Comtech EF Data SMS-451 - Manual (Page 39)

SMS-451 Satellite Switch Revision 0
Installation MN/SMS451.IOM
2-13
2.3.2.2 Remote Connector
The Remote interface is provided on a 25-pin female D connector. The Remote connector
provides interface to the switch for remote control and online/offline status of the switch.
The Local/Remote toggle switch on the front panel must be set to Remote mode in order
to control the switch from this input. Status is available regardless of the position of the
Local/Remote toggle switch. Screw locks are provided for mechanical security of the
mating connector.
Signal Function Name Pin #
DEMOD SWITCH STATUS NO(B)
NC(A)
COM
8
7
15
MOD SWITCH STATUS NO(B)
NC(A)
COM
6
5
13
CONTROL MOD REMOTE MR(A)
MR(B)
GND
4
3
14
CONTROL DEMOD REMOTE DR(A)
DR(B)
GND
2
1
9
MODE STATUS COM 18
LOCAL NO 16
REMOTE NC 17
REMOTE STATUS NO(B) 19
DN/CONV SWITCH NC(A)
COM
20
21
REMOTE CONTROL DC(A) 22
DOWN/CONVERTER DC(B) 23
GROUND GND 24
Note: A closure between the “COM” and “NC” indicates that the “A” unit is online.
An external connection between “GND” and “MR(A)” will force the “A” modulator
online. Pins 19 through 23 are reserved for converters and are not used on the switch.