PMDX Forum

General Category => Parallel Port breakout boards, motherboards, and dedicated accessories => Topic started by: Techsavvy34 on April 16, 2015, 02:11:12 PM

Title: PMDX-126 Air Solenoid Relay
Post by: Techsavvy34 on April 16, 2015, 02:11:12 PM

Hey Guys,  It's been a while since I wired a relay and just want to make sure I'm doing it right.  I'm wiring a 120vac air solenoid for my coolant to the relay on the pmdx-126.  Do I wire a live wire to the com terminal and then connect my air solenoids live wire to the NO terminal on the pmdx?  What do I do with the N and gorund wires?

Title: Re: PMDX-126 Air Solenoid Relay
Post by: Bob at PMDX on April 16, 2015, 03:09:59 PM

Generally, we advise connecting the hot (or live) wire to the N/O (normally open) terminal, then connect the COM terminal to the solenoid.  That way, when the relay is open, the hot wire is not connected to any other terminal.  If you were using K2 on the PMDX-126 and wired the hot wire to the COM terminal, it would be connected to the N/C terminal whenever the relay was de-energized.

The N (neutral) wire should go directly from the A/C outlet to the air solenoid.  If the solenoid has a connection for the ground/earth wire, then run that also directly from the A/C outlet to the solenoid.

Bob