Your reliable automation partner

Solutions for building, industrial and medical automation Safety, savings, control and comfort, all in one

RBFU 1.10 LE Field Unit

RBFU 1.10 LE Field Unit

  • Light field unit for 2 fire dampers
  • connects 2 fire dampers to the Bustec Ringbus
  • provides a terminal connection for the Belimo BF230.. and BLF230.. actuators
  • has a predefined address (no addressing required during system commissioning)
  • AC 230 V mains power
Category: .

Product Description

RBFU 1.10 LE Field Unit is used for controlling up to two Belimo 230 V fire damper actuators (BF230.., BLF230..). RBFU 1.10 LE Field Unit is connected to RingBus master controller via the 4 wire Ringbus communication. Each unit has a predefined address and therefore has not to be addressed during the system commissioning. RBFU 1.10 LE Field Unit is able to work without 230 V, but then it is only sending data about actuator position to the 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

For wire sizing

36 VA

Power consumption from mains

Actuator consumption

Power consumption from bus

5 mW + 170 mW for 20 ms during relay communication


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



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


Ambient humidity range

max. 95 % r.H., non condensing

Ambient temperature range

–20 … +60°C

Non-operating temperature

–40 … +85°C





300 g
154 × 114 × 77 mm


Technical Data Sheet for RBFU 1.10 LE Field Unit