Information subject to change
97-2105006_4-2-15
2105 OPERATOR’S MANUAL –
SECTION 6
28
6.2.1
Remote Amplifier Status and
Reset
The SIM Interlock I/O Connector can be used to
create a circuit to monitor remotely one or more
amplifier conditions, including Run status, Over-
temperature, Overload and Overvoltage. The cir
-
cuit can also be constructed to allow remote reset
of the amplifier when it is forced to Standby due to
Over-temperature or Overload conditions.
Use a male, 25-pin D-Sub connector and high-
quality wire to build the circuit.
Figure 6.10
sche-
matic details the circuit and components required
for all status and reset functions.
Remote Signal of Over Temperature
Condition
Purpose:
LED, when lit, signals Over Temperature
condition.
Method:
Use a 6mA series resistor of 4.02 Kohm
for LED or OPTO, tie OverTemp Out (PIN 11) to
-24V source (PIN 13).
Signal Type:
DC
Level when Asserted:
–24V
Figure 6.10 – Remote Status and Reset Schematic
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 Overtemp state, transistor Q37 turns on and
sources chassis ground as an output. Do not ex
-
ceed 20 milliamps.
An Overtemp condition will force the amp to
Standby. The amplifier will automatically move to
Run when temperature cools to operating levels.
Remote Signal of Run Condition
Purpose:
LED, when lit, signals Run state.
Method:
Use a 6mA series resistor of 4.02K-ohm
for LED or OPTO, tie Run (PIN 12) to –24V source
(PIN 13).
Signal Type:
DC
Level when Asserted:
–24V
Level when Deasserted:
0V
Remote Signal of Overload Condition
Purpose:
LED, when lit, signals Overload condition.
Method:
Use a 6mA series resistor of 4.02K-ohm
for LED or OPTO, tie OverLoad Out (PIN 23) to
–24V source (PIN 13).
Signal Type:
DC
Level when Asserted:
–24V
