Options
25
4.2 LBS Mode (Load Bus Synchronization)
The function of LBS is to keep the output of two independent UPS systems (single unit or multiple
unit) in synchronization even when the two systems are operating in different modes (bypass/
inverter) or on batteries. It is usually used with an STS (Static Transfer Switch) connected to the crit-
ical load to achieve dual bus configuration.
4.3 Battery Start (Optional)
With this option, the NX UPS can be started with power supplied only by the batteries (at charged
condition). This type of start, in the absence of utility power, allows independent utilization of battery
power and provides for higher availability in some circumstances.
Figure 16 Options diagram
!
CAUTION
In LBS configuration, both units must be supplied from the same utility source.
!
CAUTION
Before attempting to start the UPS without utility power present, ensure that the batteries
are fully charged—over 2.1V per cell—and will supply adequate run time to the load.
Dry Contactor
DB9
DB9
Phoenix
4 Pin
Intellislot-1
Intellislot-3
Intellislot-2
RS232
RS232
RS232
RS232/Modem
RS232 Modem
Compatible Design
RS485/232
Converter
RS485/232
Converter
SCI Channel 3#
RS232
SCI Channel 1#
SCI Channel 2#
RS485 Bus-1/2
Insulation Gap
To Next Page
Loading...
Need help?
General
