EP3174-0002

EP3174-0002 is a Beckhoff module in the EP Digital Input Modules series. It provides four differential inputs, which measure the voltage difference between paired signal lines. The inputs use four 5-pin M12 sockets, while EtherCAT communication is provided through two 4-pin M8 sockets. Supported cable lengths extend to 30 m for connecting field devices.

Each input has 16-bit digital resolution including the sign bit, allowing positive and negative measured values to be represented. The 100 µs conversion time determines how quickly an input signal is converted into a digital value. A 5 kHz input-filter limit restricts higher-frequency signal components. Measurement uncertainty is no more than 0.3% of full scale. Voltage inputs have a minimum resistance of 200 kΩ to limit loading on voltage sources, while current inputs have a resistance of 85 Ω plus the diode voltage contribution.

The maximum common-mode voltage is 35 V, limiting the shared voltage that may be present relative to the input reference. Dielectric strength is rated at a maximum of 35 V. EtherCAT isolation is 500 V, providing electrical separation for the communication interface. The module operates at a nominal US supply voltage of 24 VDC and draws 120 mA from that supply.