Date printed: 24.01.12
3
D21m System
1
GENEral
1.1 Utilization for the Purpose Intended
The D21m system is intended for professional use.
It is presumed that the unit is operated only by trained personnel. Servicing
is reserved to skilled technicians.
The electrical connections may be connected only to the voltages and signals
designated in this manual.
1.2 First Steps
1.2.1 Unpacking and Inspection
Your new system is shipped in a special packing which protects the units
against mechanical shock during transit. Care should be exercised when
unpacking so that the surfaces do not get marred.
Check the condition of the equipment for signs of shipping damage. If there
should be any complaints you should immediately notify the forwarding
agent and your nearest Studer distributor.
Please retain the original packing material because it offers the best protection
in case your equipment ever needs to be transported.
1.2.2 Installation
Primary Voltage
The power supply unit is auto-ranging; it can be used for mains voltages in
a range of 100 to 240 VAC, 50 to 60 Hz.
Power Connection
The attached female IEC 320/C13 mains cable socket has to be connected
to an appropriate mains cable by a trained technician, respecting your local
regulations. Refer to the ‘Installation, Operation, and Waste Disposal’ chapter
at the beginning of this manual.
Earthing
This equipment must be earthed, due to the mains input filter network be ing
connected to the mains earth.
Some consideration must be given to the earthing arrangement of the sy stem,
at the center of which is the frame. The frame is earthed to the mains earth via
the power supply. Ground loops may occur where signal processing equip-
ment, patched to the frame, has its signal earth commoned to the equip ment
chassis.
Temperature Regulations
The unit must not be used in conditions of excessive heat or cold, near any
source of moisture, in excessively humid environments, or in positions where
it is likely to be subjected to vibration or dust. The ambient temperature range
for normal operation of the unit is +0 to +40 °C.
Under standard circumstances (open 19” frame) and an ambient tempera-
ture between 0 and +40 °C, the power dissipations listed below must not be
exceeded. Please note that these figures may change for special environments,
such as air-conditioned machine rooms, etc.
Closed
Passive, 2 Vents
Active, 1 Fan, 1 Vent
Rear
Rear
Air
Air
Air
Air
Rear
Front
Front
Front
D21m
D21m
D21m
