9/18/2014 2:49 AM | |
Joined: 6/15/2010 Last visit: 8/1/2024 Posts: 31 Rating: (1) |
The majority of SM 321 / 322 Digital IO modules (24VDC) have an isolation test voltage of 500VDC. The rating also applies to most SM 331 / 332 Analog IO modules I need to meet the below requirements. All analog and discrete I/O shall be optically isolated from transients to a level of 1000 V RMS or greater. Given the term “transient” is used in the requirement, are there any short time isolation ratings (eg: 1 sec) that are available for the modules that would help to meet this requirement? It is assumed that an isolation voltage rating at 1 sec would exceed the Siemens published isolation voltage ratings. |
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