RS-232 Port Functions

Section 1: Introduction- Detailed Description of Functions

RS-232 Port- The RS-232 (serial) port is used to communicate with the CM16a for Ethernet address setup and other diagnostic purposes. Most users will never have a need to access the RS232 port, but for customized networks and for troubleshooting system problems, it may be necessary.

For the RS-232 port utilities, see the Operation section, “Serial Port I/O Interface” which out- lines the proper connection and communication settings required to communicate with the CM16a via the serial (RS232) port.

If the CM16a is connected to an Ethernet network where the factory-provided IP address information is not acceptable, the IP configuration may be changed using the RS-232 port. This involves connecting a com- puter with a properly configured serial port to the CM16a using a null-modem type cable (such as a “Laplink” cable) and running a dumb-terminal program (HyperTerminal is the Microsoft® Windows- supplied program). DO NOT CHANGE THE FACTORY SETTINGS UNLESS YOU ARE CERTAIN OF WHAT YOU ARE DO- ING! If addressing is configured incorrectly, the CM16a may not respond to network control.

Note- The factory-programmed IP address is printed on a label affixed to the front panel of the CM16a. Record this IP address in a safe place in case the label becomes lost.

CONTACT CLOSURE I/O FUNCTIONS

RLY OUT- This is a 3-pin terminal block connector used for remotely controlling an electrical device in an on/off manner (such as a cooling fan, an audible alarm, a light, etc.). An internal SPDT (single-pole, double throw) relay is controlled by software command. Its contacts are accessible at the rear panel RLY OUT connector and are labeled:

NC (normally closed)

NO (normally open)

C(common)

RLY/TRG IN- Detects the closure (or opening) of a switch connected to the RLY/TRIG IN terminals on the rear panel. Also accepts CMOS and TTL logic-level inputs. An example is the detection of a limit-switch that indicates an open door on an equipment cabinet.

This input may also be configured to activate (recall) certain presets without the need for a computer. Setup for this feature is possible using the Serial Port I/O or Telnet sessions outlined on pages 27 - 30 (ref. menu item #10).

CM16a specifications

The QSC Audio CM16a is a versatile and powerful amplifier designed to meet the demands of professional audio applications. Known for its reliability and performance, the CM16a is ideal for both live sound and installation scenarios, offering a perfect blend of advanced technology and user-friendly features.

One of the standout features of the CM16a is its Class D amplifier architecture. This technology ensures not only high efficiency but also a lightweight design, making it easier to transport and install in various settings. The amplifier delivers an impressive output power of 1600 watts at 4 ohms, providing ample headroom for demanding audio applications. The CM16a is capable of handling multiple speaker configurations, making it a flexible choice for various setups.

Another key characteristic of the QSC CM16a is its advanced thermal management system. This built-in feature ensures the amplifier operates within safe temperature limits, enhancing reliability and extending the lifespan of the unit. The CM16a also includes an intelligent protection circuit that safeguards the amplifier from overload and short circuits, allowing users to operate it confidently even during intense performances.

The CM16a comes equipped with multiple inputs and outputs, including XLR and TRS connectors, enabling seamless integration with a range of audio sources and systems. This versatility allows for easy connection to mixers, microphones, and instruments, making it suitable for diverse applications from concerts to corporate events.

In addition to its robust performance, the QSC CM16a features an intuitive front panel design with LED indicators for quick monitoring of system status and performance. Users can easily adjust levels and settings, ensuring optimal audio quality for any given situation.

The amplifier is also designed with efficiency in mind, incorporating Power Factor Correction (PFC) technology. This enhances power usage, reducing operational costs while minimizing environmental impact.

In conclusion, the QSC Audio CM16a stands out as a premier choice for audio professionals seeking a reliable, high-performance amplifier that can deliver exceptional sound quality. With its Class D technology, advanced protection features, versatile connectivity, and user-friendly design, the CM16a is a worthy investment for any audio application. Whether for live sound reinforcement or permanent installations, the CM16a promises to meet the needs of even the most demanding audio environments.