Pump seal fail relay

[Electromatic]

I'm about to wire another new submersible pump with a seal fail electrode. This is the kind where there is only a single wire in the control cable for the electrode. I understand I will need a seal fail relay similar to this: https://cdn.automationdirect.com/static/specs/psfrrelays.pdf

My question is, what do I land on the "Com" (common) terminal of the relay. I think the other side of the electrode is connected to the pump chassis. Would I land the pump ground wire or at least a ground wire from the control panel terminals to this Com terminal?

 

[petersonra]

 

[jerryalan]

The "COM" terminal of the Seal Failure Relay will need to be connected to the metal chassis of the submersible pump (if the pump chassis is already connected to a common or ground, the "COM" terminal can be connected there as well)

Connection of Pump Seal Failure (Seal Leak) Relays in Submersible Pump Applications

Issue: I need to know how to install and connect the wiring for my seal leak probe to a Macromatic Seal Failure Relay. Solution/Resolution: Making the right connections: Seal leak probes are typically built into, or attached to, the submersible pump. Most pumps will have only a single seal leak...

www.macromatic.com