8. MASTER CIRCUIT - BREAKER
The SST
2
amplifier uses a magnetic-trip circuit breaker to protect the amplifier. This switch should be
OFF
during
installation. When switched
OFF
all A/C power is removed from the amplifier, including standby power. The circuit
breaker is not the power switch and should be switched and left
ON
after the installation is complete. Use the front
panel push-button power switch or an external control voltage to power-up or power-down the amplifier. Should the
breaker trip, lower or remove the amplifier input signals. Switch the breaker to the ‘ON’ position. Then power the unit
up normally.
N.B.
The circuit breaker must be ‘ON’ at all times for the SST
2
amplifier to operate.
9. A/C POWER INPUT
An IEC-320 C14 power inlet provides for connection of an IEC-320 C13 equipped power cord. Before connecting the
power cord to the amplifier check that the voltage rating on the data plate or ratings label conforms with your locality.
With the circuit breaker ‘OFF’ insert the power cord into the SST
2
amplifier, then plug the other end to an appropriate
A/C power outlet.
10. EXTERNAL CONTROL VOLTAGE POWER UP ( Local / External switch)
A) To power-up the SST
2
amplifier using an external control
voltage and supply a 4v to 12v (AC or DC) control volt-
age to the ‘IN’ terminals of connector ( 5 ). Use paired
wire of 22 to 18 gage between the source device and
the SST
2
amplifier. The appropriate mating connector
(Bryston part number: 110A-11104 ) is supplied with each
amplifier.
Set the
External Turn-On
switch to “
External
”. The ampli-
fier will now power-up only when the control voltage is
present (on). Immediately following power-up, the con-
trol voltage will appear at the ’OUT’ terminals of connec-
tor for the control of other equipment. The removal of the
control voltage (0v) causes the amplifier to turn ‘off’ and
the control voltage at the ‘OUT’ terminals is interrupted.
B)
In the “
Local
” setting of the
External Turn-On
switch
(#10) the SST
2
amplifier will ignore the control voltage
and power up only by using the front panel push-button power switch. If a control voltage is present at the ‘IN’
terminals it will still be available at the ‘OUT’ terminals after the power-up sequence.
Note:
The ‘OUT’ terminals are connected to the ‘IN’ terminals once the SST
2
amplifier has powered-up.
The control current is determined by the
source
equipment. The carrying current of the ‘OUT’ relay is 2 amps.
The SST
2
control circuitry itself draws less than 2 mA from the control current when operating.
1
2
3
4
6
5
7
7
3B
SST
2
/4B
SST
2
REAR PANEL
1
4
6
3
2
8
9
10
29dB
23dB
29dB
23dB
8Ω min
REMOTE POWER TURN-ON
PLUG-IN CONNECTOR
Insert stripped ends of insulated wires revealing
approx. 1/4" of bare, stranded copper wire between
24 and 12 AWG (.5mm to 2mm dia.) into open elevator
style wire clamps & tighten with a slot screw driver.
Do not over tighten or wires may eventually come
lose. Maximum tightening torque is 4.5 lb-in (0.5Nm)
