Dear Experts,

                I requires 8 PWM outputs. If I am not wrong, s7-200 PLC series have only 2 PWM outputs with CPU. Please suggest me any PWM expansion module for s7-200/300   PLC series.

Thanks & Regards,

BMohsin

Hello,

The only module that might possibly be useful to you is the EM 253 Position Module. I believe it only does Pulse Train Outputs (50% duty cycle with variable frequency) so it probably won't be useful to you.

I would suggest buying 3 more S7-200 CPUs.

You could also invest in S7-1200 CPUs which are capable of 4 High-Speed outputs.  S7-1500 might be able to do more but that is out of my range of knowledge.

Dear Experts,

                If I am selecting CPU 313C which is having 3PWM output. Suggest me PWM expansion modules for it.

Thanks &  Regards,

BMohsin

To my knowledge there are no expansion modules for the S7-300.  I am not an expert on S7-300 CPU's so I am basing this assumption off an examination of the document link S7-300 Module data.

I would suggest giving Siemens or a distributer a call. They would have better knowledge of the products that are capable of multiple PWM outputs. I am sure they would be more than happy to sell you some additional equipment.

BMohsin

I requires 8 PWM outputs. If I am not wrong, s7-200 PLC series have only 2 PWM outputs with CPU. Please suggest me any PWM expansion module for s7-200/300   PLC series.

If that was my project, I would use x2 current generation S7-1200 PLCs,
that is networked with onboard Profinet.
What you need is on the CPU just like the S7-200
(if I understand the question).

From the question it is not clear if the pulse width or frequency should vary.
Where the S7-200 could change both frequency and pulse width,
the S7-1200 can vary only one or the other.

If system requirement is real time co-ordinated motion,
the ball game changes.

w