CP3 version 3003
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In the drawing below, a single carpark lane is shown. A lane refers to the physical lane in the carpark
building. The lane can be long or short with few or many cars. That depends completely on the structure in
the building.
In this example we have a Lane with 76 spaces on each side.
To obey the rules of maximum 50 sensors on a line and maximum 90 sensors on a generator, we decide to
split up the lane in four equal parts with 38 sensors in each part, and thereby have 4 lines in one lane.
The generators must be placed in a way that reduces unnecessary wire length. Extra wire increases the
voltage drop and thereby reduces the number of sensors in the installation. Please refer to the section
‘calculation’.
In this example the two generators are placed in the opposite ends of the lane and supply lines 1.1-1.2 and
1.3-1.4, respectively. In total, each generator supplies 2*38=76 sensors.
Due to a good balance in the system, it makes sense to equal the load on all four lines as mentioned in the
above example.
The Carpark Master Generator with DC Power Supply
SBP2MCG324 Carpark Master Generator generates the Dupline® carrier signal and 28VDC power supply
synchronization needed to create the 3-wire bus linking all the sensors and display interfaces in the lane
together. In a given lane you will always find one - but only one – carpark master generator. The CMCG can
operate with maximum 50 sensors in a line and maximum 90 sensors in total.