Which S7-300 should be chosen

Hello Yassinivic;

One suggestion: You could start by looking at the following Product Support page:

This CPU can easily handle the number and type of IO you mention (and more), it has conformal coating for harsh chemical atmosphere and is certified to 60 degrees C (this is what the Siplus designation refers to).

Itcan also be used as a FailSafe CPU (with a Failsafe program based on a seperate package called Distributed Safetyand Failsafe IO modules). See here for more information on the subject:

It has onboard Profibus-DP and Profinet ports, which gives you some flexibiility as far as protocols are concerned (the Profinet port will communicate with TCP/IP partners, and with an additional license will setup a Modbus/TCP connection). Check ifbthese protocols are available on your expected partmers in your project,

Look at the documentation proviided in the Entries tab and the Technical Data shown in its own tab for more details.

Hope this helps,

Daniel Chartier

Hello Shazin;

Siplus standard CPUs from the S7-300 family work at up 7- 70 degrees, but Siplus FailSafe CPUs are only rated to 60 degrees C.

See for example:

S7-315-2PN/DP 6AG1315-2EH14-7AB0is rated to +70 degrees C

S7-315F-2PN/DP 6AG1315-6FF04-2AB0is rated to + 60 degrees C

For information on SIMATIC S7 see also Catalog ST 70:

http://www.automation.siemens.com/salesmaterial-as/catalog/en/simatic_st70_complete_english_2013.pdf

You will find in the catalogthat only standard CPUs in all s7 families can operate at +70 degrees C. So the OP will have to decide if the FaiSafe option is a must, or if the temperature requirements prevail.

Hope this helps,

Daniel Chartier