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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* 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 shield-
ed cable are placed on the bus topology. In addition to
the connected drives, sensors can be connected direct
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 communi-
cation driver FBox and can then exchange data with the application program via the respective FBoxes. The Belimo components are
generally 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 is a Belimo designation. MP = multi-point
** For further information on the system layout, see the Belimo documentation,
Application example: HVAC system with a PCD3.M5 and up to 64 MP
Bus drive units on 8 MP interfaces
Overview
PCD1, PCD2,
PCD3
compact control-
ler with MP Bus
module
Fire dampers VAV boxes
Air damp-
ers
Globe valves Regulator ball
valves
L
on
W
orks
®, EthernetTCP/IP, Profibus, etc.
Automation station
Onboard; Slot A, A1 and A2
I/O slot #0…#3
MP Bus module Total
Number of MP Bus
MP Bus
module
Total
Number of MP Bus
Cables
Drives
Cables
Drives
PCD3.M3xxx / M5xxx
–
–
–
–
PCD3.F21x, PCD3.F221,
PCD3.F240
4
–
–
+ PCD7.F180S
+ 4
+ 32
PCD3.F281
4
4
32
+ PCD7.F180S*
+ 2
+ 16
PCD3.Compact | PCD3.WAC
PCD7.F180S
1
1
8
–
–
–
–
PCD2.M5xxx
PCD7.F180S
2
2
16
PCD2.F21x0, PCD2.F2210,
PCD2.F2400
4
–
–
+ PCD7.F180S
+ 4
+ 32
PCD2.F2810
4
4
32
+ PCD7.F180S
+ 4
+ 32
PCD1.M2x20 / PCD1.M2x60
PCD7.F180S
1
1
8
PCD2.F21x0, PCD2.F2210,
PCD2.F2400
2
–
–
+ PCD7.F180S
+ 2
+ 16
PCD2.F2810
2
2
16
+ PCD7.F180S
+ 2
+ 16
PCD1.Room
PCD7.F180S
1
1
8
PCD2.F21x0, PCD2.F2210,
PCD2.F2400
1
–
–
+ PCD7.F180S
+ 1
+ 8
PCD2.F2810
1
1
8
+ PCD7.F180S
+ 1
+ 8
PCD1.M0160E0
PCD7.F180S
1
1
8
–
–
–
–
* With 4 PCD3.F281 only 2 additional PCD1.F180S can be used, because the load on +V would be too large
