External connections, Esc-1 interface j1 – Comtech EF Data SMS-451 User Manual
Page 55

SMS-451T 1:1 ESC Protection Switch
Revision 0
B-141-1 Interface Breakout Panel
MN/SMS451.IOM
A–3
A.2 External
Connections
A.2.1
ESC-1 Interface J1
The ESC-1 interface is provided on a 50-pin female D connector accessible from the rear
of the breakout panel. Screw locks are provided for mechanical security of the mating
connector.
Signal Function
Name
Pin #
GROUND GND
1,
2
1KHZ TX OCTET
TXO-A
TXO-B
4
5
8KBIT TX DATA
TXD-A
TXD-B
37
38
8KHZ TX CLOCK
TXC-A
TXC-B
21
22
1KHZ RX OCTET
RXO-A
RXO-B
6
7
8KBIT RX DATA
RXD-A
RXD-B
39
40
8KHZ RX CLOCK
RXC-A
RXC-B
23
24
BACKWARD ALARM OUTPUT 1
BWO1-C
BWO1-NO
BWO1-NC
8
41
25
BACKWARD ALARM OUTPUT 2
BWO2-C
BWO2-NO
BWO2-NC
9
42
26
BACKWARD ALARM OUTPUT 3
BWO3-C
BWO3-NO
BWO3-NC
10
43
27
BACKWARD ALARM OUTPUT 4
BWO4-C
BWO4-NO
BWO4-NC
11
44
28
BACKWARD ALARM INPUT
BWI-1
BWI-2
BWI-3
BWI-4
12
13
14
15
ADPCM 1 AUDIO IN
A1I-A
A1I-B
45
29
ADPCM 1 AUDIO OUT
A1O-A
A1O-B
46
30
ADPCM 2 AUDIO IN
A2I-A
A2I-B
47
29
ADPCM 2 AUDIO OUT
A2O-A
A2O-B
48
32
DEMOD FAULT RELAY
DF-COM
DF-NO
16
50
DEFERRED MAINTENANCE ALARM
DMA
17