PMDX Forum

General Category => Parallel Port breakout boards, motherboards, and dedicated accessories => Topic started by: Techsavvy34 on April 05, 2015, 02:30:55 PM

Title: PMDX-126 and Safety Relay E-Stop
Post by: Techsavvy34 on April 05, 2015, 02:30:55 PM

I picked up a safety relay from a friend and was wondering whats the best way to wire this with the PMDX-126?  I'm going to have the stepper motors power supply wired so if the e-stop is hit it triggers the safety relay which is connected to a contactor to cut power to the stepper motor drives.  For the vfd I'm going to use a relay on the safety relay to trigger the vfd to ramp to a stop.  My main question is how should I connect the E-Stop button so that its wired to the safety relay and the PMDX-126's e-stop terminal?  Should I use a relay with two N/C Contacts or can I wire the pmdx-126 e-stop terminal to a relay on the safety relay?  I attached a wiring diagram that I got from the safety relay manual.