Yes, european color code is brown=V+, blue=gnd, black=output. With NPN, load is referenced to V+, with PNP, load is referenced to gnd.
-- Ralph ________________________________________ From: Peter C. Wallace [[email protected]] Sent: Wednesday, May 11, 2022 2:00 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Do pnp prox switches need a pulldown load R? CAUTION: This email originated from outside the Walla Walla University email system. On Wed, 11 May 2022, gene heskett wrote: > Date: Wed, 11 May 2022 16:43:59 -0400 > From: gene heskett <[email protected]> > Reply-To: "Enhanced Machine Controller (EMC)" > <[email protected]> > To: "Enhanced Machine Controller (EMC)" <[email protected]> > Subject: Re: [Emc-users] Do pnp prox switches need a pulldown load R? > > On Wednesday, 11 May 2022 16:19:58 EDT Peter C. Wallace wrote: >> On Wed, 11 May 2022, gene heskett wrote: >>> Date: Wed, 11 May 2022 16:13:58 -0400 >>> From: gene heskett <[email protected]> >>> Reply-To: "Enhanced Machine Controller (EMC)" >>> >>> <[email protected]> >>> >>> To: [email protected] >>> Subject: [Emc-users] Do pnp prox switches need a pulldown load R? >>> >>> Greetings all; >>> >>> Peter in particular, >>> >>> This is my first try at utilizing a prox switch, and while the led on >>> it responds just fine on 12 volts, I measure around 6 volts on the >>> blue wire when its off, and only 7.1 volts when its fired. With >>> +12.0 volts on the red wire. These are "PNP" switches. >>> >>> So I'm assuming my 10 meg meter is not enough load to pull it down >>> when its off. So what value of loading R to common is needed to make >>> it properly register to a field input of a 7i76 useing a 12 volt >>> field power src? >>> >>> Is that 7 volts enough to make a field input reliably see a logic >>> one? >>> >>> Thanks all. >>> >>> Cheers, Gene Heskett. >>> -- >>> "There are four boxes to be used in defense of liberty: >>> soap, ballot, jury, and ammo. Please use in that order." >>> -Ed Howdershelt (Author, 1940) >>> If we desire respect for the law, we must first make the law >>> respectable. - Louis D. Brandeis >>> >>> >>> >>> >>> >>> _______________________________________________ >>> Emc-users mailing list >>> [email protected] >>> https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=05%7C01%7Cralph.stirling%40wallawalla.edu%7C5c11b0eb146b4bbda7aa08da33914c2e%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637878996392348831%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=oC6Qmu4%2Fb8SlJK0trdv%2FgXmjYebHvewa5MYRiaApO0I%3D&reserved=0 >> >> Sounds faulty or mis-wired > No docs, fleabay purchase. I'm assumeing the black wire is common, the > red wire is the 9 to 30 volt supply, and the blue wire is the output. > > Right? > > And its drawing over 120ma when fired, and if I leave it fired for 10 > minutes it will burn my hand to touch it! This is true even if the blue > wire is floating. If it draws excess current when on, it may be that blue is GND and black is the output... Peter Wallace Mesa Electronics _______________________________________________ Emc-users mailing list [email protected] https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=05%7C01%7Cralph.stirling%40wallawalla.edu%7C5c11b0eb146b4bbda7aa08da33914c2e%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637878996392348831%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=oC6Qmu4%2Fb8SlJK0trdv%2FgXmjYebHvewa5MYRiaApO0I%3D&reserved=0 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
