Wash Select II and J-17

[copperglobe]

Looking for someone to explain on a Wash Select II how plug J-17 works. It's the plug that interfaces with the wash's plc. Thanks

 

[JGinther]

Without looking... Guessing its the wash-in-use connection. Typical Car wash is active high or active low.. Meaning the Car wash changes the state of the output to high while washing a car. Drops the output when wash completed. The dropping edge is the signal to the Cashier to load the next wash. On top of that, some equipment will do a 1 second off-on-off then hold off with the signal during a wash fault instance. When the wash is cleared of fault status, then signal will go back to normal. Active low equipment is the same logic - just opposite as far as on vs. off. Older equipment just pulses the output when the wash is complete. That logic still works, but stacking isn't as smooth since the cashier never really knows when the car wash is washing the car - only when its done.

 

[copperglobe]

JG, thanks for the reply and the detailed info. The plug I'm asking about is not the "hand shake" plug but the wash interface plug- J 17. It's the plug that tells the wash's plc what wash was purchased. It's got one "common" port and then 8 other ports (if you can sell 8 different washes). I've got a WSII on a work bench and I can't get that port to work with "idiot lights" that I've hooked up with various configurations. There should be a way that I can set up some lights or meter or something to test to make sure that that output block is working. Thanks

 

[JGinther]

There are lights on the door that indicate when the wash select loads a wash. All the wash select does is connect the common to the wash package terminal momentarily. Ohmmeter between common and package terminal should go coninuous when the wash is purchased for about a second. In other words, it functions as a 'dry contact'

 

[copperglobe]

Thanks. The explains it. I've noticed the lights on the door do activate when loading a wash. I'll put an ohm meter on common and one of the four wash terminals as make sure they're working.

Love the "zip-tie engineer". So true.