7i77 and 12v single ended encoders

Can i connect 12v single ended encoders to 7i77 encoder inputs?

/edit i guess i could put resistor on each leg. Thses are single ended encoders.

The input chips used 26 are protected against +-25V inputs, but 12V is just at the edge of their common
mode range so I'm not sure it would work reliably

Because of the 2K Ohm pullups to +5V on the TTL inputs, its probably best to use a resistor divider with
2 resisitors per input. Because of the 2K pullups this divider should be low impedance, say
12VENC --> 470 Ohm --> 7I77Input -->220 Ohm --> GND

These are Incremental encoders tkw6162 models.

They are 12v, so I will do lik you said and put resistors.

I dont know what kind of outputs they are. I am looking for them.

Looking further details at this site: www.italsensor.com/tkw615c/

PCW wrote:

The input chips used 26 are protected against +-25V inputs, but 12V is just at the edge of their common
mode range so I'm not sure it would work reliably

Because of the 2K Ohm pullups to +5V on the TTL inputs, its probably best to use a resistor divider with
2 resisitors per input. Because of the 2K pullups this divider should be low impedance, say
12VENC --> 470 Ohm --> 7I77Input -->220 Ohm --> GND

Would this be correct?

Yes, that looks correct with one addition, the 12V ground must be common with the 7i77 encoder ground.

I'll try them at 5, then up them to 8 and see if they work

If not I guess I will do the voltage devider option as depicted in the drawing.

andypugh wrote:

bevins wrote:

These are Incremental encoders tkw6162 models.

They are 12v,]

Do they work at 8V? 5V? Might be worth finding out.

Imagine that..... they are working with 5V.

Hello bevins, I would like to know if the voltage divider worked correctly,y I have the same problem (12v encoder), and some other people got lost steps using the Voltage divider, can you give me some advice to make it work correctly thank u.