BP Series 1 - Replacement Relays?

[bbuonomo]

ok, don't laugh... Seriously....

I had a student carefully remove the logic power supply and clean up the inside of the machine (think 30 years of grease and gunk)

Then I came along and praise him on what good job he did and I just HAD to try and fit the PC case inside the cabinet to see what the clearences are.

Well, after taking out the PC case, said student yells at me for cracking the tops of BOTH relays. It look slike one is a 12v Relay and the other is a 24v relay.

Can someone please let me know what parts I need to buy now? They may still work, but I'd much rather have the plastic enclosures intact before running the machine again.

Please stop laughing.....

Thanks Brian

[jderou]

they are pretty standard ice cube relays. check Mcmaster carr, or MSC, or Grainger, or anything with electrical supplies. They probably do still work though.

[bbuonomo]

problem is, the tops cracked, i can't make out the part numbers.....

[NC Cams]

Take them to Grainger, hand the pieces to the counter technician and tell him/her to "Gimme one of each or these.... only not broken"

They surely have done THAT before - if not, it might make their day and get you awarded the "fool of the week".

You might want to have the relay voltage buss information handy (5, 12 or 24vdc or vac) - don't make them work TOO hard.

Dubious honor if there ever is/was one.

[bbuonomo]

Said student noted that one is 12v and one is 24v, that's all I know, someone has to have the right part number somewhere.

[keebler303]

the next time i am home will be wednesday night i can check what mine are if you still need them by then. I will try to make out some numbers if i can.

Matt

[NC Cams]

Dont' just replace the relays - show the kids how to reverse engineer them - it could come in handy later on in life, especially if you don't have ready access to CNC ZOne.com for a plug and play P/N.

Namely, use an ohmeter to measure the coil resistance - chances are the one with more resistance is the 24vdc one. You can also show them how to measure NO vs NC.

That is how I'd turn a dumb-out into a learning experience more signfiigant that how to plug in a spare relay.

Besides, you need to do something to regain the aura of 'coolness under pressure' in the eyes of your students and this is one sure way how to do so.

[bbuonomo]

I'm not concerned about coolness under pressure, honestly there is no pressure. The relays are intact and will most likely work. I didn't get a chance to test continuity on them, but upon physical inspection they look good.

My concern is that having a cracked casing in the relays could allow a short to occur. Top priority is safety, but for my students and the machine. So my major concern, which I pass to my students, is if you can't do it right don't do it at all. So the machine doesn't run until the proper part is known and available.

I have no problem chekcing catalogs, but I'm still not ordering anything unless i can get a confirmation that I'm getting the right part.

Keebler thanks for the help.

[bbuonomo]

ok, so I came into work this morning and just had to figure this relay thing out.

After puuting the little plastic pieces together from both relays I came up with the following information:

AMP or AMF
Potter and Brumfield
KRP14D 12vDC (left relay)
KRP14D 24vDC (right relay)
11-pin socket.


Mcmaster has:

Standard Relays:
12 VDC 126 mA 7170K44 13.00

24 VDC 56 mA 7170K12 13.00


Premium Relays:
12 VDC 100 mA 7580T44 18.49

24 VDC 51 mA 7580T12 19.08

mA are power consumption, all relays are rated for 10AMP @ 240 VAC

[Eric]

Originally Posted by bbuonomo ok, so I came into work this morning and just had to figure this relay thing out. After puuting the little plastic pieces together from both relays I came up with the following information: AMP or AMF Potter and Brumfield KRP14D 12vDC (left relay) KRP14D 24vDC (right relay) 11-pin socket.

FYI....here is the data sheet for these relays from Tyco Electronics.

http://relays.tycoelectronics.com/da...ts/KRPA_DS.pdf

www.digi-key.com carries both of the 12V and 24V coil relays.

Here is the catalog page for digi-key:
http://dkc3.digikey.com/PDF/T063/1646-1651.pdf

PB173-ND KRPA-14DG-12 $15.74
PB174-ND KRPA-14DG-24 $15.74

[bbuonomo]

Thanks!

Brian