Item no. 750-439
8-channel digital input; NAMUR; Intrinsically safe
Item no. 750-439

750/753 Series I/O-System 8-channel digital input; NAMUR; Intrinsically safe

Item no. 750-439
8-channel digital input; NAMUR; Intrinsically safe


The 750-439 Digital Input Module records binary signals from sensors operating in hazardous environments of Zones 0 and 1, permitting channel-by-channel short-circuit and wire-break diagnostics. NAMUR sensors, optocouplers, mechanical contacts (LED diagnostics can be turned off via control byte) or other actuating elements can be connected via intrinsically safe devices.

The WAGO-I/O-SYSTEM 750 must be installed either in Zone 2 or in a non-hazardous area. Each sensor is supplied with a short-circuit-protected voltage of 8.2V.

Field and system levels are electrically isolated.

LED displays:

  • Green LED (signal ON)
  • Red LED (short-circuit)
  • Red flashing LED (wire-break)


The digital input module must only be operated via Ex i 24VDC power supply!

General information (e.g., installation regulations) on explosion protection is available in the WAGO-I/O-SYSTEM 750 manuals!

Product details


Technical Data

Number of digital inputs 8
Total number of channels (module) 8
Type of signal NAMUR
Sensor supply voltage 8.2 V DC; short-circuit-protected, isolated channels
Sensor connection 4 x (2-conductor)
Input characteristic high-side switching
Input filter (digital) 3 ms
Open-circuit voltage 8.2 V
Short-circuit current ≤ 8.2 mA (± 0.2 mA)
Signal current (0) NAMUR 1.2 mA
Signal current (1) NAMUR 2.1 mA
Switching hysteresis 0.2 mA
Contact resistance max. 1000 Ω
Input pulse duration 5 ms
Input pulse separation 3 ms
Power consumption Pmax. 1.2 W
Max. input data width (internal) 16 Bit
Max. output data width (internal) 16 Bit
Intrinsic safety Ex i yes
System supply voltage DC 5 V; via data contacts
Current consumption, system supply 56 mA
Field supply voltage DC 24 V; über Leistungskontakte (Versorgung über Einspeisung Ex i UO = max. 27,3 V); zur Weiterleitung getunnelt
Current consumption, field supply (module with no external load) 11 mA
Power loss PV 0.54 W
Isolation 300 VAC system/supply
Number of incoming power jumper contacts 2
Number of outgoing power jumper contacts 2
Current carrying capacity of the power jumper contacts 1 A
Ex guideline EN/IEC 60079-0, -7, -11, -26, -31
Electric circuit, safety-relevant data Uo = 11.76 V; Io = 12.4 mA; Po = 36.67 mW; Characteristic: Linear
Reactances Ex ia IIC Lo = 100 mH; Co = 1 µF
Reactances Ex ia IIB Lo = 100 mH; Co = 9.9 µF
Ex ia IIA reactances Lo = 100 mH; Co = 9,9 µF
Reactances Ex ia I Lo = 100 mH; Co = 30 µF
Reactances (The above-listed ratings do not account for the coincidental occurrence of capacitances and inductances. For ratings taking the coincidental occurrence of capacitances and inductances into account, see manual)
Marking ATEX, IECEx, INMETRO, Underwriters Laboratories Inc.
EC EMC guideline 2014/30/EU

Connection data

Number of connections: Inputs/outputs 16
Connection technology: inputs/outputs 16 x CAGE CLAMP®
Connection technology: inputs/outputs CAGE CLAMP®
Connection type (1) Inputs/Outputs
Solid conductor 0.08 … 2.5 mm² / 28 … 14 AWG
Fine-stranded conductor 0.08 … 2.5 mm² / 28 … 14 AWG
Strip length 8 … 9 mm / 0.31 … 0.35 Inch

Geometrical Data

Width 24 mm / 0.945 Inch
Height 67.8 mm / 2.669 Inch
Height from upper-edge of DIN-35 rail 60.6 mm / 2.386 Inch
Depth 100 mm / 3.937 Inch

Mechanical data

Type of mounting DIN-35 rail

Material Data

Color blau
Housing material Polycarbonate, polyamide 6.6
Fire load 1.672 MJ
Weight 92.7 g
Conformity marking CE

Environmental Requirements

Ambient temperature (operation) 0 … 55 °C
Ambient temperature (storage) -25 … 85 °C
Degree of protection IP20
Degree of pollution (5) 2 per IEC 61131-2
Operating altitude without temperature derating: 0 … 2000 m; with temperature derating: 2000 … 5000 m (0.5 K/100 m); max.: 5000 m
Mounting position any
Relative air humidity (no condensation) 95 %
Vibration resistance 4g per IEC 60068-2-6
Shock resistance 15g per IEC 60068-2-27
EMC immunity to interference acc. to EN 61000-6-2, marine applications
EMC emission of interference acc. to EN 61000-6-3, marine applications
Exposure to pollutants Per IEC 60068-2-42 and IEC 60068-2-43
Permissible H2S contaminant concentration at a relative humidity < 75 % 10 ppm
Permissible SO2 contaminant concentration at a relative humidity < 75 % 25 ppm

Commercial data

Packaging type BOX
Country of rigin DE
GTIN 4050821623366
Customs Tariff No. 85389099990
Product Group 15 (Remote I/O)

Approvals / Certificates


Certificate name
Approval: TUEV Nord
TUEV Nord Cert GmbH
Certificate name: TUEV_12_ATEX_106032X
Approval: TUEV Nord
TUEV Nord Cert GmbH
Certificate name: IECEx TUN 12.0039X
Approval: UL
Underwriters Laboratories Inc.
Certificate name: E198726 Sec.1

Ship Approvals

Certificate name
Approval: GL
Germanischer Lloyd
Certificate name: 11 631 - 10 HH


Certificate name
Approval: UL
UL International Netherlands B.V.
Certificate name: E175199 Sec.1



Data sheet

750-439, 8DI NAMUR Ex i, data sheet
Jul 27, 2017
PDF 249.7 kB


NAMUR, Ex-i, 8-Channel Digital Input Module Proximity switch acc. to DIN EN 50227
Aug 3, 2017
PDF 2.0 MB
Use in Hazardous Environments Term definition, marking and installation regulations
May 8, 2014
PDF 1.0 MB
Design Notes Basic conditions and recommendations for higher operational safety
May 3, 2011
PDF 1.5 MB

Bid Text

750-439 IO-Klemmen
Jan 21, 2016
DOC 31.2 kB

System Description

Ex i Overview
Jun 6, 2017
PDF 453.4 kB
750/753 Series I/O-System ‒ General Product Information
Jun 6, 2017
PDF 1.9 MB
Overview on WAGO-I/O-SYSTEM 750 approvals
Jun 6, 2017
PDF 314.9 kB


CAD data

3D Download 750-439

Compatible products

Carrier rail

Marking accessories

Supply module

shield connection

Product family

750/753 Series I/O-System

Your Shopping Cart

Added to shopping cart.
Go to the shopping cart Request offer. Continue shopping.

Are you sure?

Add project directly

Please enter an exact item number (e.g., 2002-1201) and confirm your entry with the “Enter” key. Use the “Tab” key to navigate between the columns.
Change Country

You are leaving the currently selected country website and will be logged out. Your user account only applies to one country. Your newly selected country website has other contacts and may have different content and functions.

To top of page