SONIFEX S2-PSU S2 Mixer Power Supply

SONIFEX S2-PSU S2 Mixer Power Supply

The new 1U sized S2-PSU is pin compatible with the original 2U sized S2-PSU power supply, so can be used as a straight like-for-like swap, using the same connection cables. The new units have a serial number greater than 16852 and have a great deal of improvements on the original design:

1. Increased power efficiency, so that less power is drawn and therefore less heat generated.
2. An improved over-current and over-voltage protection system to give increased reliability and stability.
3. A dynamically controlled quiet cooling fan which is only switched on when required by the load conditions and temperature (greater than 50° C).
4. A new 1U chassis so it takes up less space in a 19” rack.
5. 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 flashing red.

Important Notes:

1. 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.
2. 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 specifically requested.
3. The fan is started and run briefly every few minutes to check that it is in operation and to ensure that it doesn’t freeze through lack of use over time.