Appendix e connection to rs-422 – RAD Data comm ASM-20 User Manual
Page 67
E-1
Appendix E
Connection to RS-422
describes how to connect ASM-20 (EIA 530) to a RS-422 (V.36) DTE.
Table E-1. Interface List for Connecting ASM-20 (RS- 530) to RS-422 (V.36) DTE
Signal Function
RS-449 (RS-422/423)
37 Pins
EIA 530
DB-25 Female Standalone and Frame
Pin
Circuit
Pin
Circuit
Protective Ground
1
Shield
1
Signal Ground
19
SG
7
AB
DTE Common Return
37
SC
DCE Common Return
20
RC
Transmitted Data
4
SD (A)
22 SD
(B)
2 BA
(A)
14 BA
(B)
Received Data
6
RD (A)
24 RD
(B)
3 BB
(A)
16 BB
(B)
Request to Send
7
RS (A)
25 RS
(B)
4 CA
(A)
19 CA
(B)
Clear to Send
9
CS (A)
27 CS
(B)
5 CB
(A)
13 CB
(B)
Data Set Ready
11
DM (A)
29 DM
(B)
6 CC
(A)
22 CC
(B)
Data Terminal Ready
12
TR (A)
30 TR
(B)
20 CD
(A)
23 CD
(A)
Carrier Detect
13
RR (A)
31 RR
(B)
8 CF
(A)
10 CF
(B)
External Transmit Clock
17
TT (A)
35 TT
(B)
24 DA
(A)
11 DA
(B)
Transmit Clock
5
ST (A)
23 ST
(B)
15 DB
(A)
12 DB
(B)
Receive Clock
8
RT (A)
26 RT
(B)
17 DD
(A)
9 DD
(B)
Local Analog Loopback
10
LL
18
LL
Remote Loopback
14
RL
21
RL
Test Indicator
18
TM
25
TM