RS232 Control

Page: 86

Model MRC88m / MRAUDIO8x8m

Section 9: Appendix

This document describes the bi-directional RS232 interface of the MRC88m using the COM PORT on the rear of the system (Fig. 3-29). This interface allows an external RS232 device to control the MRC88m via a set of ASCII text commands. It is also possible to control any IR device connected to the MRC88m system as well by triggering individual IR Commands and/or IR Macros via ASCII strings.

In EXPANDED Mode, the Primary and Secondary units RS232 ports are both active although only the Primary’s RS232 port will be bi-directional. The Secondary units RS232 port can only be used as a Control

INPUT.

EXAMPLE: Interface the Primary’s RS232 port to a Lighting/HVAC/Security system allowing the MRC88m system to control the other system or be controlled by it (bi-directional control). The Secondary units RS232 port can be connected to a touch screen controller for a Master Controller for the entire system including control of the Lighting/HVAC/Security system connected to the Primary units RS232 port.

TYPES OF COMMANDS

There are two types of information that can be sent to the MRC88m Controller: COMMANDS and QUERIES. COMMANDS are ASCII strings used to set a specific parameter in the system (i.e. Select a Source, turn a zone ON, start a DVD player etc…). QUERIES are requests for system status information and result in the MRC88m controller sending back a reply to the string being sent (i.e. seeing what zones are on, which sources are selected and volume settings etc….)

INTERFACING TO THE RS232 COMPORT

The RS232 Com Port on the rear of the MRC88m Controller, is wired as a ‘null modem’ end, meaning the Transmit and Receive line have already been interchanged for direct communication with a PC. What this means is when connecting to a standard PC’s Com Port, no Null Modem cable is necessary.

The pin out configuration for this connector is:

	COM PORT
PIN #		FUNCTION
1, 7, 8, & 9		NC
2		Tx
3		Rx
4		DSR
5		GND
6		DTR

Table 2: Rear Com Port Connector Pin Out

ASCII STRING ‘INITIATING’ AND ‘TERMINATING’ CHARACTERS

The protocol was designed to be similar to the one used in the Xantech ZPR68 so that it would be familiar. It is different from the ZPR68 in that the MRC88m has a buffered UART and is therefore able to receive a complete command/query string at one time.

MRAUDIO8X8M, MRC88M specifications

The Xantech MRC88M is a sophisticated multi-room audio system that seamlessly integrates into modern home environments, offering unparalleled control and quality of sound distribution. Designed for audiophiles and casual listeners alike, this powerful system enables users to enjoy their favorite music, podcasts, and audio from multiple sources throughout their home.

One of the standout features of the MRC88M is its 8-zone capability, allowing users to create and control up to eight independent audio zones. Each zone can customize its volume, source selection, and audio settings, providing a highly personalized audio experience. This flexibility means that different rooms can enjoy varied audio at the same time, making it ideal for entertaining guests or relaxing in private spaces.

The MRC88M employs advanced technologies to ensure high-quality sound reproduction. It uses a reliable audio matrix router that allows for the precise routing of audio signals between connected sources and zones. This ensures minimal interference and maximum clarity, making the listening experience rich and immersive. The system supports multiple source components, including CD players, streaming devices, and more, ensuring compatibility with a variety of audio formats.

Another key characteristic of the MRC88M is its user-friendly interface. Users can control the system using an intuitive remote, mobile app, or wall-mounted keypads, allowing for easy operation regardless of the user’s technical expertise. The customizable interfaces enable users to tailor the controls to meet individual preferences, enhancing the ease of use throughout the home.

Integration with smart home systems is another significant advantage of the MRC88M. It supports control via popular platforms, which allows homeowners to incorporate their audio system into broader home automation settings. This connectivity enables voice control and advanced scheduling features, making it not only a multi-room audio solution but also a vital part of a smart home ecosystem.

The MRC88M also features robust build quality and supports a wide range of speaker configurations, ensuring that it can accommodate both in-wall and traditional speakers. This versatility makes it suitable for any living space, whether in a new build or retrofitted into an existing residence.

In conclusion, the Xantech MRC88M is a top-tier multi-room audio solution that combines high-quality sound, flexible zone control, and seamless integration into smart home systems. Its advanced technology and user-friendly design make it a perfect choice for those looking to elevate their audio experience throughout their home.