What this module is — and what it means for your shutdown window
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. That 55 mm depth is shallow enough for most compact junction boxes, but the height means gland plates need clearance above the M12 connectors. 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.