The division of Siemens Industry Automation Division has the two technology modules 1 Step 2 Press and for the Simatic ET 200S, now enhanced and provided with more functions. 2 Press-channel module for controlling valve actuators and can now accurately measure and regulate the output current. In the single-channel module 1 Step for positioning applications with stepper motors, the novelty is the command to move to a certain position.

2 Press-channel module for controlling valve actuators and now measures in ways PWM (pulse width modulation) pulse train and the outgoing, and sends this information to the CPU. This allows direct connection of simple proportional valves and regulate them with precision. Operating in isochronous mode may further improve control accuracy. Furthermore, to increase the power is connected in parallel the two channels of the module, which allows output currents up to 4 amps. Other modes available are: frequency output, pulse output with definable width and delay to the connection and disconnection.

1 Step-channel module for positioning applications with stepper motors now has a "task shifting" to move an axis to a certain position. In speed mode, the frequency specified by the controller output is applied to the respective corrected acceleration or deceleration ramp. This ideal mode of operation is associated with a higher position control, if necessary, also with isochronous operation. 1 Step Module has two configurable digital inputs for signals from the reference position and limit switches as well as enabling the engine running outside.

+ INFORMATION: www.siemens.de / simatic-technology