42
SHM-768K
Appendix A: Connecting to RS-422
Table A-1. Interface List for Connecting SHM-768K to RS-422 (V.36)
DTE.
Signal Function
RS-449 (RS-422/423)
EIA 530
37 pins
DB25 Female
Standalone and Frame
Pin Circuit
Pin
Circuit
Protective Ground
1
Shield
1
Signal Ground
19, 37, 20
7
AB
Transmitted Data
4
SD(B)
2
BA(A)
22
SD(A)
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)
External Transmit
17
TT(A)
24
DA(A)
Clock
35
TT(B)
11
DA(B)
Transmit Clock
5
ST(A)
15
DB(A)
23
ST(B)
12
DB(B)
Receive Clock
8
RT(B)
17
DD(A)
26
RT(A)
9
DD(B)
