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Device Description

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The I/O module 750-451 (8 AI RTD) measures resistance at field level or

evaluates platinum or nickel resistance sensors.

The resistance values are converted into temperature values. A microprocessor in

the I/O module linearizes the measured resistance values and converts them into a

numeric value proportional to the temperature of the selected resistance sensor.

The WAGO-I/O-CHECK commissioning tool can be used to set the required

operating mode.

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The I/O module has eight input channels, providing a direct connection to 2-wire

resistance sensors.

The sensors are connected to Push-in CAGE CLAMP

+A8/−A8.

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The assignment of the connections is described in the "Connectors" section.

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Connection examples are shown in section "Connecting Devices" > ... >

"Connection Example(s)".

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The operating status of the channels is indicated by a green status LED per

channel.

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A red error LED per channel indicates a wire break, a short circuit or that the

signal is outside the measuring range.

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The meaning of the LEDs is described in the "Display Elements" section.

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Do not exceed maximum current via power jumper contacts!

The maximum current to flow through the power jumper contacts is 10 A.

Greater currents can damage the contacts.

When configuring your system, ensure that this current is not exceeded. If

exceeded, insert an additional supply module.

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Use supply modules for ground (earth)!

The I/O module has no power jumper contacts for receiving and transmitting the

earth potential. Use a supply module when an earth potential is needed for the

subsequent I/O modules.

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With consideration of the power jumper contacts, the individual modules can be

arranged in any combination when configuring the fieldbus node. An arrangement

in groups within the group of potentials is not necessary.

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The I/O module 750-451 can be used with all fieldbus couplers/controllers of the

WAGO-I/O-SYSTEM 750.

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The field voltage and the system voltage are electrically isolated from each other.

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WAGO-I/O-SYSTEM 750

750-451 8 AI RTD

terminals +A1/−A1 ...

Version 1.1.0

Manual

Table of Contents