Serviceline Industrial Sensors
Phone: 330-486-0001
Fax: 330-405-4710
Serviceline Explosion Protection
Phone: 330-486-0002
Fax: 330-963-5827

Digital Input

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For processing input signals from binary sensors or mechanical contacts from the field, Pepperl+Fuchs offers highly reliable digital input modules for use in Zone 2, Class I/Div. 2 explosion-hazardous areas. As part of our LB system remote I/O solution, these modules feature Ex i terminals and are ideally suited for connecting NAMUR proximity switches, optocouplers, or volt-free contacts.

A mechanical contact or switch can also be used with an isolated barrier and mounted with parallel or serial resistors to simulate operation of a NAMUR initiator.

LB system remote I/O digital inputs are available in the following versions:

  • 2- and 3-channel versions address the needs of users that appreciate granularity of their system and easy commissioning.
  • 8-channel versions ensure the highest possible utilization of backplanes used for module connection and enable compact remote I/O solutions with large channel numbers.

The modules support lead breakage detection and short circuit detection. Galvanic isolation separates the inputs from bus and power. In addition, the modules are hot-swappable which allows quick and easy module replacement without time-consuming system shutdowns.


The new LB/FB PROFINET gateways from Pepperl+Fuchs open the door for IIoT 4.0 applications in process industries.