Item no. 750-439/040-000
8-channel digital input; NAMUR; Intrinsically safe; Extreme
Item no. 750-439/040-000

750 XTR Series – I/O System 8-channel digital input; NAMUR; Intrinsically safe; Extreme

Item no. 750-439/040-000
8-channel digital input; NAMUR; Intrinsically safe; Extreme


This digital input module records binary signals from sensors operating in Zone 0+1 hazardous areas, 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 XTR must be installed either in Zone 2 or in a non-hazardous area. Each sensor is supplied with a short-circuit-protected voltage of 8.2 V.


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

Field and system levels are electrically isolated.

The device is ideal for operation in harsh environments thanks to:

  • Extended temperature range
  • Greater immunity to impulse voltages and electromagnetic interference
  • Higher vibration and shock resistance


The digital input module must only be operated via 24 VDC Ex i XTR power supply (750-606/040-000)!

General information (e.g., installation regulations) on explosion protection is available in the WAGO-I/O-SYSTEM 750 XTR 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; via power jumper contacts (Ex i XTR power supply: UO = max. 27.3 V)
Current consumption, field supply (module with no external load) 11 mA
Power loss PV 0.54 W
Dielectric strength 510 VAC/775 VDC; per EN 60870-2-1
Rated surge voltage 1 kV; Rated surge voltage between intrinsically safe and non-intrinsically safe circuits: 1.5 kV (EN 60079-11)
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
Electric circuit, safety-relevant data Uo = 11,76 V; Io = 12,48 mA; Po = 36,67 mW; Kennlinie: Linear
Reactances Ex ia IIC Lo = 100 mH; Co = 1,5 µF
Reactances Ex ia IIB Lo = 100 mH; Co = 9.9 µF
Ex ia IIA reactances Lo = 100 mH; Co = 39 µF
Reactances Ex ia I Lo = 100 mH; Co = 38 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)

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 0.25 … 2.5 mm² / 24 … 14 AWG
Fine-stranded conductor 0.25 … 2.5 mm² / 24 … 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

Housing material Polycarbonate, polyamide 6.6
Fire load 1.258 MJ
Weight 93.8 g
Conformity marking CE

Environmental Requirements

Ambient temperature (operation) -40 … 70 °C
Ambient temperature (storage) -40 … 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 horizontal (standing/lying) or vertical
Relative air humidity (no condensation) 95 %
Relative humidity Short-term condensation per Class 3K7/IEC EN 60721-3-3 and E DIN 40046-721-3 (except wind-driven precipitation, water and ice formation)
Vibration resistance acc. to IEC 60068-2-6 (acceleration: 5g), EN 60870-2-2, IEC 60721-3-1, -3
Shock resistance per IEC 60068-2-27 (15g/11 ms/half-sine/1,000 shocks; 25g/6 ms/1,000 shocks), EN 61373
EMC immunity to interference acc. to EN 61000-6-1, -2, EN 61131-2, marine applications, EN 60255-26, EN 60870-2-1, EN 61850-3, IEC 61000-6-5, IEEE 1613, VDEW: 1994
EMC emission of interference acc. to EN 61000-6-3, -4, EN 61131-2, EN 60255-26, marine applications, EN 60870-2-1, EN 61850-3
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 4055143649438
Customs Tariff No. 85389099990

Approvals / Certificates


Certificate name
Approval: ATEX
TUEV Nord Cert GmbH
Certificate name: TUEV_17_ATEX_196484X
Approval: IECEx
TUEV Nord Cert GmbH
Certificate name: IECEx TUN 17.0005X



Data sheet

750-439/040-000, 8DI NAMUR Ex i XTR
Nov 14, 2017
PDF 212.7 kB


System Manual /XTR Basic conditions and recommendations for higher operational safety
Aug 11, 2016
PDF 2.9 MB
NAMUR, Ex-i, 8-Channel Digital Input Module /XTR
Mar 7, 2018
PDF 1.5 MB

Bid Text

Mar 12, 2018
DOC 36.4 kB

System Description

Intrinsically Safe XTR Modules ‒ General Product Information
Sep 29, 2017
PDF 403.2 kB
Overview on WAGO-I/O-SYSTEM 750 approvals
Jun 6, 2017
PDF 314.9 kB

Product family

750 XTR Series – I/O System

I/O-System 750 XTR: Dort automatisieren, wo jedes andere System an seine Grenzen stößt – und das zuverlässig und wirtschaftlich! XTR – dieses Kürzel im Systemnamen steht für extremen Schutz vor klimatischen Einflüssen, Schwingungen, Erschütterungen und Überspannungen.

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