Device Description - WAGO 750-484 Manual

WAGO-I/O-SYSTEM 750
750-484 2 AI 4-20 mA HART Ex i
3

Device Description

The Analog Input Module 750-484 processes analog signals with the norm value
of 4 ... 20 mA from intrinsically safe sensors, operating in hazardous
environments of zone 0+1.
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.
The I/O module also enables digital communication to be carried out with HART-
enabled field devices (Highway Addressable Remote Transducer).
To fulfill Ex i regulations, only passive transducers, that means without their own
voltage supply, like adjustable resistances, pressure, flow and level meters, may
be connected to the input module.
The transducers are directly supplied from the I/O module.
The I/O module allows the connection of 2-wire technology sensors. The sensors
are connected via HART + and HART +. They are supplied by the I/O module's
field supply.
The I/O module has 2 input channels and enables field signals to be received via
the HART 1+ and HART 1− and HART 2+ and HART 2− connections. Typically,
the current values are measured at these connections, but at the same time the
HART signals can also be coupled and decoupled on an alternating voltage basis.
The channels have a common reference potential and a shield connection.
The shield connection is fed directly to the carrier rail and contact is made
automatically by snapping the module onto the rail.
The assignment of the connections is described in the "Connectors" section.
Connection examples are shown in section "Connect Devices" > ... >
"Connection Example(s)".
The channels are not electrically isolated from one another.
The input signal is electrically isolated and is transmitted with a resolution of
12 bits.
Simple parameterization of the HART I/O module for 6 different operating modes
enables the I/O module to be used optimally for 3 different types of application.
Manual
V 1.2.0 HW-Version 04, SW-Version 03
Device Description 13