Operation Manual

10 Chapter 3: Rear Panel
DL371 Audio System Engine
Operator Manual
Mains input
WARNING!
HIGH INRUSH CURRENT.
Caution:
You must ensure that a minimum of two PSU modules are powering
the unit for correct operation (see “Switching the PRO6 Control
Centre on/off” on page 52).
The mains input section comprises three modular sets of mains input and fan
assemblies — known as power supply unit (PSU) modules — and a DC isolator switch.
The modules are N+1 redundant and a minimum of two must be used to power the
unit. Each PSU module comprises a single chassis that slides in and out of the unit to
facilitate easy replacement.
1 Fan outlet vent.
2 Handle for mains input and fan assembly
removal.
3 Mains IEC socket.
4 Power on/off indicator LED. This has the
same functionality as the power supply LEDs in
the psu section of the front panel (see “psu
panel” on page 6).
5 D.C. POWER ON switch, switches the
power to the unit on/off.
6 Mains IEC connector (locking type). This
connector has a catch on the side that holds
the connector in place when it is inserted in
the mains socket. The catch has be pressed to
release it before the mains IEC connector can
be removed from the socket.
1
1
3
4
2
5
6
Note: This diagram does not show
the bar across the D.C. POWER
ON switch, which helps to prevent
accidental operation of the switch,
and the securing brackets to the
left of each PSU module.