The Siemens 6ES7131-6CF00-0AU0 is an 8-channel digital input module for the ET 200SP distributed I/O system. It accepts 2-wire sensors and reads P-switching inputs, with a rated supply of 48 V AC/DC (24 V/48 V AC at 50/60 Hz also supported). Each channel can sink up to 1 A continuously at 60 °C, making it suitable for driving small solenoids or indicator loads directly without an external relay.
Mounting & Integration
The module is 20 mm wide and 73 mm tall, fitting the ET 200SP base unit type U0. It requires a potential distributor module for 3-wire or 4-wire sensor connections. Unshielded cable runs up to 600 m are allowed; shielded runs extend to 1 000 m. The isolation is tested at 1 200 V DC between the supply voltage and the backplane bus.
Electrical Characteristics
Signal thresholds: a logic '0' is detected for AC/DC below 10 V; logic '1' requires AC above 14 V or DC above 34 V. Typical input current at signal '1' is 3.5 mA. Switching delays are 15 ms max for 0→1 and 20 ms max for 1→0. The module draws 1.5 W typical from the backplane. Diagnostic alarms and group error reporting are supported; firmware version is V0.0 and is not field-upgradable.