42
LDM-144LR
Appendix B: RS-422 Interfacing Pinout
Table B-1. LDM-144LR EIA 530 Pinout Connection (Digital Interface
to DTE RS-422 [V.36] DTE Interface).
Function
DTE RS-422/423 (RS-499)
LDM-144LR
37 Pin Connector
SD DB25 Female Connector
Pin
Circuit
Pin
Circuit
Protective Ground
1
Shield
1
Signal Ground
19, 37, 20
7
AB
Transmitted Data
4
SD (A)
2
BA (A)
22
SD (B)
14
BA (B)
Received Data
6
RD (A)
3
BB (A)
24
RD (B)
16
BB (B)
Request to Send
7
RS (A)
4
CA (A)
25
RS (B)
19
CA (B)
Clear to Send
9
CS (A)
5
CB (A)
27
CS (B)
13
CB (B)
Data Set Ready
11
DM (A)
6
CC (A)
29
DM (B)
22
CC (B)
Data Terminal Ready
12
TR (A)
20
CD (A)
30
TR (B)
23
CD (B)
Carrier Detect
13
RR (A)
8
CF (A)
31
RR (B)
10
CF (B)
