WAGO 750-461 Series User Manual

WAGO-I/O-SYSTEM 750 Device Description 15
750-461 2AI Pt100/RTD
Manual
Version 1.4.1
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3 Device Description
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The 750-461 I/O module 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.
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The WAGO-I/O-CHECK commissioning tool can be used to configure the
required operating mode. The I/O module can also be parameterized via
PROFIBUS and PROFINET device description (GSD file).
The parameterization description can be found in the appendix in Section
“Configuration and Parameterization via GSD File with PROFIBUS DP and
PROFINET IO.”
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The module has two input channels allowing the direct connection of two 2- or 3-
wire resistance sensors.
For example, two 3-wire sensors can be connected either to +R1, RL1 and −R1
or to +R2, RL2 and −R2.
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Each input channel of a module has a shield (screen) connection (S).
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The shield connection is fed directly to the carrier rail and contact is made
automatically by snapping the module onto the rail.
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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 “Connect 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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Use a power supply module!
Use a power supply module for field-side power supply of downstream I/O
modules.
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The field voltage and the system voltage are electrically isolated from each other.
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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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WAGO 750-461 Series Specifications

General

Brand	WAGO
Model	750-461 Series
Category	Control Unit
Language	English