Sonifex S2 - Fig 3-4: New S2-PSU Rear Panel

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S2 User Handbook
POWER SUPPLY
3
POWER SUPPLY
Increased power eciency, so that less power is drawn and therefore less heat generated.
An improved over-current and over-voltage protection system to give increased reliability
and stability.
A dynamically controlled quiet cooling fan which is only switched on when required by the
load conditions and temperature (greater than 50° C).
A new 1U chassis so it takes up less space in a 19” rack.
A fan failure indicator LED on the front panel so that in the unlikely event that the cooling
system should fail, a visible warning is given with the LED ashing red.
Fig 3-4 : New S2-PSU Rear Panel.
Important Notes:
Please note thatALLconnections to the mixer should be made before powering up the
S2-PSU, otherwise this could trigger the over-current protection. If the over-current
protection kicks in, then the unit needs to be powered down for approximately a minute to
reset the over-current protection.
This 1U sized S2-PSU is incompatible with S2-PSUS power supply switchers with a serial
number of 16948 or earlier. The S2-PSUS has been redesigned (from April 2011) to work
with both 1U and 2U S2-PSU power supplies, but this is only for S2-PSUS switchers with a
serial number higher than 16948. Contact Sonifex if you need to replace a 2U S2-PSU and
are using an S2-PSUS power supply switcher - either a new version of the S2-PSUS will be
required or a 2U S2-PSU power supply will need to be specically requested.
The fan is started and run briey every few minutes to check that it is in operation and to
ensure that it doesn’t freeze through lack of use over time.
Dimensions (S2-PSU) 
(Raw): 48.3cm (W) x 23cm (D) x 4.4cm (H)
19” (W) x 9” (D) x 1.7” (H)
(Boxed): 51cm (W) x 41.5cm (D) x 17cm (H)
20” (W) x 16.3” (D) x 6.7” (H)
Weight (S2-PSU) Nett: 2.9kg Gross: 4.3kg
Nett: 6.4lbs Gross: 9.5lbs