Comtech EF Data SMS-301 - Manual (Page 27)

SMS-301 Redundancy Switch Installation
Rev. 3 2–5
2.3.1 Remote Switch Control (J1) (RS-301 Option)
For applications using the Remote Switch (RS-301) option, the connector type is a
37-pin D subminiature. Refer to Table 2-3 for the 37-pin connector pin assignments.
Table 2-3. Switch Control Interface Signals
Pin No. Name Function
1 SCL Serial Clock
20 SDA Serial Data
2 Spare 11 No Connection
21 Spare 10 No Connection
3 Spare 9 No Connection
22 Spare 8 No Connection
4 Spare 7 No Connection
23 Spare 6 No Connection
5 Spare 5 No Connection
24 Spare 4 No Connection
6 Spare 3 No Connection
25 Spare 2 No Connection
7 Spare 1 No Connection
26 DMDONL Demod Online
8 MODONL Mod Online
27 /B_DF Modem B Demod Fault
9 /A_DF Modem A Demod Fault
28 /B_MF Modem B Mod Fault
10 /A_MF Modem A Mod Fault
29 ID_5 Interface Board ID
11 ID_4 Interface Board ID
30 ID_3 Interface Board ID
12 ID_2 Interface Board ID
31 ID_1 Interface Board ID
13 GND Ground
32 GND Ground
14 GND Ground
33 GND Ground
15 GND Ground
34 -12V -12VDC
16 -12V -12VDC
35 +12V +12VDC
17 +12V +12VDC
36 +5V +5VDC
18 +5V +5VDC
37 +5V +5VDC
19 +5V +5VDC