Siemens ST950 Handbook page 33
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Also See for ST950:
- User manual (178 pages) ,
- Handbook (154 pages) ,
- Installation method statement (14 pages)
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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).
8
Table 3 - Double Stacked 10W IDC- Top: Modem Power + Monitors, Bottom:
EFC Modem
Location
Pin
Top
1
2
3
4
5
6
7
8
9
10
Bottom
11
12
13
14
15
16
17
18
19
20
Functions:
Modem 5V Supply (1,2 & 3,4) – This output provides a regulated 5V supply with
active current limiting set at approximately 700mA. This supply output is NOT
battery backed.
Isolated Shutdown Output (5,6) – These two pins provide an opto-isolated controller
shutdown signal. The + signal is the collector and the – signal is the emitter of the
opto transistor. The output is active low (ie low impedance) when the controller is in
the shutdown state. The maximum current that this output can pass is 25mA and
suitable external devices must be employed to ensure that this figure is not
exceeded otherwise damage to the ST950 board will occur.
Digital External Supply Monitor (7,8) – For future use.
Security classification
Unrestricted
Version
5
Last Editor
Neil Atkinson
Document Name
ST950 ICM Handbook
Copyright © Siemens Mobility Limited 2018. All Rights Reserved.
Function
Modem +5V DC fused output from MDU/LPU (not battery backed)
Connected to pin 1
Modem 0V DC output (+5V return)
Connected to pin 3
Isolated Shutdown O/P +
Isolated Shutdown O/P -
External supply monitor signal (digital)
External supply monitor signal return (0V)
External supply monitor signal (analog)
External supply monitor signal return (0V)
RS232 DCD (Input)
RS232 DSR (Input)
RS232 RxD (Input)
RS232 RTS (Output)
RS232 TxD (Output)
RS232 CTS (Input)
RS232 DTR (Output)
RS232 RI (Input)
0V
Not Used
Intelligent Traffic Systems
Sopers Lane, Poole, Dorset, BH17 7ER
Page
33 of 125
Status
Issued
Date
18-Dec-2018
Document No.
667/HE/46950/000
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