RBFU 1.02 Field Unit

RBFU 1.02 Field Unit

  • Retrofit field unit for 1 fire damper
  • connects 1 fire damper to the Bustec Ringbus
  • provides a terminal connection for the Belimo BF230.., BFG230.. and BLF230.. actuators
  • has a predefined address (no addressing required during system commissioning)
  • AC 230 V mains power


RBFU 1.02 Field Unit is used for controlling one Belimo 230 V fire damper actuator (BF230.., BFG230.., BLF230..). The unit is connected to the ringbus master controller module via a 4 wire ring bus communication. Each unit has a predefined address and therefore has not to be addressed during the system commissioning. RBFU 1.02 Field Unit is able to work without 230 V, but then it is only sending data about actuator position to Ringbus master controller and is not able to turn on/off the actuators.

Additional information

Nominal voltage range

AC 100 … 265 V

Maximal current through power terminal

10 A

For wire sizing

18 VA

Power consumption from mains

Actuator consumption + 25 mW

Power consumption from bus

5 mW


Power supply terminal 2 x 3 x max. 2.5 mm²
Actuator output terminal, 6 x 1.5 mm²
Actuator power supply terminal, 3 x 1.5 mm²
2 x RingBus terminal 4 x 1.5 mm² wire

Wire stripping length

10 mm

Protection class

Class II (all insulated)

Degree of protection



CE according to 2004/108/EC


CE according to 2006/95/EC

Rated impulse voltage

2.5 kV

Control pollution degree


Type of action

Type 1

Software class


Ambient humidity range

max. 95 % r.H., non condensing

Ambient temperature range

–20 … +60°C

Non-operating temperature

–40 … +85°C



400 g
154 x 114 x 77 mm


Technical Data Sheet for RBFU 1.02 Field Unit