Best Pepperl-Fuchs FB1208B3 Digital Input Manufacturer, Products

Functions of FB1208B3

This device receives digital input signals from NAMUR sensors or mechanical contacts in hazardous areas.

It can detect open circuit or short circuit faults and trigger an alarm.

The inputs are electrically isolated from the bus and power supply (compliant with EN 60079-11).

Product Description

Product Overview
Pepperl-Fuchs FB1208B3 is an 8-channel digital input module belonging to the FB series remote I/O system. It is specially designed for explosion-proof scenarios in industrial sites and is committed to reliable collection and transmission of digital signals in hazardous areas.
Core Positioning and Application Scenarios
This module is oriented towards Zone 1 explosive hazardous areas. It needs to be installed in a suitable protective enclosure when in use. It can be connected to NAMUR sensors and non-voltage contacts to collect passive signals from on-site equipment. It is widely used in scenarios such as distributed signal collection in industrial fields like petroleum, chemical industry and coal mines. It can stably transmit on-site digital signals to the control system in the safe area, laying a foundation for the stable operation of the whole industrial control system.
Compliance and Certification
The module has obtained the EAC certification in Russia, with the certification number RU C - IT.Miii06.B.00129. Its various performance indicators meet multiple international and industrial related standards, which ensures the reliability and compatibility of the product in cross-regional and multi-scenario applications.
Key Benefits at a Glance
  • 8-channel Interface
  • Inputs Ex ia intrinsically safe
  • Installation in suitable enclosures in Zone 1
  • Hot-swappable under voltage
  • Dry contact or NAMUR inputs compatibility
  • Selectable positive or negative logic
  • Forcing simulation mode for service
  • Line fault detection (LFD)
  • Permanent self-monitoring
  • Configurable On/Off delay
Technical Specifications
Technical Data - Slots
Occupied slots 2
Supply
Connection backplane bus
Rated voltage (Ur) 12 V DC , only in connection with the power supplies FB92**
Power dissipation 0.95 W
Power consumption 0.95 W
Internal bus
Connection backplane bus
Interface manufacturer-specific bus to standard com unit
Digital input
Number of channels 8
Sensor interface
Connection NAMUR sensor
Connection [2] volt-free contact
Connection (channel wiring) channel I: 1+, 2-; channel II: 3+, 4-; channel III: 5+, 6-; channel IV: 7+, 8-; channel V: 9+, 10-; channel VI: 11+, 12-; channel VII: 13+, 14-; channel VIII: 15+, 16-
Rated values acc. to EN 60947-5-6 (NAMUR)
Switching point/switching hysteresis 1.2 ... 2.1 mA / ± 0.2 mA
Internal resistor (Ri) 1 kΩ
Line fault detection can be switched on/off for each channel via configuration tool
Connection (fault detection wiring) mechanical switch with additional resistors (see connection diagram) proximity switches without additional wiring
Short-circuit < 360 Ω
Open-circuit < 0.35 mA
Minimum pulse duration 1 ms
Indicators/settings
LED indication LED green: supply; LED red: line fault
Coding optional mechanical coding via front socket
Directive conformity
Electromagnetic compatibility (Directive 2014/30/EU) EN 61326-1:2013
Conformity
Electromagnetic compatibility NE 21
Degree of protection IEC 60529
Environmental test EN 60068-2-14
Shock resistance EN 60068-2-27
Vibration resistance EN 60068-2-6
Damaging gas EN 60068-2-42
Relative humidity EN 60068-2-78
Ambient conditions
Ambient temperature -40 ... 60 °C (-40 ... 140 °F)
Storage temperature -40 ... 85 °C (-40 ... 185 °F)
Relative humidity 95 % non-condensing
Shock resistance shock type I, shock duration 11 ms, shock amplitude 15 g, number of shocks 18
Vibration resistance frequency range 10 ... 150 Hz; transition frequency: 57.56 Hz, amplitude/acceleration ± 0.075 mm/1 g; 10 cycles
frequency range 5 ... 100 Hz; transition frequency: 13.2 Hz amplitude/acceleration ± 1 mm/0.7 g; 90 minutes at each resonance
Damaging gas designed for operation in environmental conditions acc. to ISA-S71.04-1985, severity level G3
Mechanical specifications
Degree of protection IP20 (module), a separate housing is required acc. to the system description
Connection removable front connector with screw flange (accessory)
wiring connection via spring terminals (0.14 ... 1.5 mm²) or screw terminals (0.08 ... 1.5 mm²)
Mass approx. 945 g
Dimensions 57 x 107 x 132 mm (2.2 x 4.2 x 5.2 inch)
Data for application in connection with hazardous areas
EU-type examination certificate Presafe 19 ATEX 14058U
Marking II 2(1)G Ex db eb q [ia Ga] IIC Gb
II 1(1)D [Ex ia Da] IIIC
I (M1) [Ex ia Ma] I
Input
Voltage (Uo) 14.9 V
Current (Io) 15.7 mA
Power (Po) 58.2 mW (linear characteristic)
Delivery & Physical Information
Product Weight: approx. 945 g
Product Dimensions: 57 x 107 x 132 mm (2.2 x 4.2 x 5.2 inch)
Delivery information typically includes standard processing times, optimized packaging for industrial electronics, and transport arrangements that ensure safe arrival for sensitive electrical hardware.
Manuals & Resources
Pepperl-Fuchs FB1208B3 Digital Input Datasheet
Pepperl-Fuchs FB1208B3 Digital Input Datasheet.pdf
Request Datasheet
Frequently Asked Questions (FAQ)
Q: What is the primary function of the Pepperl-Fuchs FB1208B3 module?
The FB1208B3 is an 8-channel digital input module designed to safely collect and transmit digital signals from Zone 1 hazardous areas to systems located in safe zones.
Q: What kind of sensors can be connected to the FB1208B3 digital input?
It is designed for connection with intrinsically safe (Ex ia) NAMUR sensors or volt-free (dry) contacts.
Q: Does this module support hot-swapping under voltage?
Yes, the FB1208B3 is hot-swappable, meaning the module can be safely inserted or replaced while the system is powered on, reducing downtime.
Q: What safety certifications does this module hold?
The module carries Russian EAC certification (number RU C - IT.Miii06.B.00129) and complies with EU-type examination directives for hazardous zones (Presafe 19 ATEX 14058U).
Q: Can the line fault detection feature be customized?
Yes, the Line Fault Detection (LFD) for short-circuit and open-circuit monitoring can be independently switched on or off for each of the 8 channels using the configuration tool.
Q: What are the physical dimensions and weight of the module?
The module measures 57 x 107 x 132 mm (2.2 x 4.2 x 5.2 inches) and weighs approximately 945 grams.

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