97-7796264_09-04-2020
Information subject to change
17
7548/7794/7796/7796HC OPERATOR’S MANUAL – SECTION 3
One or More Amps in System Main Status
Indicators of
Other Amps
in System
State of Operation
Action Needed to Clear
Fault Condition and Re-
turn to Run Mode
Main Status
Indicators
Fault Status
Reported on
LCD Display
Run
Ready
Standby
Stop
WARNING!
OVERVOLTAGE
Run
Ready
Standby
Stop
Overvoltage status:
This
indicates that the AC mains
voltage is more than +10% of
nominal. All amplifiers in the
system will be forced to Standby
when an Overvoltage condition
occurs. When the Overvoltage
condition is cleared, the system
will automatically return to Run
mode.
To clear an Overvoltage fault
condition, the AC mains must
be brought down to the nomi
-
nal value. If the system does
not return to Run mode when
the Overvoltage condition has
cleared, one or more amplifiers
may require servicing. Please
see the
Troubleshooting
sec-
tion for more information.
3.3
Back-Panel Controls
and Connectors
This section provides an overview of Back-
Panel controls and connectors found on the
7548/7794/7796/7796HC amplifier. Please refer to
Figure 3.7
for visual locations.
AC Power Connector -
This is a NEMA style twist
lock, 4 pin (208V) or 5-pin (400V), three-phase
connector. See
Section 2.6, “Connecting the AC
Supply,”
for terminal connections.
Low-Voltage Fuse -
This is a 1A slow blow type
600-volt rated fuse.
AC Mains Switch/Circuit Breaker -
This dual
function power switch and circuit breaker opens all
legs of the AC mains. The rating is 20A (7548) or
30A (7794/7796/7796HC) for 208 volts.
Figure 3.7 – Back Panel Controls and Connectors
Output Terminal Block -
Connect output lines
from the load to this 4-terminal block. It accepts up
to #4 AWG wire. Drive the load in the Controlled
Current mode using the OUTPUT terminal and the
SAMPLED COMMON terminal only.
BNC Input Connector -
This input option provides
a standard unbalanced input.
Input Selector Switch -
This switch selects which
input connector is active, the BNC or Weco.
Weco Input Connector -
This input option pro-
vides a balanced input.
Interlock Connector -
This 25-pin, D-sub connec-
tor is used for interlocking and combining functions
in a multi-amp system. It can also be used for re-
mote control and monitoring applications (see the
Applications
section for more information).
Summary of Contents for 7548
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