The input module AIH40-N is used for the

connection of 2-wire transducers (active input

= source mode / transducer passive).

The inputs are not galvanically isolated from

each other. When connecting the field devices, care has to be taken that all outputs are

on the same potential.

HART-compatible sensors can be connected

to the module; these will communicate with

the integrated HART controller.

The resolution is 14 bit, i.e. the analog value

between 0…21 mA is represented as a number between 0 and 16383. For clear reading,

the digitized value is displayed in a range of

0…21000 and transmitted to the host system.

Up to 8 HART variables (max. 4 per channel)

can be read via the cyclical PROFIBUS data

traffic. The bidirectional exchange of variables

between the host system and the HART transmitter is implemented via PROFIBUS-DPV1.

Setting the parameters, such as wire-break/

short-circuit monitoring, measuring range,

HART communication, etc., can be carried out

channel-by-channel and is initiated exclusively

by the PROFIBUS master.

■ Input module for connection of 2-wire

transmitters

■ Transmission of HART data