Calrec SUMMA, Installation Manual

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CALREC
Putting Sound in the Picture
89
HYDRA2 MODULAR I/O
Hydra2 Modular I/O
Power
Modular Hydra2 I/O frames are fitted with dual power supplies and have 2 IEC AC power
input connectors. Units will be fully functional on one PSU, however both should be 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 peak inrush current is limited (cold start). This reduces the chance of a nuisance trip or
fuse blow from power up. The RMS quiescent and peak inrush current figures are dependant
upon the quantity and type of I/O cards fitted. Please refer to the Hydra2 installation manual
for more details on modular I/O.
Heat Output and Efficiency
The Heat output from modular Hydra2 I/O units depends upon the quantity and card types
fitted, please refer to the Hydra2 installation manual for more detail on modular I/O.
Cooling
Fans mounted to the PSUs at the back of the core draw air through the PSUs and the core
itself. Air is drawn up through the base of the core which is recessed to allow air to enter
through the side, and for the units to be mounted with no clearance above or below. The
bottom of the sides of the modular I/O box should be unobstructed with at least 50mm (2’)
clearance to allow airflow.
Modular I/O units may be mounted in an open bay providing the ambient air temperature is
within limits (see below). The units may also be housed in air conditioned bays.
Acoustic Noise <27 dB SPL (A-weighted, 1m from front).
Operating Ambient Air
Temperature
0°C - 35°C
Relative Humidity 5% - 80% Non-Condensing