PLC specification request

Dear all,

Can I get PLC specification from any website to order new PLC? I want know about what are the points to be considered for preparing a specification of PLC.

Srik

CPU memory
I/O count (i.e. 64 analog inputs, 20 analog outputs, 256 discrete in, 128 discrete out, etc)
I/O voltage levels (24 vdc, 120 vac, 0-10v or 4-20mA analog)
I/O types (sinking or sourcing dc inputs, sinking or sourcing solid-state dc outputs, triac ac outputs, relay outputs, isolated relay outputs, votage or current analog I/O)
CPU communications and number of comm ports required
Desired remote I/O comm link
PLC power supply (AC or DC)
Back-up memory required (EEPROM or Flash)
Programming software requirements (Ladder logic, structured text, sequential function chart, function block, or all of the above)

These are the bare minimum.

Try to revise an existing version of RFQ for control system of another project.