Photoelectric switches with TTL output?

[znelson]

I'm in need of photoelectric switches (electric eyes) with TTL +5v/0v
output. Does anyone know a source for these? I don't need anything
with critical tolerances, just something that works like a simple
garage door safety beam.

I've only been able to find Allen-Bradley switches that operate on
+10-40v. So my other question is, let's assume I use them with a 12v
power supply, how can I (easily) turn that into a TTL level signal
(off/on)? I'm a software developer so I'm not very hardware-saavy. The
less wiring and soldering I have to do the better!

TIA!

Regards,

Zach

 

[Spehro Pefhany]

I'm in need of photoelectric switches (electric eyes) with TTL +5v/0v
output. Does anyone know a source for these? I don't need anything
with critical tolerances, just something that works like a simple
garage door safety beam.

I've only been able to find Allen-Bradley switches that operate on
+10-40v. So my other question is, let's assume I use them with a 12v
power supply, how can I (easily) turn that into a TTL level signal
(off/on)? I'm a software developer so I'm not very hardware-saavy. The
less wiring and soldering I have to do the better!

Got a link to a data sheet? Often these things are just open-collector
NPN output and you could just connect it to a TTL input with a pull-up
resistor (something like 1K) to +5V.

Of course if it's not, it could destroy what it's connected to, and
maybe the sensor as well...

Best regards,
Spehro Pefhany

 

[znelson]

Got a link to a data sheet? Often these things are just open-collector
NPN output and you could just connect it to a TTL input with a pull-up
resistor (something like 1K) to +5V.

Of course if it's not, it could destroy what it's connected to, and
maybe the sensor as well...

Best regards,
Spehro Pefhany

Spehro,

Thanks for the follow-up. This is the only data sheet I've been able
to find from Allen-Bradley:

http://www.ab.com/sensors/sensorstoday/pdfs/nov01/nov01_cat_smartsight9000.pdf

I have a sample photoswitch from them, model 9040, but I can't find a
specific datasheet on that model, I think they lump all series 9000
together.

At any rate, this has 4 leads, the supply voltage is 10-40vdc, and
then there's 2 other leads, NPN and PNP outputs at 40vdc max. I don't
know what the difference is between the NPN and PNP output.

I *have* found something I think will work with almost no
modification.

http://www.mpja.com/directview.asp?product=7860+KT

There are 3 leads, the output lead is TTL level 0/5v, so I think this
would work right out of the box for me.

Any thoughts?

 

[Fred Bloggs]

I *have* found something I think will work with almost no
modification.

http://www.mpja.com/directview.asp?product=7860+KT

There are 3 leads, the output lead is TTL level 0/5v, so I think this
would work right out of the box for me.

Any thoughts?

Yeah- if you can't see the difference between a motion detector and a
photo switch then you should stay away from the garage door. Why don't
you make one of those plastic block flower bed borders this weekend
instead....

 

[znelson]

Ok dickface... and while I'm at it I'll pull my cock outta your mom's ass.

 

[GPG]

http://www.ab.com/catalogs/c114/1pho/105884.pd
Use a pullup to 5V on pnp o/p

 

[GPG]

http://www.ab.com/catalogs/c114/1pho/105884.pd
Use a pullup to 5V on pnp o/p

What do you want to do. Suggested opto sensor is (a)expensive (b) a
process sensor. Some people are not helpful, but you should not lose
it.