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saia-pcd.com
PCD1.M2xx0
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Communication & interaction
2.6.8
MP-Bus
Field bus module for Belimo MP-Bus devices
MP-Bus master interface module
MP-Bus is a Belimo communication system used to connect Belimo MP-/
MFT(2)* field devices such as valve and shutter position drives or VAV
controllers and room air sensors in building automation systems. Installation
is easy. In addition to the 24V AC/DC power supply, the MP-Bus needs just
one unshielded wire which can be run through the same cable.
Up to 8 drives can be attached to one communication channel. The total
length of the mains cable depends on the diameter of the selected cable
and the number and output of the connected drives**. A total length
of approx. 100 m is usually reached. Since the length of the connection
and the number of drives is limited, no other demands such as termination
resistors or shielded cable are placed on the bus topology.
In addition to the connected drives, sensors can be connected directly via
a drive or MP-Bus add-on modules.
The extensive Saia PG5® FBox library has function modules for
communicating with the PLC program. The drives are addressed using
the communication driver FBox and can then exchange data with
the application program via the respective FBoxes.
The Belimo components are usually commissioned from the application
program using the SBC FBoxes. Only a few components such as VAV
controllers require additional Belimo parameterisation tools to adjust their
operational parameters.
* MP and MFT are Belimo designations. MP = Multi-point; MFT= Multi-functional technology
** For further information on the system layout, see the Belimo documentation,
PCD1 modular expansion with MP-Bus interfaces
Application example: HVAC system with a PCD3.M5 and up to 64 MP-Bus drive units
on 8 MP interfaces
PCD1, PCD2, PCD3
or PCS1 compact
controller with
MP-Bus module
Fire damper
VAV boxes
Air
dampers
Lift valves
Regulator ball
valves
L
ON
W
ORKS
®, Ethernet-TCP/IP, Profibus, etc.
