Siemens PLC

Hello experts,

Can any one suggest a cost effective system for the following configuration. I wish to use S7-300 am I correct?

CPU-1
DI-96
DO-64
AO-8
AI-24

HMI-with serial communication

Sandy

Use an IM151-8 for the CPU.
And use ET200S modules for the I/O.
Drop the HMI with "serial communication". Go ethernet all the way. Siemens have some reasonable cost effective "basic" panels from 4", 7", 9" to 12".

So that would be:
CPU IM151-8
Power module.
12 x DI8
Power module
8 x DQ8
Power module
12 x AI2
4 x AQ2

That can fit in one rack, approximately 750 mm wide.

I just realised that I dont know what your application is.
The IM151-8 has the approximate performance of a 315, and 192 kB memory. Enough if your program does not contain too complicated code or need a very fast scan cycle.

Also, for the digitial outputs, you may have to calculate the power demand and possibly split into groups each with its own power module.

If economical is important, and it has to fit into the Siemens world, a VIPA PLC may be worth a look. Programmable with the Siemens software, but the hardware cost is generally significantly cheaper.