dseligo Posted August 24, 2023 Report Share Posted August 24, 2023 Is it allowed/safe to connect together transistor outputs from two Jazz PLC's (specifically JZ20-J-T18) or must they be separated with diodes? They would be connected to the same relay. In other words, can damage be made to PLC if 24V is applied to output while it is inactive? They are on the same power supply. Link to comment Share on other sites More sharing options...
MVP 2023 kratmel Posted August 24, 2023 MVP 2023 Report Share Posted August 24, 2023 2 hours ago, dseligo said: Is it allowed/safe to connect together transistor outputs from two Jazz PLC's No, for PNP output two diodes are required for matching and one diode in parallel to the relay coil to avoid self-induction. Link to comment Share on other sites More sharing options...
dseligo Posted August 24, 2023 Author Report Share Posted August 24, 2023 Thank you. Link to comment Share on other sites More sharing options...
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