Digital input module for ET 200SP
The Siemens 6ES7131-6BF01-2BA0 is a digital input module for the SIMATIC ET 200SP distributed I/O system. It provides 8 inputs that read at 24 V DC, with a signal "1" threshold between +11 and +30 V and a signal "0" range of -30 to +5 V, giving clean noise immunity on the line.
Width and wiring constraints
The module occupies a single 15 mm wide slice on the ET 200SP rail, with a depth of 58 mm and height of 73 mm. It mates exclusively with BaseUnit type A0, which handles 1-wire, 2-wire, and 3-wire sensor connections; a 4-wire connection requires an additional potential distributor module. Unshielded cable runs up to 600 m are permissible; shielded cable extends the reach to 1000 m. The module draws 1 W typical from the 24 V backplane when all 8 inputs are supplied via the encoder supply.
Diagnostics and parameterization
The module supports module-wise wire-break and short-circuit diagnostics, with a diagnostic alarm on fault. I&M data from I&M0 to I&M3 is available for asset tracking. Input filtering is parameterizable between 0.05 ms and 20 ms for both rising and falling edges, allowing debounce tuning to match the sensor type.