5
INSTALLATION
: This power supply is for installation in APB DynaSonics sound mixing consoles and is intended for this
purpose only. Complete consoles are shipped with powers supply(s) installed.
When adding a second power supply to an existing console or replacing an existing power supply follow these
instructions.
1.
Switch off AC power. Remove the AC power cord(s). Release the four screws holding the blanking cover plate,
or the existing power supply unit. Remove the cover plate or existing power supply unit. See the diagram for
fastener locations.
2.
I n s er t th e ad d i t i o n a l /r ep l a c emen t po w e r su p p l y un i t in t o th e op en i n g an d p u s h it fi r ml y to s ea t th e
c o n n ec t i o n s . Re p l a c e th e fo u r fa s t en er s .
3. Use the power cord supplied to connect a source of AC power between 100V and 240V 50/60Hz.
4. The maximum power requirement for the largest console is approximately 500VA.
5. It is a safety requirement that the AC supply connection includes third wire protective ground connection.
6. Safe operation of the system requires flow of cooling air from the surroundings. Air intake is at the lower
front of the console. Air exhaust is at the upper rear of the console. These openings must not be covered while
the system is on. Air movement is provided by low noise internal fans.
OPERATION
1. Turn on each power supply using the rocker switch on the PS panel.
Normal operation is signaled by illumination of the four green DC voltage indicators at the top rail of the console and by
the illumination of the adjacent blue “PSU GOOD” indicator(s) and also the green “PSU GOOD” indicator on each PS unit
panel(s). The PSU Good condition is reached approx 4 seconds after initial turn-on. This delay gives the Console’s internal
circuits time to stabilize and the PSU Good signal is then used to un-mute the main outputs of the Console.
NOTE: PS450 units will only operate when electrically connected to the console circuits. When removed from the console
chassis and when power is switched on, sensing circuits in the PS unit command a shut-down of the system. In this
condition the PS GOOD indicator on the PS panel will not illuminate and there will be no DC outputs. If this occurs switch
off, replace the unit in the console and wait 30 seconds before switching on.
Normal operation of the PS 450 units requires unrestricted air flow through the unit for cooling purposes. Fans
operate at all times and circulate air within the console chassis. Ambient air reaches the PS via openings at the
front of the console. Ensure that the openings for air intake and exhaust are not obstructed.
AC POWER ON OFF
