The 6ES7141-1BF40-0XA0 is a current-production SIMATIC DP expansion module (EM 141) for the ET 200X family. It brings 8 digital inputs at 24 V DC to a single IP66/67 enclosure with M12 connectors — one input per 5-pin connector, no shared channels. That layout keeps wiring clean in washdown zones or vibration-heavy panels, and it simplifies troubleshooting: pull one connector, and only that channel drops.
Mounting and wiring — what lands and what doesn't
Module dimensions: 180 mm tall, 87 mm wide (60 mm panel cutout), 55 mm deep. Unshielded cable run permitted up to 30 m. Watch the permissible quiescent current from a 2-wire sensor: max 2 mA. Most standard inductive prox sensors are below that, but verify if you're using a low-power variant.