Insulation Monitoring Device

Hi every one & happy new year.

One questión.

With the big brothers of sinamics use Bender to monitoring isolation. My question is for the Micromaster 4, (MM420 / 430 / 440) & Sinamics G120. Any one knows other system for this small drives? (to control isolation or we must use Bender too).

http://support.automation.siemens.com/WW/view/en/36280112

Thanks in advance.