Powcon 400SMT foot control wiring.

[ces224]

I have a Powcon 400SMT that I am trying to hook up a foot pedal for tig welding. The foot pedal is a Powcon with a 14 pin connector and the welder has a 17 pin connector. I found this on an old thread for the 14 pin connector on the foot pedal.

To Control Start / Stop of the output, the wiring is:
Pin 10 jumpered to Pin 14 (Output Inhibit)
Pin 8 switched to Pin 9 (Output Start / Stop--Foot pedal switch)

To Control Output Amperage, the wiring to add is:
Pin 11 jumpered to Pin 14 (Front Panel Output Reference Inhibit)
Pin 12 is output to Foot Pedal Pot (+15VDC)
Pin 13 is Amperage Reference Input (Wiper on the Pot)
Pin 14 is Logic Ground (0 VDC, Third Lead on Foot Pedal Pot


The 17 pin connector has pins

Terminal A: +24 VDC out, 100 ma maximum from the control board. Used to power remote control devices.

Terminal B: Control board common; used with remote control devices.

Terminal C: Weld level output; 0-4ma, current loop transmitter.

Terminal D: Weld level input; 0-4 ma, current loop transmitter.

Terminal E: Contactor input; will energize the welding power source when a dry contact closes at B.

Terminal F: Error amplifier enable; active low signal for use with remote V/I control devices.

Terminal G: Chassis common; safety ground.

Terminal H: 115VAC, with respect to pin J protected by 5A circuit breaker on the front panel.

Terminal J: 30 VAC and 115VAC return.

Terminal K: Arc force inhibit; an active low signal will disable the arc force control on the front panel. Used with remote control devices.

Terminal L: Spare

Terminal M: Slope #2; active low signal used with remote devices.

Terminal N: Amperage output signal; 0-4mA current loop transmitter.

Terminal P: Voltage output signal; 0-4mA current loop transmitter.

Terminal R: Blank/Accel commands; logic level signals used with remote control devices.

Terminal S: 30VAC, with respect to pin J. Protected by 10 amp circuit breaker on the front panel.

Terminal T: "B" sync output; an active low signal for use with remote voltage/current control devices.

I think that I need to hook up 8 and 9 to E and B to turn the welder contactor on and off.

I am not sure were to hook up the wires for the pot. My thought is pin 12 foot pedal +15 to pin C weld level output, pin 13 amperage reference input - pot wiper to pin D weld level input, and pin 14 logic ground to terminal B control board common. Any info would be appreciated. Thanks, Chad.

 

[smithboy]

Did you ever get the pedal to work? I'm trying to do the same thing. Any help would be greatly appreciated.

 

[ces224]

Yes I got it to work. pin 12 foot pedal +15 to pin C weld level output, pin 13 amperage refernece input - pot wiper to pin D weld level input, and pin 14 logic ground to terminal B control board common worked. I did have to change the pot to a 10K pot. I wired up the switch on the foot pedal to pin 8 and 9 to control the contacts.