The dual-channel technology module 2 PULSE for controlling actuators and valves now also measures the current that is output in the PWM (pulse width modulation) and pulse train modes and sends the value back to the CPU. This enables simple proportional valves to also be directly connected and precisely controlled. This means a further improvement in the precision of control in isochronous mode. To improve performance the two channels of the module can be switched in parallel, thus providing a current of up to 4 amps. Further modes are frequency output, output of a pulse with a predefined length, and ON/OFF delay.

There is now a new "traversing task" for approaching a specified position on the single-channel stepper motor module 1 STEP. In speed mode the frequency specified by the controller is transmitted to the output taking the acceleration/deceleration ramp into account. This mode is suitable for use with a higher-level positioning control, also in isochronous mode if required. The 1 STEP module has two digital inputs that can be configured as a reference point switch, a limit switch, or as an external start enable.

About Siemens Southern Africa:

Siemens has had a presence in South Africa since 1860 when the company installed the first telegraph line linking Cape Town and Simon’s Town. Today, Siemens offers a balanced portfolio of technologies focusing on the Industry, Energy and Healthcare sectors, together with the cross-sector business of Siemens IT Solutions and Services. The unique ability to offer horizontal, customised, end-to-end technology solutions enables Siemens to keep its customers one-step ahead. As a committed corporate citizen, Siemens has active corporate social investment programmes as well as a comprehensive approach to local content, manpower development, skills and training. Further information is available on the Internet at www.siemens.co.za