MaxPower Corp GE SG Series 10-150kVA - Manual (Page 7)

ISM: Standard S+S Configuration
Intelligent Energy Management Integrated (IEMi)
IEMi is a software package which allows RPA systems to
save energy and reduce operating costs ($) during low
load conditions. Individual inverters, which are not required
to support the load, can automatically be switched off to
save energy costs ($). The IEMi mode can be programmed
for various operating modes and the customer defines the
degree of redundancy required.
Redundant Parallel Architecture™ (RPA) System Options
Competitor’s Centralized Static Bypass System
Non-Redundant:
• Central Control
• Centralized Bypass
• Output Breaker
• Static Bypass Switch
Intelligent Sync Module (ISM)
For System + System (2N) applications, the ISM module is utilized
to synchronize the outputs of two modules or two groups of UPS’s
that are fed from separate and independent sources. This allows
the two systems to be synchronized for down-stream switching.
The ISM is an intelligent control that is mounted external from the
UPS module.
It has the ability to select which system is master and can also
send/receive permissive signals from downstream devices.
Additionally, the ISM follows the same tradition as RPA with
redundancy in all critical components. The ISM communicates via
redundant communication cables and has options for redundant
power supplies and control circuitry.