![]() ![]() ![]() ![]() ![]() ![]() |
||
![]() |
||
![]() ![]() ![]() ![]() This board is for PLC Related Q&A ONLY. Please DON'T use it for advertising, etc. |
||
![]() |
![]() |
#1 |
Member
![]() ![]() Join Date: Mar 2009
Location: Ontario
Posts: 205
|
Touch / Continuity Sensing
Looking for some ideas on sensing contact between 2 metal parts.
The application is a part gauge fixture. The gauge and part are both conductive metals. There is an aluminum test tool that is isolated from the rest of the gauge. We need to sense if that tool comes in contact with the part and turn on a light. We have been using Omron D5C-1DA0 touch sensors for this. Works reasonably well, although can be a bit sensitive to set up. These sensors are now being discontinued so we're looking for another solution. The toolmaker's suggestion has been to use a 5vdc source to a relay coil. Could connect the 0vdc to the fixture chassis and run the 0vdc of the relay coil to the isolated tool. Of course this would work but in my view this is a shock hazard for the operator when loading the part. Unless there's a way to limit the current to <1mA. (Still don't know what my electrical inspector would say) Seems there must be a solution on the market for this but I've search several industrial sensor suppliers and so far no success. |
![]() |
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
Thread Tools | |
Display Modes | |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
problem in touch panel (ESA,505w) | harrydeharry | LIVE PLC Questions And Answers | 7 | August 24th, 2017 06:48 AM |
PView+ 700 (Touch and Keypad) Disabling Touch? | dipan | LIVE PLC Questions And Answers | 3 | July 25th, 2016 11:32 AM |
Why do industrial panel manufacturers use resistive touch ? | JesperMP | LIVE PLC Questions And Answers | 18 | May 9th, 2014 07:28 AM |
broken Touch screen of C7-635 Touch | control_eng2001 | LIVE PLC Questions And Answers | 5 | June 25th, 2009 06:54 PM |
CP340 communication with proface touch screen | sttchui | LIVE PLC Questions And Answers | 1 | September 3rd, 2008 04:39 AM |