS-
input
** This option is jumper selectable on the
Titan/cPCI Rear I/O adapters only.
Cable Part Number:
CAB04DX
