Beckhoff EL4172 | EtherCAT Terminal, 2-channel analog output, multi-function

The EL4172 analog output terminal outputs 10 V/20 mA standard signals with

16-bit resolution and up to 10.000 values per second – even with distributed

clocks if necessary. Each channel can be parameterized individually using the

control/TwinCAT and supports all common standard signals in the ±10 V and

±20 mA range, such as 4...20 mA. The current outputs can drive high load

resistances and are equipped with 24 V/0 V contacts to supply actuators.

With an extended output range of ±107%, unconventional setpoints can also

be output – for error reporting purposes, as an example.

Additional functions make the EL4172 a versatile solution for demanding

analog tasks. It offers electrically isolated outputs that can control inputs

without a ground reference. Each channel can be switched off separately

with high resistance. Voltage and current monitoring enable the U/I values

that are actually flowing to be fed back as process data, allowing real-time

diagnosis of the load and wiring (to identify short circuits, for example).

It supports 4-wire operation (Kelvin method), which compensates for any

voltage drops across the supply lines during voltage mode.

Diagnostics are also integrated for the power contact voltage.