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Question Is it true you need to add some form of protection when using relay outputs to turn on solenoids or motor contactors?
Answer a. Yes, it is true. Devices with coils, inductive loads, driven by a PLC relay output will generate a voltage spike when it is turned off. b. You should install some form of surge suppression, such as TVS, MOV or Diode, at the coil or as close to the coil of the solenoid (or other device) as possible. c. This is covered in Chapter 2 starting on page 21 of the DL06 user manual. Click here for Chapter 2 of DL06 User Manual.

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This item was last updated on 03-18-2009
Document ID: 1178


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