SMARTZONE UPS USER MANUAL
17
port is used for UPS core Firmware Updates.
USB Coms Port (USB)
All units include a USB serial communications port. This communication port is reserved
for “Future Use”.
Input Power Cord (INPUT)
Each UPS Model may have a unique power input connector, labeled INPUT. Refer to
the corresponding Product Specification Sheet for detailed definition.
Chassis Ground Connection Point ( )
All units have a chassis ground connection, labeled with a ground symbol. This is used
to ground the UPS and EBP chassis to the rack/cabinet. For safety and proper
grounding procedures, this grounding connection point must be connected to the
rack/cabinet ground.
Output Receptacles (GROUP1, GROUP2, GROUP3)
Each UPS Model has unique groups of power output connectors, labeled GROUP 1 and
GROUP 2. Some UPS Models may also have a GROUP 3 outlet group. The following
sections define typical output receptacles. Refer to the corresponding Product
Specification Sheet for latest detailed definition.
EBP Connector (BATTERY CONNECTOR)
All units have an External Battery Pack (EBP) power connection to connect to an
external battery pack labeled
±
120Vdc or
±
240Vdc. Each UPS Model has been
calibrated to a specific EBP and EBP Operating Voltage. The EBP units are not
interchangeable due to the operating voltage. The 5-10kVA single-phase UPS units
utilize the 240Vdc (
±
120Vdc) EBP. The 10-20KVA 3-phase UPS units utilize the 480Vdc
(
±
240Vdc) EBP.
Maintenance Bypass Signal Port (MAINT.)
All units have a Maintenance Bypass Signal port, labeled MAINT. This port is used to
detect if the external Maintenance Bypass Switch breaker (P/N UMB20K) is in the
opened or closed position/status. The opened position means that utility power is
switched to be fed to the input of the UPS. The closed position means that all power has
been removed from the UPS so it can be removed from the system to perform periodic
maintenance. The external Maintenance Bypass Switch is only supported on the 10-
20kVA 3-Phase UPS platform. This port should be unconnected on all 5-10kVA single-
phase UPS units. This port should be unconnected on all 10-20kVA 3-phase UPS units
when no external MBS is present in the system and should be connected to the MAINT
