SINAMICS V90 - Encoder output (TTL) S7-1200 HSC (HTL)

I have a positioning system based on S7-1200 and Sinamics V90 + 1FL6061-1AC61-0AB1,

two axes, control - Pulse / Direction Interface.

similarly as in the example

SINAMICS V: Controlled Positioning of a V90 with S7‑1200 via the Pulse/Direction Interface, with HMI (Set 7)

https://support.industry.siemens.com/cs/ww/en/view/77467940

for control Pulse / Direction Interface I use 2 fast digital output (for each axis),

SB 1222 DC 200 kHz 6ES7222-1BD30-0XB0.

the example does not use position feedback, but I would like to use signals from the motor encoder,

Sinamics V90 has an encoder output (TTL 5V), 6 outputs (A+,A-; B+,B-; Z+,Z-),

And I would like to read it,

S7-1200 have High-Speed Counters (HSC) x6 pcs., to each HSC can connect 3 digital inputs (eg., A+, B+, Z+), for two axes I need 2xHSC (6 digital inputs),

the problem is that encoder output from Sinamics V90 TTL (5V DC),

and HSC S7-1200 HTL 24V DC, we have different voltages,

of course I could use an additional card 5V DC (eg. SB 1223 DC/DC 200 kHz 6ES7223-3AD30-0XB0),

but I'm already using SB for fast digital output SB 1222 DC 200 kHz.

What can you advise me?

What kind of equipment (converter TTL/HTL) required?

Mister T

•  Buy a signal board to read the 5V encoder inputs of SINAMICS V90

 how do you think I could use a EMB-Signal splitting 

http://www.bbn.com.tw/pdf/EMB.pdf

converter TTL->HTL...

Mister T

Hello,

sorry, but I have no experience with these converters, so I can't say anything about it.

I think, the best way for you is to switch to S7-1217C CPU to use the differential I/Os like shown in the application examples.

Another way to solve the problem could be to use SINAMICS V90 with PROFnet-Interface. Why don't you do that?

 because we already have this equipment

 - S7-1200 CPU 1214C 6ES7214-1AG40-0XB0

- Sinamics V90 - 6SL3210-5FE10-8UA0 (Pulse train version (PTI), without PROFINET)

so, we have to use what we have