Query on SM 321/322/331/332 Electrical isolation from transients to a level of 1000VRMS or greater

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.