The Siemens 6ES7193-6BP20-0BC1 is a SIMATIC ET 200SP BaseUnit Type C1 (BU20-P6+A2+4B) that anchors a single I/O module in a distributed control cabinet. It carries 16 process terminals to the Pro slot and two terminals each to the and power buses, plus two AUX terminals bridged to the left for 230 V auxiliary distribution. The push-in terminals accept 0.14 to 2.5 mm² conductors, which keeps wiring time down on a panel build — no screw torque to verify.
Bus ratings and thermal limits
Both the AUX bus and the / bus are rated for 230 V, with a maximum continuous current of 10 A each. The process terminals are rated 5 A generally, with terminals 5 and 6 carrying 10 A — useful when you need to feed a higher-current actuator or sensor directly from the base unit rather than running a separate supply pair. Horizontal installation is good to 60 °C; vertical installation derates to 50 °C max. That 10 °C penalty matters if the cabinet airflow is stacked vertically.
The base unit is 20 mm wide, 117 mm tall, and 35 mm deep — a slim footprint that leaves room for additional I/O slices on the same DIN rail. Automatic encoding (FS10 and higher) eliminates the risk of swapping a module into the wrong slot during commissioning. The optional system-integrated shield connection is a plus for analog or fast-signal channels where noise coupling is a concern.