Pluggable Terminal Blocks

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Pluggable Terminal Blocks

Postby twehr » Thu Mar 10, 2011 2:04 am

We have all seen plenty of the green terminal blocks that are so common on our laser power supplies, some of our motor drives, and other electronics but it is not always easy to find extra blocks for our projects.

I have been searching for awhile for the specific one that fits my motor drives (2M542 from LightObject) and the laser power supply. As I build my new laser (BuildLog.net v2.x), I want some extras so I don't have to completely cannibalize my current system till the last moment. I also plan to build the new one to accept a couple of different controllers, so extras that I can just plug and unplug will be handy. But where to find the right ones.

Bart directed me to one brand and a source but there are several sizes, some deceptively close.

For the 6-pin pluggable terminal block that fits my equipment, I found the following and thought others may be interested.

Allied Electronic http://www.alliedelec.com carries the Altech brand - Allied PN 502-0427 (pic attached) at a cost of $3.06 ea. They also carry mating horizontal and vertical headers if you are needing that for one of your own designs - H = 502-0293 @ $.91 and V = 502-0390 also @ $.91.

BE CAREFUL - there are also models with 5.00 spacing instead of the 5.08. AND there are 3.00 mm spacing mini pluggable terminal blocks. Be sure which you need for your application. But all can be found at Allied. I think they are on pages 293-296 of their online catalog.

(EDIT 3/10/2011 - I mistyped the part number for the plug - should be 502-0427 but I had a 5 in place of the 4. Now corrected.)
tim
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502-0427.png
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Last edited by twehr on Thu Mar 10, 2011 1:46 pm, edited 1 time in total.
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Re: Pluggable Terminal Blocks

Postby macona » Thu Mar 10, 2011 4:41 am

I used those connectors on a couple of my recent boards. Several companies make them and I have always referred to them as Phoenix connectors since they are one of the most common manufacturers of them. Weidmuller also makes them. They can get a bit spendy.
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Re: Pluggable Terminal Blocks

Postby bdring » Thu Mar 10, 2011 3:22 pm

One thing to watch out for is the shape of the mating pieces. Some have a tall protrusion off the center of each contact like this picture.

502-7000.jpg
502-7000.jpg (7.15 KiB) Viewed 15825 times


FYI: In my experience Phoenix is quite a bit more expensive than some of the other brands.
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Re: Pluggable Terminal Blocks

Postby twehr » Thu Mar 10, 2011 3:57 pm

bdring wrote:One thing to watch out for is the shape of the mating pieces. Some have a tall protrusion off the center of each contact like this picture.

502-7000.jpg


FYI: In my experience Phoenix is quite a bit more expensive than some of the other brands.


You are right. The only place I have noticed that profile is on the Mini plugs (3.00 mm spacing) - like we have on the DSP card connects. Again - everybody needs to be very careful when ordering, as so many look alike. Even the one I quoted is 5.08 mm spacing, but there is another that is 5.00 mm spacing. Might work, but...
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Re: Pluggable Terminal Blocks

Postby twehr » Thu Mar 10, 2011 4:23 pm

They can be pricey. I just ordered mine from Allied. Of course I then immediately found another brand at Digikey that is only about 60% ($1.82 vs $3.06) the cost. They don't show a pic but the specs are the same and there is a drawing in the data sheet - should be the same.

http://parts.digikey.com/1/parts/1429446-term-block-plug-5-08mm-6pos-osttj065153.html

Guess the lesson is... look around.
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