Figure 2.11 Control Wiring For External Contacts - Mitsubishi Electric 9900CX SERIES Owner Technical Manual

Inclusive parallel operation system application

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Table Of Contents

Table of Contents

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)

Terminals 17 to 18 "Total Alarm" contact (OUT8)

Activated during major fault, minor fault and alarm events.

Terminals 19 to 20 "52C Close" contact

Activated when the inverter output contactor 52C has closed.

MITSUBISHI ELECTRIC 9900CX SERIES UPS

9900CX SERIES UPS

OWNERS / TECHNICAL MANUAL