Information subject to change
97-7224006_3-31-15
7224 OPERATOR’S MANUAL – SECTION 2
8
2.4 Connecting the Load
Before connecting the amplifier, make sure the AC
power cord is unplugged.
This section describes output wiring to the load
when using the default amplifier configuration:
Single (or Master) amplifier operated in Controlled
Voltage mode. The 7224 amplifier also can be
field-adjusted for operation in Controlled Current
mode or for operation as a Slave amplifier in a
multi-amplifier system. These alternate configu
-
rations may require special output wiring and/or
additional components.
If your application requires Controlled Current and/
or Slave operation, change the default settings on
the main board before connecting the amplifier.
(See the
Advanced Configuration
section for
more information.)
Connection to the output of the amplifier is to a
3-position terminal strip with #8 screws. Wires
terminated with #8 ring terminals, tinned wires
up to 10GA in size, or bus bars with 0.18 in. (4.6
mm) holes are recommended when connecting to
the output terminals. Connect the load across the
terminals marked “OUTPUT” (positive) and “COM”
(negative/ground). The third terminal, “CHAS
-
SIS GROUND” can be connected to an external
ground point such as the rack chassis. See
Figure
2.2.
Always use the appropriate wire size and insula
-
tion for the maximum current and voltage expected
at the output. Never connect the output of the
amplifier to any other model amplifier, power sup
-
ply, signal source, or other inappropriate load; fire
can result.
NOTE: The 7224 amplifier comes with a factory-in
-
stalled 2.7-ohm, 2W, 5%, metal-oxide resistor con
-
necting the terminals marked “COM and “CHAS
-
SIS GROUND” (see
Figure 2.3
). This resistor
should NOT be removed.
WARNING: Removing
this resistor can cause dangerous output and/
or damage to the load.
Figure 2.1 – 7224 Back Panel
Figure 2.2 – Connecting the Load
ELECTRIC SHOCK HAZARD.
Output potentials can be lethal. Make
connections only with AC Power OFF
and input signals removed.
WARNING
Figure 2.3 – Closeup of the Output Terminals
