1/30/2020 3:08 PM | |
Joined: 9/27/2006 Last visit: 9/21/2024 Posts: 12282 Rating: (2684) |
Hello Ziemens; The cost of the different families of S7 PLCs was established on their date of release, and based on their manufacturing costs at that time. S7-300 I/O modules (used with ET 200M distributed I/O stations) were launched around 1995; https://simple.m.wikipedia.org/wiki/SIMATIC The ET 200SP started to be sold around 2010, along with the S7-1500 CPUs, with different electronics and manufacturing designs which lowered the cost of production. That is the sole basis of pricing differences for different families if PLC I/O modules. As far as stability of the ET 200 SP installation is concerned, following the setup guidelines of the terminal modules should ensure they do not separate during use. Look up these guidelines in the Installation section of this manual: Hope this helps, |
Last edited by: dchartier at: 01/30/2020 20:38:08 |
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