Comtech EF Data SDM-650B - Manual (Page 54)

Configuration SDM-650B Satellite Modem
3–12 Rev. 5
3.2.1.2 Connector Pinouts
The RS-422 and MIL-STD-188-114 interface is provided on a 37-pin female D
connector, accessible from the rear panel of the modem. Screw locks are provided for
mechanical security of the mating connector.
Signal Function Name Pin #
SIGNAL GROUND SG 1, 19, 20, 37
SEND DATA SD-A
SD-B 4
22
SEND TIMING ST-A
ST-B 5
23
RECEIVE DATA RD-A
RD-B 6
24
REQUEST TO SEND RS-A
RS-B 7
25
RECEIVER TIMING RT-A
RT-B 8
26
CLEAR TO SEND CS-A
CS-B 9
27
DATA MODE DM-A
DM-B 11
29
RECEIVER READY RR-A
RR-B 13
31
TERMINAL TIMING TT-A
TT-B 17
35
MOD FAULT − 3
DEMOD FAULT − 21
MASTER CLOCK
(INPUT) MC-A
MC-B 16
34