Binary Input, 4-fold, Contact Scanning, MDRC
ABB BE/S4.20.2.1

Binary Input, 4-fold, Contact Scanning, MDRC

Product code: BE/S4.20.2.1
The device interrogates 4 floating contacts using an internally generated scanning voltage. State inputs via 4 LEDs. Max. 4 signals (in 2 groups) are detectable. Each channel has one push button for manual operation.
Price (Excluding GST)


The 4-fold Binary Input BE/S with manual operation is a modular installation device for installation in distribution boards. The device is suitable for detection of floating contacts. The pulsed scanning voltage is generated internally. 

Buttons for manual operation, which can be used to simulate the input state are located on the front. The current status of the inputs is indicated via yellow LEDs. The device is ready for operation after connecting the bus voltage.

The Binary Input is parameterised via ETS. The connection to the KNX is implemented using the bus connection terminal on the front.

Technical Details


  • Rated Voltage: KNX Bus 21...32VDC
  • Rated Current: Max 6mA
  • Rated Power: Max 130mW
  • Inputs: 4
  • Scanning Voltage: 35V, Pulsed
  • Scanning Current: 0.1mA
  • Scanning Current at Switch On: Max 355mA
  • Permissible Cable Length: Max 100m at 1.5mm2



Technology KNX
Brand ABB
Mounting DIN Rail
Inputs 4
Input voltage KNX Bus (29VDC)
IP rating IP20
Mounting Width 2MW
EAN 40 16779 71078
brand ABB

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