Apc SILCON 990-4053 User Manual download pdf (Page 11)

External Connection

990-4053

Installation Guide APC Silcon 480kW 400V UPS 11

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 SILCON 990-4053 User Manual Page 11