IE3112-0000 by Beckhoff

The IE3112-0000 is an analog input extension box unit manufactured by Beckhoff for the IE Extension Box Units series. It is intended to capture field-level sensor signals and forward digitized measurement data to EtherCAT I/O systems in distributed industrial automation. A rugged metal housing and overmolded connectors allow the module to mount directly on machines, so no additional protective enclosure is required. By adding four differential channels to a machine network, the device expands process-monitoring density without occupying cabinet space.

The module provides 4 analog inputs that are galvanically isolated from the logic domain by a channel-to-control barrier rated at 500 V. Each channel is converted within 140 ms, so the complete block refreshes quickly enough for slow- to medium-speed closed-loop tasks. Raw values are digitized with a resolution of 15 bits plus a sign bit, allowing small voltage changes to be detected even amid electrical noise on the plant floor. The enclosure has an IP65/IP66/IP67 rating for protection against dust and washdown liquids, making the unit suitable for food-processing, packaging, and outdoor equipment. Total linearity, offset, and gain drift remain within ±0.3% of full scale, which keeps sensor accuracy within common process tolerances without separate calibration routines. Ten selectable digital filter modes allow the user to balance response time against improved rejection of power-line or mechanical interference.

A downstream EtherCAT segment or second box connects through one 4-pin M8 socket, while the upstream supply and communication signals arrive through an identical M8 power feed. The analog front end has an input impedance of 80 ?, making it compatible with typical bridge or shunt sources that can deliver modest current. Sensor excitation can be looped from the load circuit at a maximum of 30 VDC, eliminating the need for an additional supply rail. An M12 screw-in port secures field wiring against vibration. A 4 × 16-bit process image is mapped directly into the controller for deterministic data exchange.