97-2105006_4-2-15
Information subject to change
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2105 OPERATOR’S MANUAL –
SECTION 6
Figure 6.11 – Remote Run/Standby Monitor
Level when Deasserted:
0V
Note:
When amp is normal, this pin is pulled to
–24V through a 47.5K-ohm resistor; when amp
is in Overload state, transistor Q36 turns on and
sources chassis ground as an output. Do not ex
-
ceed 20 milliamps.
An Overload condition will not place the amplifier
in Standby when operating with the factory de
-
fault settings. In order to clear the fault condition,
reduce the input levels until the Fault LED turns
off. However, if the Standby Mode on Overload
option is set, an Overload condition will force amp
to Standby. To return the amplifier to Run mode,
reduce the input signal level, then trigger a Reset
command using the front-panel Reset button or a
remote amplifier Reset command.
Remote Signal of OverVoltage Condition
Purpose:
LED, when lit, signals Overvoltage condition.
Method:
Use a 6mA series resistor of 4.02K-ohm
for LED or OPTO, tie OverVoltage Out (PIN 24) to
–24V source (PIN 13).
Signal Type:
DC
Level when Asserted:
–24V
Level when Deasserted:
0V
Note:
When amp is normal, this pin is pulled to
–24V through a 47.5K-ohm resistor; when amp
is in Overvoltage state, transistor Q29 turns on
and sources chassis ground as an output. Do not
exceed 20 milliamps.
Reset from Standby
Purpose:
Switch, when thrown, returns amp to
Run condition after Over-temperature or Overload
conditions.
Method:
Use a dry-contact switch, voltage regula
-
tor (MC7915), and two 0.01/50V capacitors; wire
the circuit as shown (above). Assert 15V for at
least 100 ms to clear the error condition.
Signal Type:
DC
Level when Asserted:
–15V
Level when Deasserted:
0V
Note:
Tie to PIN 13 (–24V dc) and create a –15V
dc source; <2mA required for reset. Connect the
–15V dc source to PIN 25 (Reset) through a 1K
buffer resistor to reset.
6.2.2 Remote Run/Standby Status
Monitor
Using the SIM-BNC Interlock connector located on
the back panel of the amplifier, you can remotely
monitor the Run/Standby status of the amplifier.
Remote Run/Standby Status
Purpose:
Use a voltage meter to monitor the sta
-
tus of the amplifier to determine if the amplifier is in
a “Run” or “Standby” state.
Method:
Connect a voltage meter to monitor the
circuit voltage. Connect across PIN 4 (Interlock)
and PIN 10 (Sampled Common).
When the voltage meter reads greater than 10V,
the amplifier is in the Run state; when the meter
reads less than 10V, the amplifier is in the Standby
state. See
Figure 6.11.
Signal Type:
DC
Level when Asserted:
>10 V
Level when Deasserted:
<10 V
IMPORTANT:
This circuit has a 100K pull-up resis
-
tor. Make sure the monitor function has sufficient
impedance to avoid accidentally influencing status
