Manual

99
Appendix
RS-422 connector
A.4 RS-422 Connector (optional)
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