RBFU 1.01 ST Field Unit

RBFU 1.01 ST Field Unit

  • Field unit for 1 fire damper
  • connects 1 fire damper to the Bustec Ringbus
  • provides a plug connection for the Belimo BF24..-ST, BFG24..-ST and BLF24..-ST actuators
  • has a predefined address (no addressing required during system commissioning)
  • AC 230 V mains power
Category: .

Product Description

RBFU 1.01 ST Field Unit is used for controlling one Belimo 24 V fire damper actuator (BF24..-ST, BFG24..-ST, BLF24..-ST). The unit is connected to the ringbus master controller module via a 4 wire ring bus communication. The Belimo ST actuators are equipped with plug connectors that can be plugged directly into RBFU 1.01 ST unit. The actuator is isolated from mains by a transformer. Each unit has a predefined address and therefore has not to be addressed during the system commissioning. RBFU 1.01 ST 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

Electrical data


Nominal voltage

AC 230 V 50/60 Hz

Nominal voltage range

AC 100 … 230 V

Maximal current through power terminal

10 A

For wire sizing

18 VA

Power consumption from mains

Actuator consumption + 200 mW

Power consumption from bus

5 mW


Power supply terminal 2 x 3 x max. 2.5 mm² (min. 0.5mm²)
Actuator outputs Plug, 6 poles
Actuator power supply Plug, 3 poles
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

Ambient humidity range

IEC 60730-1 max. 95 %

Ambient temperature range

–20 … +60°C

Non-operating temperature

–40 … +85°C





400 g
154 × 114 × 77 mm


Technical Data Sheet for RBFU 1.01 ST Field Unit