Manual

58
Rev. 3
Appendix
RS-232 Cable DB-25 to DB-9 Translation
A.4 RS-232 Cable DB-25 to DB-9 Translation
All other pins on the DB-25 connector are unused. This is standard PC
modem cable wiring.
A.5 RS-422 Cable Wiring
DB-25 Pin DB-9 Pin
23
32
47
58
66
75
81
20 4
22 9
13X/18X
INSTRUMENT
EIA-53
0
DEVIC
E
13X/18X CONNECTOR EIA-530 CONNECTOR
RX+
(
PIN 2
)
TX+
(
PIN 14
)
TX+
(
PIN 3
)
TX-
(
PIN16
)
RX-
(
PIN 21
)
TWISTED PAIR
TWISTED PAIR
<TWISTED PAIR>
TX-
(
PIN 2
)
RX+
(
PIN 16
)
RX-
(
PIN 3
)
<TWISTED PAIR>
RX+
RX-
TX-
TX+
EARTH GROUND
(SHOWN FOR
REFERENCE ONLY;
CONNECTED TO
INSTRUMENT
CHASSIS AND TO
AC MAINS "EARTH"
CONDUCTOR)
SIGNAL GROUND
(SHOWN FOR
REFERENCE ONLY;
CONNECTED TO
INSTRUMENT RS-422
DRIVER/RECEIVER
CIRCUIT GROUND)
DB25 FEMALE
13
25
12
24
11
23
10
22
9
21
8
20
7
19
6
18
5
17
4
16
3
15
2
14
1
DB25 MALE
13
25
12
24
11
23
10
22
9
21
8
20
7
19
6
18
5
17
4
16
3
15
2
14
1