Table of Contents
Advertisement
A) Output Contacts (for external alarm annunciation)
Output contacts consist of form "A" dry type contacts. 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 : TN21-25
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 2" 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 to the system.
Terminals 15 to 16 "Spare" contact (OUT7)
9900D SERIES UPS
OWNERS / TECHNICAL MANUAL
Figure 2.11 Control Wiring for External Contacts
Terminal
Terminal
MITSUBISHI ELECTRIC 9900D SERIES UPS
Page Number:
External to UPS
Cabinet
Relay
Coil
NEC Class 2
Power Source
User supplied
2-10
Advertisement
Table of Contents
