CT Power Amplifiers
10 Auxiliary Port
10.1 Deep Sleep
In deep sleep mode, the amp consumes less than 1 watt of power. It is activated via the AUX port with a ground closure.
To bring the amplifier out of deep sleep, remove the ground closure via the AUX port.
10.2 Amp Status
The Amplifier Status is designed to work with life safety or supervisory monitoring and control systems, where notification of an amplifier fault is necessary. The Amplifier Status is producing a signal (Heartbeat or tone) when the amplifier is operating within standard working parameters. If the amplifier enters a fault or thermal condition, the Amplifier Status signal will terminate. This feature in the ComTech amplifier is always on. The Amplifier Status is located on the Auxiliary Port, opposite the DEEP SLEEP function. The configuration of the Amp Status signal is possible through DIP Switch #3:
•ON – the microcontroller will send a 1 Hz pulse to the “AMP STATUS” AUX port line
•OFF – the microcontroller will send a logic
high level to the “AMP STATUS” AUX port line
The voltage output of the AuxPort is 5VDC at 50 milliamps. This TTL or similar signal can then be connected to an interface to indicate the status to a supervisory control system.
Amp status can be used in a variety of life safety applications, such as EN54, IEC60849 among others.
11 Input Routing
This amplifier can route a single channel to the next numbered channel.
In CT 475 and CT 4150, DIP switches
When a DIP switch is set to “on” for a specific channel, it sends the signal to its own output AND becomes the input for the next numbered channel, overriding the wired input for that channel.
Figure 11.1 | Figure 11.3 |
Channel 1 intput sent to all channel | Channel 1 input sent to channels 1, 2, and 3 |
outputs, overriding channel inputs for | Channel 4 input sent to channels 4, 5, and 6 |
channels 2,3, and 4 | Channel 7 input sent to channels 7 and 8 |
Figure 11.2
Four input signals sent to four outputs
Operation Manual | page 13 |
