Wago

Wago 750-491

1-channel analog input; Resistor bridges (strain gauge)

MPN: 750-491
Category: I/O Systems

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What is the Wago 750-491?

This module enables the direct connection of a resistor measurement bridge. The bridge voltage U D and supply voltage U ref of the bridge are digitized with a resolution of 16 bits.

The two input channels for the resistor bridge are available as two 16-bit values for additional processing. The result of measurement can be calculated by the formula: Measured value = U D / U ref .

Field and system levels are electrically isolated.

Specifications

Technical data

Number of analog inputs	1
Total number of channels (module)	1
Signal type	Resistor bridge (strain gauge)
Sensor supply	5 VDC
Signal voltage U<sub>D</sub>	−15 … +15 mV
Signal voltage U<sub>ref</sub>	2 … 6 V
Resolution [bit]	16 Bit
Data width	2 x 16-bit data; 2 x 8-bit control/status (optional)
Internal resistance	> 200 kΩ (Uref), > 1 MΩ (UD)
Conversion time (typ.)	500 ms
Measurement error	UD: ±30 µV; Uref: ±10 mV
Filter	50 Hz
Supply voltage (system)	5 VDC; via data contacts
Current consumption (5 V system supply)	65 mA
Isolation	500 V system/field
Indicators	LED (A, C) green: Function UD, Uref; LED (B, D) red: Error UD, Uref

Connection data

Connection technology: I/O	8 x CAGE CLAMP®
Connectable conductor materials	Copper
Connection type	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 inches

Physical data

Width	12 mm / 0.472 inches
Height	100 mm / 3.937 inches
Depth	69.8 mm / 2.748 inches
Depth from upper-edge of DIN-rail	62.6 mm / 2.465 inches

Mechanical data

Mounting type	DIN-35 rail
Pluggable connector	fixed

Material data

Color	light gray
Housing material	Polycarbonate; polyamide 6.6
Fire load	0.085 MJ
Weight	53 g
Conformity marking	CE

Environmental requirements

Ambient temperature (operation)	0 … +55 °C
Ambient temperature (storage)	-40 … +85 °C
Protection type	IP20
Pollution degree	2 per IEC 61131-2
Operating altitude	0 … 2000 m / 0 … 6562 ft
Mounting position	Horizontal left, horizontal right, horizontal top, horizontal bottom, vertical top and vertical bottom
Relative humidity (without condensation)	95 %
Vibration resistance	Per IEC 60068-2-6
Shock resistance	15g per IEC 60068-2-27
EMC immunity to interference	per EN 61000-6-2, marine applications
EMC emission of interference	per EN 61000-6-4, marine applications
Exposure to pollutants	Per IEC 60068-2-42 and IEC 60068-2-43
Permissible H<sub>2</sub>S contaminant concentration at a relative humidity <lt/> 75 %	10 ppm
Permissible SO<sub>2</sub> contaminant concentration at a relative humidity <lt/> 75 %	25 ppm

Commercial data

Product Group	15 (I/O System)
PU (SPU)	1 pcs
Packaging type	box
Country of origin	DE
GTIN	4045454849351
Customs tariff number	85389099990

Product Classification

UNSPSC	32101602
eCl@ss 10.0	27-24-26-01
eCl@ss 9.0	27-24-26-01
ETIM 9.0	EC001596
ETIM 10.0	EC001596
ECCN	NO US CLASSIFICATION

Environmental Product Compliance

RoHS Compliance Status

Compliant,No Exemption

750-491: frequently asked questions

When can 750-491 be shipped?

750-491 is sourced on request — request a quote and we'll confirm the exact availability and shipping timeline for this specific unit.

Can I pick up 750-491 in person?

Local pickup from our Groningen, Netherlands warehouse may be possible — contact us before ordering to check availability and arrange a collection time.

Is express delivery available?

Yes — mention it when you request a quote for 750-491 and we'll include express shipping options in our reply.

My factory is down and I need this urgently — can you help?

For a critical breakdown, contact us directly at +31 (0)50-7110348 or sales@partnerplc.com — we can look into same-day courier or dedicated taxi/hotshot delivery for 750-491, subject to availability and destination.