Figure 2.11 Control Wiring For External Contacts - Mitsubishi Electric 9900B Series Owner Technical Manual

MITSUBISHI
ELECTRIC
A) Output Contacts (for external alarm annunciation)
Output contacts consist of form "A" dry type contacts. The rated capacity of all output
contacts is NEC Class2 (30Vdc/1Adc). All dry contacts should be operated at their rated
values or lower. Figure 2.11 illustrates a typical installation. The external relay can also be
a lamp, LED, computer, etc.
UPS Cabinet
Relay
Contact
Details of output alarm contacts: TN2
Terminals 1 to 2 "Summary Alarm" contact
Activated when a major fault has occurred with the system.
Terminals 3 to 4 "Load on Bypass" contact (OUT1)
Activated when the power is supplied from the static bypass input.
Terminals 5 to 6 "Load on Inverter" contact (OUT2)
Activated when the power is supplied by the inverter.
Terminals 7 to 8 "Battery Operation" contact (OUT3)
Activated when the battery is operating following an AC power failure.
Terminals 9 to 10 "Converter Operation" contact (OUT4)
Activated when the converter is operating.
Terminals 11 to 12 "Battery Low Voltage" contact (OUT5)
Activated when the battery voltage drops below discharge end voltage level
during inverter operation (i.e. during AC fail condition).
Terminals 13 to 14 "Overload" contact (OUT6)
Activated when an overload has occurred in the system.
Terminals 15 to 16 "Spare" contact (OUT7)
Terminals 17 to 18 "Total Alarm" contact (OUT8)
Activated during major fault, minor fault and alarm events.
Terminals 19 to 20 "52C Close" contact (OUT9)
Activated when the inverter output contactor 52C has closed.
MITSUBISHI ELECTRIC 9900B SERIES UPS
9900B SERIES UPS
OWNERS / TECHNICAL MANUAL

Figure 2.11 Control Wiring for External Contacts

Terminal
Terminal
Page Number:
External to UPS
Cabinet
Relay
Coil
NEC Class 2
Power Source
User supplied
2-11