RS-449
C–23
Table C–14. DTE RS-449 Pin Assignments
MCS
Network
26-Pin
Description
Function
37-Pin
1
Protective ground
FG
1
2
Receive data A
RD (A)
6
11
Receive data B
RD (B)
24
3
Send data A
SD (A)
4
12
Send data B
SD (B)
22
4
Receiver ready A
RR (A)
13
13
Receiver ready B
RR (B)
31
6
Terminal ready A
TR (A)
12
15
Terminal ready B
TR (B)
30
7
Signal ground
SG
19
8
Request to send A
RTS (A)
7
17
Request to send B
RTS (B)
25
9
Data mode A
DM (A)
11
18
Data mode B
DM (B)
29
10
Pins 10 and 16 are jumpered together on the 26-pin connector.
16
21
KG encryption A
LOS (A)
3
22
KG encryption B
LOS (B)
21
23
Receive timing A
RT (A)
8
24
Receive timing B
RT (B)
26
25
Send timing A
ST (A)
5
26
Send timing B
ST (B)
23
