[TCUG] Re: Lamp Monitoring of LED Heads on Siemens RMS
- From: "Morar Jag \(ST\)" <Jag.Morar@xxxxxxxxxx>
- To: <tcug@xxxxxxxxxxxxx>
- Date: Fri, 18 Jul 2008 16:23:03 +0100
Further to my earlier email, so that the user community is well
informed, I have been advised that TSEU have developed a new
Intelligent Lamp Monitor unit (I2LM) that is capable of monitoring their
CLS optics (both LV and ELV). I understand that this is being utilised
in the LED roll out project in Kent.
The I2LM is capable of doing both safety red monitoring as well general
aspect monitoring and outputs (volt free contacts) to the controller or
a remote monitoring outstation.
It should be noted that 3rd part LED signals have not been characterised
yet so the I2LM can only be used with TSEU signals.
Jag
-----Original Message-----
From: tcug-bounce@xxxxxxxxxxxxx [mailto:tcug-bounce@xxxxxxxxxxxxx] On
Behalf Of Morar Jag (ST)
Sent: 18 July 2008 13:48
To: tcug@xxxxxxxxxxxxx
Subject: [TCUG] Re: Lamp Monitoring of LED Heads on Siemens RMS
Robert,
The Siemens RMS lamp monitoring is designed for conventional lamp
monitoring through the torroids at the phase outputs. Conventional
current monitoring of 240v LED optics at the controller is difficult, if
not impossible, due to the very low and irregular current profile and
harmonics from the switched mode supply. This is probably why TSEU
provide sense wiring from the monitoring that is done directly on the
optic. However, I also suspect the OMU does not have software that is
designed to report lamp faults using such inputs.
However, I believe lamp current monitoring of LED aspects should become
easier when we move to ELV operation - as see on the Siemens ST900 ELV
controller.
Jag Morar=3D20
Transport for London
Directorate of Traffic Operations
25 Eccleston Place=3D20
London=3D20
SW1W 9NF=3D20
0207126 2754=3D20
Please note my new email address: jag.morar@xxxxxxxxxx=3D20
-----Original Message-----
From: tcug-bounce@xxxxxxxxxxxxx [mailto:tcug-bounce@xxxxxxxxxxxxx] On
Behalf Of Robert Mansell
Sent: 17 July 2008 15:41
To: tcug@xxxxxxxxxxxxx
Subject: [TCUG] Lamp Monitoring of LED Heads on Siemens RMS
When installing a Siemens RMS OMU into a non-Siemens controller, you
would normally fit torroids to perform lamp monitoring. Our new sites
are now installed with LED signals, has anyone any experience of how RMS
copes with monitoring LEDs? Specifically, we have Microsense LED Signal
Heads, the type that use a sense wire for monitoring the reds, the newer
3G TSEU signal heads and also Peek Elite LED.
Thanks
Robert Mansell
The City of Edinburgh Council
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