The 6ES7131-6BH00-0BA0 is a Siemens SIMATIC ET 200SP digital input module. It provides eight P‑reading inputs rated at 24 V DC, with a signal‑1 threshold of +11 to +30 V and signal‑0 from −30 to +5 V — standard for industrial sensors and proximity switches. The module occupies a single 15 mm slot in the ET 200SP station and requires a BU type A0 base unit (not included). For two‑wire sensors the base unit alone suffices; three‑ and four‑wire connections need the base unit plus external terminals.
Nominal supply is 24 V DC (rated value), and the module draws 1.7 W typical. That load fits comfortably within the ET‑200SP backplane budget; no special power module required for a handful of DI modules. Diagnostics include group error and per‑channel wire‑break detection. The wire‑break circuit uses an optional 25‑45 kΩ pull‑up resister — handy when working with mechanical contacts or simple encoder outputs. The module also supports I&M data (I&M0 through I&M3) for asset tracking. Input filtering is parameterizable and firmware is field‑upgradeable to V1.1 (current version). Default input delay ranges from 0.05 ms to 20 ms, configurable per module.