Sonifex S2 - Rear Panel; Fig 3-6: S2-PSUS Rear Panel

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S2 User Handbook

Resetting the S2-PSU States

The S2-PSUS detects when a power supply has been removed or unplugged. If this occurs,

the S2-PSUS assumes the power supply has been serviced and all failure statistics are

refreshed. If a rail has failed permanently, removing or unplugging the supply will allow the

rail to be fully tested again, once reinstated. Removing both power supplies will reset the

S2-PSUS, indicated by the alternating front led sequence.

Usage Advice

The unit has been designed to give the user as little down time as possible. If an S2-PSU

rail reaches an unrecoverable state, please remove and service it. If an extreme fault occurs

(total loss of power) on the +VD rail, the switch over can cause a reset of digital modules

which will result in a small audio glitch.

Rear Panel

Fig 3-6: S2-PSUS Rear Panel.

There are alarm outputs on the rear of the unit, created using opto-isolator switches.

These alarm outputs mimic those on the front panel and there is also an alarm relay which

operates as a warning for total unit failure. This will come on if the both power supplies

have failed.

Power Input Connectors

Two trailing leads 0.5m in length are used to connect 2 x S2-PSU units to the power switcher.

Power Output Connector

This 9 pin D type connector (see Fig 2-9) is used to route power to the Mixer from either the

master or slave power supply. It has the same connections as the output from the PSU (see

above).

Alarm & Status Connector

This 25 pin D type socket provides alarm and status output for the power switcher and has

the following connections;

Pin 1: 0V.

Pin 2: Opto isolated +VE master alarm NPN collector.

Pin 3: Opto isolated +VE master alarm NPN emitter.

Pin 4: Opto isolated +VE slave alarm NPN collector.

POWER SUPPLY