FM3312-B110-0210 Beckhoff
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The Beckhoff FM3312-B110-0210 is part of the FM Thermocouplers series and provides 12 thermocouple channels with a differential input type. It features IP65 protection rating, supports EtherCAT fieldbus via two D-coded M12 connectors, and has a maximum cable length of 30 meters. The device has a 0.1 degree Celsius resolution per digit and operates on a 24 V DC supply.
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Product Description:
The FM3312-B110-0210 is a thermocouple input module manufactured by Beckhoff within the FM Thermocouplers series. Mounted in the field, it acquires low-level temperature signals from process sensors and forwards digitized data to a controller, enabling closed-loop temperature regulation in industrial automation lines. Its function is limited to signal conditioning and transmission, so control decisions remain in the connected controller rather than on the module itself.
The module communicates over an EtherCAT network at a deterministic rate of 100 Mbit/s through two D-coded 4-pin M12 sockets arranged as an in/out switch port. Power is supplied from a nominal 24 V DC source that can vary between −15% and +20%, and the electronics typically draw 120 mA during normal operation. Five selectable input filters allow the user to balance response time and noise suppression before a differential converter samples each channel. Signal and fieldbus domains are galvanically separated by 500 V, and the housing carries an IP65 rating so the unit may be installed directly on machinery without an additional enclosure. Wiring uses a 2-wire direct connection for each sensor to minimize loop resistance, while proper shielding helps preserve measurement stability over longer cable runs.
On the measurement side, the device offers 12 thermocouple channels with a resolution of 0.1 °C per digit, which supports fine temperature discrimination in heat treatment or HVAC applications. This channel count allows several sensing points to be monitored from one field-mounted node without moving the signal conversion hardware back to the cabinet. Sensor leads can be routed up to 30 m from the module without repeaters, provided that cable capacitance stays within tolerated limits. The electronics withstand ambient temperatures from 0 °C to 55 °C during operation and −25 °C to 85 °C in storage, and the current demand can rise during full channel use at the highest filter bandwidth.
