Siemens EH.75M.11. Spezifikationen PDF herunterladen (Seite 173)

T400 Controller Facilities Manual

667/EB/20200/000 Page 17-13 Issue 9

NOTE: Pedestrian demands from UTC or local link operate as on the Pelican

controller i.e. the demand does not require the kerbside detector to be active in order

to be registered and the demand is latched - not cleared when the kerbside timeout

period expires.

Kerbside Detector Test Output

One test output is provided for each Puffin stream. This output should be wired to

connect +24V through the ‘normally open’ relay contacts to the detector test input on

surface mounted kerbside detectors.

While there is no pedestrian demand registered, each detector is tested at 10 second

intervals. Note that the kerbside detector is tested during the pedestrian push button

hold time, providing that no demand is registered.

The test output is driven with a 400mS pulse by the controller and a check is made for

a detector response pulse. A missing or late response forces the detector active (within

the controller) and an entry is made in the fault log. A subsequent correct response

from the detector removes the force condition.

Detector testing is required with surface mounted detectors, but not with ‘above

ground’ detectors. Detector testing is enabled by default. Testing can be disabled by

de-allocating the corresponding detector test output.

NOTE: The test sequence results in a pulse appearing on the kerbside detector output.

This will be treated as a normal pedestrian presence, activating the kerbside hold and

timeout periods.

‘On-crossing’ Detector Inputs

Up to 4 inputs are available on each Puffin stream. The ‘on-crossing’ detector indicates

when there are pedestrians moving on the crossing and is used to extend the variable

clearance period on the move from pedestrian green to vehicle green.

Any configured ‘on-crossing’ detector remaining inactive during a cycle is assumed

faulty and forces the following variable clearance period to be extended up to its

maximum. An entry is also made in the fault log.

If the detector subsequently operates correctly, then the force is removed and normal

operation resumed.

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Siemens EH.75M.11. Spezifikationen Seite 173