This version of the IS200EPSM is 2A. This means that this model is also not backward compatible. When power is being supplied to the EXTB and ECTB it will be an isolated seventy VDC, the VDC is used for contact wetting. Three self-sufficient power supplies are used to power the C, M1, and M2 controllers. When being powered the power that has come from the EPDM model the IS200EPSMG2A is attached to will be converted to be best used with the module.
The best manuals that are used for installation and powering of the IS200EPSMG2A refer to the GEH-6632 EX2100 Excitation Control Users Guide or the GEI-100462 manual which is specifically used for use with the IS200EPSMG modules.