Apc 60-80kW User Manual download pdf (Page 12)

12 Installation Guide APC Silcon 60-80kW 400V UPS

990-4051

External Connection

4.2 System Integration Interface

System Integration Interface (SII) is the control link between UPS and system main switches

as shown in above diagram. The purpose of the SII is to ensure correct operation of switches

without losing system output power.

Auxiliary contacts on the main switches transmit the SII board inputs. Lamps on Service

Bypass Panel and Battery Breaker Box/Battery Cabinet indicate “green light” for operation of

output switches.

SII board also integrates input facilities for emergency shut-down and temperature

compensation of charge voltage for external battery (use with battery monitor). “Battery

operation” and “Common fault” are two main SII board status relay signals.

NOTICE!

Consistent use of designations (Q001, Q002, Q003, H002, H003) in diagrams simplifies

information exchange.

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Apc 60-80kW User Manual Page 12