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Parallel connection of open collector outputs



The encoder’s open collector output is used by connecting it to the PLC’s high-speed counter input.
Adding a fast counter to use for another control,
Is it possible to connect in parallel?
The high-speed counter input has a pull-up voltage of 24V and a current of 2 to 5mA for both + common and -common.



The specifications of the TRD series are; output current: 30mA.
Therefore, if the high-speed counter input current of the PLC is 5mA, up to 6 units can be connected. [Output current: 30mA ÷ High-speed counter input current: 5mA]
However, if it is used near the rated upper limit, perform sufficient operation verification.


Related manual

Related keywords

Output current Input current


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