Correct if this was a coil operated Relay, I advise anyone to use solid state Relays, which almost all have the diodes built in so no need to fit another one, it does not matter what size the amp rating of the SSD either, they are only being used as a switch simple ON / OFF to control a VFD Drive FWD control, they come in the same form package size, Just pick a quality SSD like Opto 22 or similar
This can not cause any kind of shorting of the output device if you use a SSD, I have been using them this way for more than 30 years and have never seen one fail, because of a short from switching, have some currently on my own machines which are over 15 years old and are still working as when they where installed
Coil operated Relays are a relic of the past SSD is the only Relay any new builder should be using