Threaded View
-
12-10-2016 #1
Hi Guys
I am using NPN Proximity switches from here and a 5v BOB from Zapp Automation . I fitted a 2.4k ohm resistor between the black signal wire and the blue (-ve line) and connected up to a 24v dc power supply. When the switch is open, the voltage between the signal wire and the blue line is 4.5v ok I think for the input to the BOB. When the switch is closed, it drops to 0.7v - measured using a DMM and the LED on the back lights up. I connect the black wire to pin 10 of the BOB and the blue wire to the GND. When I activate the switch, the LED does'nt light and nothing is detected via the diagnostic screen of MACH3. And yes the port & pins is set for the Home to pin 10.
The 24v power supply buzzes and the indicator LED on it goes out. What have I done wrong?
Thanks
MikeLast edited by MikeyC38; 12-10-2016 at 09:52 PM.
Thread Information
Users Browsing this Thread
There are currently 5 users browsing this thread. (0 members and 5 guests)
Similar Threads
-
Proximity limit switch problems
By davrich in forum General ElectronicsReplies: 16Last Post: 12-03-2018, 01:58 PM -
Wiring 3 wire proximity switches in series
By mikem in forum General ElectronicsReplies: 6Last Post: 02-05-2016, 09:33 AM -
3 wire proximity switch help
By mikem in forum General ElectronicsReplies: 24Last Post: 06-10-2015, 03:24 AM -
Proximity switch NPN or PNP
By Matt81 in forum General ElectronicsReplies: 9Last Post: 19-04-2014, 11:38 AM -
Proximity Wiring Problem
By Bruce in forum General ElectronicsReplies: 7Last Post: 13-01-2014, 07:21 PM
Bookmarks