Belimo UK24BAC, Technical Data Manual

Page: 5 / 20

UK24BAC Belimo Gateway MP to BACnet MS/TP
www.belimo.com T9-
UK24BAC • en • v1.9 • 06.2018 • Subject to changes
5 / 20
Electrical installation
Wiring diagram
AC/DC 24 V supply
Connection via safety isolation
transformer!
Dimensioning of the supply
Also take into account the dimensioning
specifications of the connected
MP/MPL/MFT(2) actuators!
~

AC 24 V
+ - DC 24 V
BACnet MS/TP
MPL
MP
5 2 1
D+
D-
MP
24V
GND
1 2 3
4
MP
MP
MP
5 2 1 3
MP
MP
MP
5 2 1 3
MP MP
MP
5 2 1 3
The wiring of BACnet MS/TP (RS485) is to be carried out in accordance with applicable
directives. The device possesses resistors which can be switched on for bus connection and
biasing.
The GND of the RS485 line is galvanically isolated from the MP-Bus GND. Additional galvanic
separation shall be provided for segments crossing buildings.
Connection of the MP-Bus

The network consists of a 3-pin connection
(MP communication and 24 V supply).

Possibility of connecting a maximum of 8 MP/MPL/MFT(2) actuators per network.

Neither a special cable nor terminating resistors are required.

The signal conductor lengths (for calculation, see below) are limited:
– by the sum of the signal conductor data of the connected MP/MPL/MFT(2) actuators,
– by the type of supply (AC 24 V via the bus or DC 24 V via the bus),
– by the signal conductor cross-section.
With AC 24 V supply:
Maximum signal conductor length
L = max. cable length [m]
With AC 24 V supply:
(minimum transformer voltage 21.6V)
Total dimensioning
MP/MPL/MFT(2) actuators [VA]
Power rating [VA]
For the calculation of the maximum cable length, the Belimo MP wiring calculator is available on
the Belimo website for the complete MP-Bus range.
UK24BAC
More actuators
and sensors
(total 8)