This analog input module connects two field-side signal conditioners equipped with a HART interface for use in hazardous areas classified as Zone 0 and Zone 1. The module supplies power to the signal conditioners, acquires process values via the analog interface, and enables HART communication for device configuration and retrieval of dynamic variables. The WAGO I/O System 750 XTR must be installed either in Zone 2 or in a non-hazardous area. The 24 V supply voltage is routed from the power jumper contacts to the field-side terminals (HART+) via series resistors. The shield connection directly connects to the DIN-rail. The measurement input is equipped with current limitation, which limits the current to 25 mA. This module powers 2-wire signal conditioners without dedicated power supply. Up to 4 HART dynamic variables (PV, SV, TV, QV) per channel can be mapped in the cyclic process image of the coupler or controller (parameterizable). For HART communication with connected intelligent HART field devices, the HART protocol can be mapped in the cyclic process image of the coupler or controller (parameterizable). FDT/DTM device drivers are available for select (programmable) couplers, allowing HART tool routing to the connected HART device. The device is ideal for operation in extreme environments thanks to: An extended temperature range Greater immunity to impulse voltages and electromagnetic interference Higher vibration and shock resistance
