Input / Output Circuits

Common Input circuit

The internal circuit of common input is a bidirectional optocoupler which supports common anode and common cathode configurations. There are 2 types of outputs from master device: Relay output and Open Collector output as shown below.

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Common output circuit

There are 3 common outputs: DO1 and DO2 are single-ended, sharing a common power supply ground terminal; DO3+/DO3- is double-ended, having an isolated 24v power supply.

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  • Power supply is provided by user. Please be aware that reversed power supply polarity might cause damage to the driver.
  • When it is an open collector output, max current: 50mA, max supplying voltage: 25V. Please ensure the switching power supply fulfills the conditions.
  • if the load is an inductive load such as a relay, please connect a flyback diode in parallel in reverse. A wrong installation of the flyback diode might cause damage to the driver.

Probe input circuit

The internal circuit of probe input is a unidirectional optocoupler. Please be aware of the polarity of the terminal when connecting the cables.

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Digital input signal function configuration

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When limit switch or emergency stop is used, POT, NOT and E-STOP signal will be normally close (NC) by default. Please make sure there is no safety concern if these signals need to be set to normally open (NO).