8xPCs Siemens – 6ES7 121-1BB00-0AA0 – Simatic ET 200SC Electronic Submodule

The Siemens ES ‑BB‑AA (also ES‑BB‑AA) is a compact electronic submodule for the ET SC/ET L distributed I/O system. It provides two isolated digital input channels (sink‑type) designed for signal monitoring in automation and control applications using  V DC sensors.

Key Features:

• Model: ES ‑BB‑AA (ES‑BB‑AA)  

• Function: -channel digital input module, sink type, for ET SC and ET L

• Supply/Input Voltage:  V DC (.– V); rated current ~ mA per channel  

• Input Signal Thresholds:

  • OFF below – … + V

  • ON between  …  V  

• Response Time: .…. ms for both ON→OFF and OFF→ON transitions  

• Max Cable Length: , m (shielded),  m (unshielded)  

• Power Loss: ~. W typical  

• Rack Requirements: Requires TBSC terminal block; occupies slot  

• Dimensions/Weight: Approx.  ×  ×  mm; ~ g

• Form: Spare/field-service packaging ( pcs per pack)