CP3 version 3003
18
- Decentralised modules: all the modules such as light switches, PIR sensors, lux sensors, decentralised I/O
modules that are mounted in the wall boxes or on the wall.
- Centralised cabinet modules: the modules that are mounted in 1-DIN or 2-DIN housings for Din rail
mounting.
All the decentralised Dupline® devices are connected to each other with a single two-wire cable. This cable
carries the communication signal that comes from the bus generator SH2MCG24. These two-wires carry a
DC low-voltage pulsating signal, and therefore, attention must be paid to keep the correct polarity of the
connection.
These unique Dupline® features provide considerable cost savings in many installations.
Dupline
®
Basic Elements
A Dupline® network consists of five basic elements: The controller, a master generator, input modules,
output modules and a two-wire cable. The controller is the brain of the system and collects all information
from its connected busses. The functions and the software are part of this controller. The master generator
controls the communication on the Dupline® bus. It sends out the Dupline® carrier signal and coordinates
all transmissions between input and output modules.
Input modules connect to contacts, voltages and analogue signal sources etc. and transmit this information
via the two-wire cable. In the parking system, the ultrasonic sensors can be regarded as input modules,
because they use the Dupline® bus to send status information to the master generator.
Output modules connect to loads such as lights, roller blinds, motor contactors and valves. In the parking
system, the master generator can be regarded as an output module controlling the display based on the
information received from the sensors via the Dupline® bus.