copyright © siemens plc 2009. all rights reserved. siemens cls led signal retrofit
TRANSCRIPT
Copyright © Siemens plc 2009. All rights reserved.
Siemens CLS LED signal retrofit
Page 2 November-09 Traffic Solutions
Content
LED signal retrofit
Introduction Background Standard Siemens LED signal
The Siemens retrofit solution Scope Benefits Specific site examples Availability and typical pricing
Questions
Page 3 November-09 Traffic Solutions
Background
For new installation ELV is usually the best solution
Will deliver greater safety, lower installation costs and reduced carbon footprint compared to LV
However, there are thousands of sites already installed using LV incandescent signals
Much of this installed equipment is still serviceable
The cost of mass upgrade to ELV may be difficult to justify
The Siemens LED signal retrofit offers a cost effective solution to achieving lower running costs and reduced carbon footprint on many incandescent sites
Page 4 November-09 Traffic Solutions
Helios CLS with LMF
Standard Siemens CLS LED signal
Helios CLS with Lamp Monitoring Facility (LMF)
Benefits: Robust Helios signal body SIRA high phantom lens Lamp monitoring compatibility
with all Siemens controllers Reduced power compared with
HI signals
CLS Module
LMF Module
Page 5 November-09 Traffic Solutions
How does the LMF work?
Controller lamp monitoring typically uses the current consumed by a signal to indicate if it is on
Most existing controllers are designed to monitor incandescent lamps
Current is sinusoidal and predictable
Of sufficient value to be easily measured
To simplify hardware and software current is measured at defined points in the supply voltage waveform.
Lamp supply voltage
Current monitoring of incandescent lamps
Lamp supply current
Typical current measurement points
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How does the LMF work?
LED signal currents are much lower than for incandescent lamps
Current waveforms are often poor and difficult to predict, particularly as the supply voltage changes
Cannot be monitored by standard controllers
The LMF is a highly intelligent unit which adds a current pulse to satisfy the controllers expectations
Should the LED module (or LMF) fail, all current is removed so that the controller can sense the signal failure
Lamp supply voltage
Current monitoring of LED signals
Typical current measurement points
LED supply current
Page 7 November-09 Traffic Solutions
Helios CLS with LMF
Standard Siemens CLS LED signal
Helios CLS with Lamp Monitoring Facility (LMF)
Benefits: Robust Helios signal body SIRA high phantom lens Lamp monitoring compatibility with
all Siemens controllers Reduced power compared with HI
signals
Disadvantages Integral LMF adds significant cost LMF raises power consumption
above basic CLS LED levels Complicates retrofit on-street
CLS Module
LMF Module
Page 8 November-09 Traffic Solutions
The Siemens LED retrofit - Overview
Provides effective retrofit kits for existing incandescent signals
Helios Peek Elite
Eliminates the need for the LMF unit but retains full lamp monitoring facilities
Reduces cost Reduces power consumption
Is fully compatible with ST800 and ST900 intersection controllers
Page 9 November-09 Traffic Solutions
Helios CLS (retrofit)
The Siemens LED retrofit – Realised benefits
Reduced power compared with HI signals and standard Helios CLS
Fully RLM compatible and meets the timing requirements of TR2210 and TR2500
Can usually be added to existing controllers without re-configuration
Retains excellent optical performance delivered by Siemens Helios signals
Protects investment in existing installed infrastructure
Updated CLS Module
LMF Module no longer needed
Retrofit modules supplied complete with new door, lens and hoods
• Minimises installation time
• Ensures best possible optical performance
Page 10 November-09 Traffic Solutions
The Siemens retrofit in detail
New retrofit LED modules in signal body doors for:
Siemens Helios Peek Elite
Replacement lamp switch cards
Retrofit upgrade kit for ST800 and ST900 controllers
ST800 Firmware (PB800 issue 26*)
Filter kit
ST900 Firmware (PB801 issue 8*)
(PB815 issue 4*)
(*or later version)
Page 11 November-09 Traffic Solutions
Detailed implementation considerations
The retrofit covers most ST800 and ST900 (LV) sites fitted with Helios or Peek Elite signal heads
This retrofit facility is not available on the ST700, ST750 ST800P or any 30A controller sites
Generally it is not necessary to re-configure the controller
Changes to lamp monitoring implemented by handset command
The number of signals that can be driven on each phase is less than standard controllers
Signal Type Number of signals per phase
Helios CLS (NLM) Includes Vehicle and far-side Ped & Cycle Signals
8
Incandescent / Filament lamps 4*
Helios LED (old style LED) 4*
Helios CLS+LMF 4*
LED Near-Side Puffin / Toucan
LED Demand Indicators
LED Wait Indicators
These signals cannot be lamp monitored, but the
number of driveable signals is the same as for
standard controllers.
