Turck has enhanced the functionality of the digital block I/O modules of its ultra-compact TBEN-S Series in the form of a free firmware update. It comprises the functions for digital filtering, pulse stretching, latched inputs, counters and PWM. All the functions are set up via the engineering software of the controller manufacturer, or alternatively via the module’s own web server or Pactware. The devices can naturally be used as before without any configuration required.
Digital filtering allows the time threshold from which the module detects a signal to be increased from 0.2 to 3 ms. This can prevent the possibility of interpretation faults, particularly in installations subject to severe electromagnetic interference. Pulse stretching is used to lengthen signals that are so short that they can change within the PLC cycle. The latched inputs function enables the module to keep the signal until it is registered and acknowledged by the controller. The counter function is provided on the first input channel of the TBEN-S and is designed for frequencies up to 50 kHz. From now on, digital outputs support pulse width modulation (PWM) with frequencies up to 100 Hz.
For more information, please visit http://www.turck.com.