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IQH4B
User Manual
LEDs
LEDs are provided along the front edge of the Gateway Card, shown in the diagram above.
Power Supply and Module Slot Locations
PSUs
Gateway Card
Module Slots 1 to 20
PS
IQH4B enclosures are designed to accept one or two power supplies with independent IEC320
mains inlets.
Individually, each PSU module is capable of powering the frame containing any combination
of IQ-1B modules subject to the rules described in
Configuration Rules
on page 31. When two
units are installed, the operation of the whole frame becomes protected against single-
instance power failures. The manufacturer specifies a maximum of 50 mating cycles.
Monitoring circuitry built in to each PSU reports power or PSU fan failures via GPO contacts on
the STATUS connectors on the Gateway rear panel, and the single bi-color LED on the front of
each power supply.
29
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