* For pedestrian signals with Wait indicators, this limit of 4 signals would normally consist of two reds and two waits.
Page 12 November-09 Traffic Solutions
Deciding which signals to upgrade
Vehicle Signals:
Helios Incandescent: Simple upgrade, subject only to a limit of 8 signals per phase.
Helios LED*: Simple upgrade, subject only to a limit of 8 signals per phase.
Helios CLS + LMF: Simple upgrade, subject only to a limit of 8 signals per phase.
Pedestrian Signals:
Near-Side Pedestrian Signals: No need to upgrade – already LED based and should left in place. These units cannot be lamp monitored by any existing or new LV controllers.
Far-Side Pedestrian Signals: The upgrade options are more complex and are determined by the presence of wait indicators and the desire to lamp monitor them.
* Old style with many discrete LEDs:
Lamp monitoring considerations influence the possible upgrade paths
Page 13 November-09 Traffic Solutions
Deciding which signals to upgrade – Pedestrian options
Option 1: Upgrade the red and green men and fit LED wait lamps.
In this arrangement lamp monitoring of the waits is not possible, and neither is monitoring of the pedestrian red whilst the wait signal is illuminated.
LED wait lamps are not monitorable by the controller, but offer low lower power consumption and reduced maintenance compared to their incandescent equivalents.
Option 2: Upgrade the red and green men and continue to use incandescent wait lamps.
Without re-configuration lamp monitoring of the waits is not possible, and neither is monitoring of the pedestrian red whilst the wait lamps are illuminated.
However reconfiguring the controller and the use of external toroidal current sensors will remove these limitations if lamp monitoring of the incandescent waits is still required
* Old style with many discrete LEDs:
Page 14 November-09 Traffic Solutions
Deciding which signals to upgrade – Pedestrian options
Option 3: Where only far sides signals and two incandescent waits are present, replace the Helios incandescent signals with Helios CLS + LMF.
In this arrangement lamp monitoring of both the LED signals and incandescent waits is possible without re-configuring the controller (as they both continue to look like incandescent signals to the controller!).
This is not a preferred option as it means a mix of standard Helios CLS + LMF and Helios NLM signals on the same site.
However it provides a solution where monitoring incandescent wait indicators is desired and a controller reconfiguration is not desired.
If the site to be upgraded has other signal arrangements, upgrade may still be possible with a controller re-configuration. Full details of all the possible signal
upgrade options that can be attained are to be found in section 5 of the product handbook (667/HB/32921/007).
Page 15 November-09 Traffic Solutions
The Siemens retrofit – potential power savings
Average power
Saving v High Intensity signals
21W
50%
8W
80%
9W
78%
Indicative power consumptions
Helios CLS(with LMF)
Helios ELVHelios CLSRetrofit (2)
Estimated annual power saving 2121 KWh 4242 KWh 8970 KWh
Typical Junctions annual power saving – compared with High Intensity signals
Small site – 7x 3 aspect heads, 2 x single aspect arrows
Medium site – 14 x 3 aspect heads, 4 x single aspect arrows
Large site – 30 x 3 aspect heads, 6 x single aspect arrows
4 Phase 8 Phase 12 Phase
Approximate annual carbon saving 1.2 Tonnes 2.3 Tonnes 4.8 Tonnes
Page 16 November-09 Traffic Solutions
Calculating your own power savings
Calculating site power savings is easy with a simple spreadsheet tool.
Also provides an indication of annual carbon savings
HI signals LED retrofit3 aspect 42 Annual power consumption (KW/h) 19981 43862 aspect 12 Annual carbon contribution (Tons) 10.79 2.37Single aspect 5
Power(KW/h)
Carbon(Tons)
Dimming in use (Y/N) Y 15595 8.42
Power cost(pence per unit) 12 Annual power cost savings
Siemens LV retrofit power / carbon saving calculator
£1,871
Enter number of HI signals to be replaced
Power and carbon savings
Overall annual savings
Page 18 November-09 Traffic Solutions
Availability and pricing
Helios retrofit modules are available immediately
Peek Elite retrofit modules will be available from March 2010
Installed price typically around £375*
Volume discounts achievable
5 year warranty
ST900 LED controller available which will directly drive and monitor Helios LED signals without LMF modules
For site / scheme specific pricing talk to your Regional Sales Manager
* 3 Aspect Signal
Page 19 November-09 Traffic Solutions
Summary
The Helios retrofit solution offers options for cost effective LED retrofits into existing signal heads
Uses high quality LED modules and signal head components
Offers significant power savings and carbon footprint reductions compared with traditional incandescent signals
Is fully RLM compatible Meets the requirements of
TR2210 and TR2500
Page 20 November-09 Traffic Solutions
Summary
Questions……..
Copyright © Siemens plc 2009. All rights reserved.
Siemens CLS LV LED signal retrofit