EXS
User Manual 10H52260UM60 - Rev. 1 - 10/2017
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Figure 1-7 ECO operating mode line diagram
Warning
The load is not protected against distortion on the mains voltage waveform in ECO mode.
Parallel redundancy mode (system expansion)
For higher capacity or higher reliability, or both, the outputs of multiple UPS modules can be programmed for
directly paralleling while a built-in parallel controller in each UPS module ensures automatic load sharing. The
parallel system may consist of up to four UPS modules. For the operating principle diagram of parallel redundancy
mode, see Figure 7-1.
LBS mode
A dual bus system consists of two independent UPS systems, each containing one or more parallel UPS modules.
The dual bus system provides high reliability, which makes it suitable for use with loads having multiple input
terminals. In the case of single-input loads, an STS may be installed to power the load. For the operating principle
diagram of LBS mode, see Figure 7-4.
Common battery string mode
In this mode, when the UPS modules (up to four UPS units) are connected in parallel, they share the same battery
string thus providing cost and space savings.
Note
Never use batteries having different brands, type or capacities in the same system. Common battery string mode is suitable
for parallel systems only, and is not compatible with LBS mode.
1.5
Battery Management
The following battery management functions are set by the service engineer using the VERTIV setting software.
Normal Function
1. Constant current boost charge
Uses a constant current (within battery charging limit) to charge the battery. This function can be used for fast
battery capacity recovery. It is possible to modify the value of the charge current.
2. Constant voltage boost charge
Uses a constant voltage to charge the battery. This function can be used for fast battery capacity recovery. In the
case of VRLA batteries, the maximum boost charge voltage should not exceed 2.4V/cell.
3. Float charge
Bypass input switch
Rectifier input switch
Bypass input
Mains input
Battery charger
Output switch
Inverter
Rectifier
Static switch
UPS output
Battery
Automatic inverter switch
