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MITSUBISHI ELECTRIC 2033C SERIES UPS
MITSUBISHI
ELECTRIC
2033C SERIES UPS
OWNERS / TECHNICAL MANUAL
Page Number:
2-6
A) Output Contacts (for external alarm annunciation)
Output contacts consist of form “A” dry type contacts. The rated capacity of all output
contacts is 120Vac/0.5Aac or 30Vdc/1Adc. All dry contacts must be operated at their
rated values or lower. Figure 2.7 illustrates a typical installation. The external relay can
also be a lamp, LED, or computer, etc.
FIGURE 2.7 Control Wiring for External Contacts
Details of output alarm contacts :
Terminals 5 to 6 “Summary Alarm” contact
Activated when a fault alarm occurs.
Terminals 7 to 8 “Load on Inverter” contact
Activated when the power is supplied by the inverter.
Terminals 9 to 10 “Load on Bypass” contact
Activated when the power is supplied by the static bypass input.
Terminals 11 to 12 “Battery Operation” contact
Activated when the battery is operating following an AC power failure.
Terminals 13 to 14 “Converter Operation” contact
Activated when the converter is operating.
Terminals 15 to 16 “Battery Low Voltage” contact
Activated when battery voltage drops below discharge end voltage level during
inverter operation (i.e. During AC failure conditions).
Terminals 17 to 18 “Overload” contact
Activated when a system overload occurs.
User supplied
Terminal
UPS Cabinet External to UPS
Cabinet
Rela
y
Coil
Power
Source
Rela
y
Contact
Terminal