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The output module AOH401Ex is designed for

the connection of analog actuators such as

control valves or process indicators.

The module is functionally compatible with input modules AO40Ex and AOH40EX. In addition, the outputs are galvanically isolated from

each other.

The analog value of 0…21 mA is digitized as

a number between 0 and 21,000 and transferred to the host system. This corresponds to

1 μA per digit.

HART-compatible actuators that communicate

directly with the relevant HART controller can

be connected to the module. HART multiplexing is thus no longer necessary and a higher

data throughput is achieved.

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

can be transmitted via the cyclic user data to

the host system. Acyclic data exchange provides advanced communication options such

as the diagnostics and parameterization of

HART field devices.

The setting of parameters is initiated solely

by the host system. The following parameters

can be set for each channel:

■ Short circuit monitoring

■ Wire-break monitoring

■ Substitute value strategy

■ HART status/measuring range

■ HART variables

■ Output module for the connection of analog actuators

■ Transmission of HART data

■ One HART controller per channel for faster

access to HART data

■ Complete galvanic isolation