MC850 Operations Manual Rev F
Page 8
Table of Contents
Top
6
Rear Panel
1.
AC line input
– Connect the included IEC power cable.
2.
Network audio connectors
– Connect one end of a Cat 5e or Cat 6 cable to primary port, and
the other to the 100/1000BaseT switch carrying audio traffic. By default, the two port jack is
configured as a switch, so the other (secondary) jack may be used to “daisy-chain” other
network components. These ports can be configured in Dante Controller as redundant audio
ports, in which case each port should be connected to a switch on a separate audio network.
3.
Control and status connector
– Connect one end of a Cat5e or Cat 6 cable to this port, and the
other to an Ethernet switch for network control and status. This port can be on the same
network as the audio traffic or on a separate network. Further, if a redundant audio network
is not required, and if the control port can be on the same subnet mask as the audio data, the
two-port audio Ethernet jacks can be configured (via Dante Controller) in switch mode and the
control port can be daisy-chained from the unused audio port. The PC running Stewart Audio’s
MC850 Control and Status application must be on the same network as the control port.
4.
Fault indicator
– This red LED illuminates in the presence of a fault. A steady LED indicates that
the internal temperature of the device is reaching an unsafe level. A flashing LED indicates that
the amplifier has reached an unsafe internal temperature level and has shut down for
protection. The LED will remain flashing until a safe operating temperature is attained. At that
time, the amplifier will automatically restart. If this condition persists, reassess airflow and
cooling conditions.
5.
Power LED
– This green LED illuminates whenever AC power is applied. A steady LED indicates
normal operation, while a flashing LED indicates that the amplifier has reached an unsafe
internal temperature and is in a cool down phase.
6.
Signal LEDs
– The green LED associated with that channel will illuminate when the input signal
level for that channel is greater than -60dBV. There is an approximately 0.5 second hysteresis
at the -60dBV level to prevent excessive flashing.
7.
70/100V Switch
(Constant Voltage and Mixed models only)
– Select the desired output
voltage (70.7V or 100V) by sliding the switch to the appropriate position in order to meet the
requirements of the country of sale.
Note that a change in the desired output voltage will only
take effect after the amplifier is power cycled. This is intended as a safety feature.
8.
RS-232 connector
– Connect to a standard RS-232 controller using the 3.5mm Euro-style
terminal blocks provided. For RS-232 codes, see
Section 6.1.3
.
9.
Contact Mute
–
Dry contact closure to mute all amplifier outputs.
10.
Speaker outputs
– Connect loudspeakers using the 5mm Euro-style terminal blocks provided.
Use 4Ω or 8Ω speakers for low impedance models (
–LZ) and the two low impedance outputs (7
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