Clear-Com HX System Frames - Manual (Page 121)

11.1.2 Spare parts
To facilitate quick repair of the system with minimum downtime, Clear-Com recommends
keeping the following spare system components in good working condition at all times:
• One CPU card.
• One CPU interface card.
• One external PSU.
• One of each type of intercom panel in the system.
• One of each type of interface in the system.
• One fan card assembly.
• One PSU card assembly.
11.2 Fail-Safe modes
High reliability is one of the main objectives of the Eclipse HX-Delta system design. The
following features of the system minimize the effects of a component failure.
11.2.1 Dual power supplies
The Eclipse HX-Delta matrix includes two external power supply units. One power supply
unit can power an entire matrix; the second unit provides a backup in case of an equipment
failure.
In addition, the two supplies have separate IEC connectors to AC mains power, and are
designed for completely automatic and transparent changeover between supplies in the
event of a power failure on one of the AC branches.
To reduce the risk of electric shock, plug each of the power cords to
separate branch circuits with different service ground.
The power supplies contain a health sensor that is connected to both an audible alarm and a
warning light, giving the system operator the necessary forewarning to diagnose and correct
any power anomalies while the system remains operational.
If any individual power supply fails, an alarm can be issued to a remote location to alert
operators that part of a power supply has failed. The failure of a single supply will issue an
alarm, but the Eclipse HX-Delta system will continue to operate normally, powered by the
second supply.
The internal PSU assembly also has dual redundancy as a precaution against failure.
121 Eclipse HX-Delta User Guide