ST950S Plus+ Installation and Commissioning Manual
Reset fault log button (9,10) – This input allows an external push button to be used to reset major faults
in the fault log in the same manner as RFL=1 would do from the handset.
Bottom connector – Serial port used to connect an optional GPS unit (used to maintain the clock).
Table 20. Double Stacked 10W IDC
Pin
Function
1
Modem +5V DC fused output
from MDU/LPU (not battery
backed)
2
Connected to pin 1 above
3
Modem 0V DC output (+5V re
turn)
4
Connected to pin 3 above
5
Isolated Shutdown O/P +
6
Isolated Shutdown O/P -
7
External supply monitor signal
(digital)
8
External supply monitor signal
return (0V)
9
External supply monitor signal
(analog)
Top (Modem Power + Monitors)
10
External supply monitor signal
return (0V)
11
RS232 DCD (Input)
12
RS232 DSR (Input)
13
RS232 RxD (Input)
14
RS232 RTS (Output)
15
RS232 TxD (Output)
16
RS232 CTS (Input)
17
RS232 DTR (Output)
18
RS232 RI (Input)
19
0V
Bottom (EFC Modem)
20
Not Used
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