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Installation
Pin 3 and Pin 4 are hardwired together. Therefore, when a trigger is applied to pin 3 it
will also be present at pin 4. Pin 4 will be high only if a signal is applied to Pin 3.
Pin 5 - Local/Trigger GND
Pin 5 on the 10-pin I/O port provides a ground connection for the 3-5V Logic Level Trigger. Pin 5 connects to the GND
pin of an I/O port on an external controller, such as a NetLinx Central Controller.
Pin 6 - 3-5V Logic Level Trigger
The Alero can be also turned On or placed in Standby mode externally via a 3-5V Logic Level trigger signal. A 3-5V
trigger input is accessible via Pin 6 on the 10-pin I/O port.
3-5V Trigger Switch
The 3-5V Trigger Switch (FIG. 14) has two selections; High and Off.
FIG. 14
3-5V Trigger Switch
When the 3-5V Trigger Switch is set to High, the amplifier will turn on when AC mains is turned on, For example, the
3-5V Trigger switch could be set to High if the amplifier needs to be forced on without having signal sense or external
trigger signals.
Pins 7 & 8 - Thermal Overload and OC (Overcurrent) Monitor Indicators
The Thermal Overload Indicator (OUT) signal can be used to send a Thermal message from the Alero to an external
controller (such as NetLinx Central Controller), if desired.
The OC (Overcurrent) Monitor Indicator (OUT) signal can be used to send an OC message from the Alero to an external
controller if desired.
The THERMAL and OC/CLIP LEDs on the front panel (see FIG. 1 on page 1) always
light to indicate these conditions.
FIG. 15
Example - Thermal and OC Indicator Connections
12
3-5V Trigger Switch (High/Off)
A Thermal Overload Indicator signal is output on Pin 7 on the 10-pin I/O port. This pin connects to an I/O pin
on an external controller such as a NetLinx Central Controller (see FIG. 15).
An Overcurrent Monitor Indicator signal is output on Pin 8 on the 10-pin I/O port. This pin connects to an
I/O pin on an external controller such as a NetLinx Central Controller (see FIG. 15).
NetLinx Central Controller
ALR-AMP-8
Pin 7 = Thermal Overload Monitor Indicator
Pin 8 = OC (Overcurrent) Monitor Indicator
Pin 10 = GND
ALR-AMP-8 Alero 8 Zone Power Amplifier
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