1. Siemens CLS LED signal retrofit

2. Content LED signal retrofit Introduction Background
Standard Siemens LED signal
The Siemens retrofit solution
Scope
Benefits
Specific site examples
Availability and typical pricing
Questions

3. 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

4. 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
Helios CLS with LMF
LMF Module
CLS Module
12 digit unique access code

5. Current monitoring of incandescent lamps
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

6. Current monitoring of LED signals
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
Current monitoring of LED signals
Lamp supply voltage
Typical current measurement points
LED supply current

7. 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
Helios CLS with LMF
LMF Module
CLS Module
12 digit unique access code

8. 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

9. 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
Helios CLS (retrofit)
LMF Module no longer needed
Updated
CLS Module
12 digit unique access code
Retrofit modules supplied complete with new door, lens and hoods
Minimises installation time
Ensures best possible optical performance

10. 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)

11. 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
* For pedestrian signals with Wait indicators, this limit of 4 signals would normally consist of two reds and two waits.

12. Deciding which signals to upgrade
Lamp monitoring considerations influence the possible upgrade paths
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:

13. 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:

14. 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).

15. The Siemens retrofit – potential power savings
Indicative power consumptions
Helios CLS
(with LMF)
Helios ELV
Helios CLS
Retrofit (2)
Average power
21W 8W 9W
Saving v High Intensity signals
50%
80%
78%
Typical Junctions annual power saving – compared with High Intensity signals
Large site – 30 x 3 aspect heads, 6 x single aspect arrows
Medium site – 14 x 3 aspect heads, 4 x single aspect arrows
12 digit unique access code
Small site – 7x 3 aspect heads, 2 x single aspect arrows
4 Phase
8 Phase
12 Phase
Estimated annual power saving
2121 KWh
4242 KWh
8970 KWh
Approximate annual carbon saving
1.2 Tonnes
2.3 Tonnes
4.8 Tonnes

16. Calculating your own power savings
Calculating site power savings is easy with a simple spreadsheet tool.
Also provides an indication of annual carbon savings

17. Funding options
12 digit unique access code

18. 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

19. 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

20. Summary
Questions……..

21. Siemens CLS LV LED signal retrofit