WAGO-I/O-SYSTEM 750 Device Description 13
750-485 2AI 4-20mA Ex i
Manual
1.3.0 HW-Version 06, SW-Version 31
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3 Device Description
Pos: 18.1 .1 /Ser ie 7 50 ( WAG O-I/ O-SYSTEM)/Gerätebeschreibung/Einleitung/Anwendung/AI/Anwendung 750-0485 AI Ex i Zone 0 + 1 (4...20mA) @ 20\mod_1406207000202_21.docx @ 160130 @ @ 1
The Analog Input Module 750-485 processes analog signals with the norm value
of 4 ... 20 mA from intrinsically safe sensors, operating in hazardous
environments of zone 0+1.
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Installation only in zone 2 or in non-hazardous environments!
The installation of the WAGO-I/O-SYSTEM 750 fieldbus couplers/controllers
and I/O modules is only to be done in zone 2 or in non-hazardous environments.
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This I/O module connects to 2- and 3-wire sensors. Two-wire sensors are
connected via U
V
and AI and in three-wire technic via U
V
, AI and 0V.
The sensors are basically supplied from the I/O module's field-side power supply
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The I/O module has 2 input channels for fieldside signals. The sensors may be
received via the CAGE CLAMP
®
connections AI 1 or AI 2.
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The intrinsically safe supply of the transducer is done with a noninherently short-
circuit proof transmitter supply via the connections U
V
1 or U
V
2.
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The channels have a common reference potential and a shield connection.
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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 fault LED per channel indicates a wire break 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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The field voltage and the system voltage are electrically isolated from each other.
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Any configuration of the I/O module is possible within an intrinsically safe
segment 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 750-485 can be used with all fieldbus couplers/controllers of the
WAGO-I/O-SYSTEM 750 (except for the economy types 750-320, -323, -324
and -327).
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