RBFU 3.30 Field Unit

RBFU 3.30 Field Unit

  • Digital I/O field unit
  • 12 digital outputs (relays)
  • for DIN rail mounting
  • 230 V AC mains power
  • Programmable relay outputs safe state
Category: .

Product Description

RBFU 3.30 has 12 digital outputs. It is mountable on DIN rail. Outputs are NO relay contacts. The unit is connected to the Ringbus master controller 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 3.30 ST unit is able to work without 230 V, but then it is only sending information about its power supply condition and is not able to turn on/off the outputs. Relay outputs will go in to preprogrammed safe state if communication is lost for more than 10s or around 1s after loss of the external power. Possible safe states are CLOSE, OPEN and STAY

Additional Information

Electrical data


Nominal voltage range

AC 100 … 230 V 50/60 Hz

For wire sizing

2 VA

Power consumption from mains

1 W

Power consumption from bus

5 mW


Power supply terminal 3 x 1.5 mm² wire
2×6 outputs terminal 12 x 1.5 mm² wire
2 x RingBus terminal 4 x 1.5 mm² wire

Wire stripping length

10 mm

Output type

Latch relay

Output max load

Resistive: 0.2 A at 250 VAC, 2A at 30VDC
Inductive: 0.1 A at 250 VAC, 1A at 30VDC



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





450 g
137 × 127 × 50 mm


Technical Data Sheet for RBFU 3.30 Field Unit