Table 3 – St950 Lamp Drive Capability - Siemens ST950 Handbook

Maximum lamp current that a normal
ST950 controller can supply excluding
regulatory signs and short-term
illumination, i.e. red/amber.
Maximum lamp current that an
ST950LED can supply including short-
term illumination, i.e. red/amber, but
excluding Regulatory Signs.
Also see note 1
Maximum lamp load for one 8-Phase
Driver card (including red/amber).
Also see note 1
Maximum current for each four phase
group (e.g. phases A to D) for controllers
not wired for hardware fail flash. Also see
note 2
Maximum current for all green aspects on
one 8-Phase Driver card wired for
hardware fail flash. Also see note 2
Maximum current for all red and amber
aspects on one 8-Phase Driver card
wired for hardware fail flash.
Also see note 2
Maximum load for one triac output on a
Phase Driver card. Also see note 3
Maximum supply for regulatory signs
(assuming 76 volt-amps per sign)
Maximum supply for LED regulatory signs
assuming Helios LED (LV).
Also see note 4
Table 3 – ST950 Lamp Drive Capability
1
- Tungsten Halogen loads High Intensity – Generic – 63W
2
- LED loads are Helios CLS – 667/1/31500/9xx – 12W
Security classification Unrestricted
Version 4
Last Editor Paul Cox
Document Name ST950 General Handbook
Copyright © Siemens plc 2015. All Rights Reserved.
Mobility Division, Traffic Solutions
Sopers Lane, Poole, Dorset, BH17 7ER
Max Max No. of
Current Power Halogen
(Amps) (Watts) aspects
20A 4600W
10A 2300W
20A 4600W
10A 2300W
10A 2300W
10A 2300W
4A 920W
30 Reg.
10A 2300W
60 Reg.
10A 2300W
Page
Status
Date
Document No.
Mobility is a division of Siemens Plc
No. of LED
2
aspects
1
73 N/A
N/A 191
191
Limited by
73
Monitoring
Note 5
36 191
36 191
36 191
14 61
30 Reg.
Signs Signs
60 Reg.
Signs Signs
28 of 107
Issued
16-Jul-2015
667/HB/46000/000