Controller Load, Power Consumption And Lamp Supply Transformer Selection - Siemens ST950 Handbook

4.10 Controller Load, Power Consumption and Lamp Supply
Transformer Selection
This section describes the method used to determine that the controller can supply the
total lamp load required, how to select whether one or two lamp supply transformers
are required, and how to determine the overall power used for estimation of site
running costs.
In order to do this, the power taken by the lamps needs to be calculated. Use the
following table to determine the average power taken by the different types of lamps.
The controller Elexon codes for Siemens products are defined in the Siemens Elexon
Codes document 667/RE/29050/000.
Siemens ELV Regulatory Sign
Siemens Helios ELV (Vehicular or Far-Side Ped Signals)
Siemens LED Wait Indicator (for Far-Side Ped Signals)
Siemens Red/Green Nearside Signals
Siemens Ped Demand Indicator (for Near-Side Signals)
4.10.1 ELV Controller Load
Detector power requirements are as follows:
Siemens SLD4 detectors require 1.5W per unit.
Siemens ST4R/ST4S detectors require 2.4W per unit.
Siemens WiMag Loop detector replacement cards require 23W per unit. (Fully
loaded)
Sarasota MTS36Z (2 channel) or MTS38Z (4 channel) detectors require 3W per
unit. (N.B. The power consumption is the same for both 2 and 4 channel units.)
Microsense detectors require 6W per unit.
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Copyright © Siemens plc 2015. All Rights Reserved.
Hardware Fail Flash flashes all the signals on LSLS #1 and extinguishes
all the signals on the other LSLS cards, so at least two LSLS cards are
required. The IC4 Configurator automatically locates the outputs that are
required to flash on to the first LSLS card.
Table 8 – ST950 ELV 48V Lamp Load (Watts)
Unrestricted
4
Paul Cox
ST950 General Handbook
Mobility Division, Traffic Solutions
Sopers Lane, Poole, Dorset, BH17 7ER
Bright
48V
7 W
12 W
7 W
18 W
6 W
Page 45 of 107
Status Issued
Date 16-Jul-2015
Document No. 667/HB/46000/000
Mobility is a division of Siemens Plc
Dim
27.5V
Not
Dimmed
4 W
2.5 W
3 W
1.2 W