Calrec SUMMA, Installation Manual

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CALREC
Putting Sound in the Picture
87
The processing core is fitted with two AC power supply modules. The core will be fully functional on one PSU, however
both should be fitted and fed where possible from separate sources to provide redundancy against both PSU failure and
external power loss.
The operating AC supply voltage is 100 V - 240 V +/-10%.
The inrush current is actively limited to 13 A peak at 230 V (6.5 A at 115 V) per power supply module. This much reduces the chance
of a nuisance trip or fuse blow from a hot start after a momentary brownout or blackout of the AC power.
Active PFC (Power Factor Correction) is employed in the power supplies and the PF (Power Factor) is greater than 0.89 under all
operating conditions.
PROCESSING CORE
Summa Core 240V Operation 115V Operation 100V Operation
Supply Current 0.78 A TBC 1.71 A
Power Factor 0.89 TBC 0.98
Power Dissipation (Heat) 167 W TBC 167 W
Cooling
The core is cooled by fan assisted convection. Fan speed is monitored and system status
warnings are generated if any fan slows or stops.
The Summa Core is fitted with 9 x 40mm low power, low speed and low noise fans, mounted
at the top of the rear of the core outputting air. Air is drawn in through the front panels of the
card modules fitted in the core.
This design allows them to be fitted in bays with no clearance above or below.
At least 50mm (2’) clearance must be maintained at the top of the rear of the cores to allow
the fans / vents to dissipate air. The 4U front panel inlets should not be blocked and allowed
sufficient clearance to maintain cooling.
The core may be mounted in an open bay providing the ambient air temperature is within limits
(see below). The core may also be housed in an air conditioned bay providing the air pressure
is negative. Consult factory for positive air pressure systems.
Operating Ambient Air
Temperature
0°C - 40°C
Note, set fan speed switch to high in PSU modules for 30-40°C operation.
Relative Humidity
5% - 80% Non-Condensing
Acoustic Noise 43 dBA (at 1 m)