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6.2 INSTALLATION OF THE RTM500 INTERFACE CARD
6.2.1 Controller cabinets typically support 3U rack space for the addition of loop
detector cards. Locate a space in the cabinet suitable for a 5HP (25mm) wide
Eurocard. Fit a backplane to this location and test fit the RTM500 interface
card to ensure that when it is inserted and aligned correctly, it engages fully
with the backplane connector. Fasten the backplane in position. Alternatively,
the RTM500 interface card can also be installed into Intelligent Backplanes.
6.2.2 Remove the RTM500 and connect the power from the controller to the
backplane, connect the loop feeder from the sensor location (the sensor
wiring pair is not polarity sensitive) and connect the wiring from the RTM500
output to the controller input. Where the installation is a replacement of an
existing loop, the feeder and output wiring will need to be moved from the
redundant channel on the loop detector card to the RTM500.
6.2.3 When all the RTM300 sensors have been installed and fitted, the RTM500
interface card can be inserted and the front panel screws that retain it can be
tightened.
7
TESTING
7.1 Set presence time switches P1 and P2 to the off (left) position for all unused
channels that will not have an RTM300 sensor connected to them. The
required presence time (normally 4 minutes for UK traffic control applications)
for all active channels should also be set.
When the RTM500 Interface Cards are installed and powered for the first
time, the yellow and red LEDs on the front panel will cascade down in
sequence twice and any sensors connected to any of the four channels will
then give a double pulse on the red LED to confirm that they are connected.
NOTE: On first time power up of the connected RTM300 sensors they revert
to the default settings of medium high sensitivity and 4 minutes
presence time, irrespective of which switch settings are set on the
RTM500 interface card. Any change to the default settings post power
up must be implemented by performing a full reset of the interface card.
Check the front panel yellow fault LEDs on each active channel, marked F1
to F4. These should be lit and unblinking for no fault condition. Fast blinking
(2Hz) indicates a short circuit on the channel, slow blinking (0.5Hz) indicates
an open circuit.
If the channels are fault free, the red detection LEDs CH1 to CH4 for any
active sensors can then be checked for correct operation and detection of
vehicles.
