Meridian Audio 421 User Manual

RS232 Commands

Link settings: 9600 bits/second, 8N1, flow control off.

Basic commands

%In Input selection, n=1..4. e.g. %I2 selects input 2.
CS Read current status, returns the currently

selected input.

%? Help. Returns a list of supported commands.

Programming commands
No extra store is required for write commands.

%Pn Write power up input, n=1..4. e.g. %P3 selects

input 3 on power up.

%Wn Read power up input, returns the power up

input.
%Smmn Write source input,
mm=01...12 corresponding to Meridian sources

CD...Game on the MSR+,
n=1...4 the input to be used when this source is

selected on the Comms.
%Fmm Read source input, reads the input used when

this source is selected on the Comms.
mm=01...12 corresponding to Meridian sources

CD...Game on the MSR+.

Meridian Audio Limited

Latham Road,
Huntingdon, Cambridgeshire PE29 6YE
United Kingdom
Tel [phone]
Fax [phone]
Web: www.meridian-audio.com

Meridian America Inc

8055 Troon Circle, Suite C
Austell, Atlanta GA 30168-7849
USA
Tel [phone]
Fax [phone]
Email: [e-mail]

SAFETY INFORMATION FOR
HDMAX121/421; HDMAX421
RS232 CONTROL CODES

Important safety instructions

• Read the instructions.

• Keep these instructions.

• Follow all instructions.

• Do not use this apparatus near water.

• Clean only with a dry cloth.

• Install only in accordance with the manufacturer’s
instructions.

• Refer all servicing to approved service personnel.

WARNING: TO REDUCE THE RISK OF FIRE
OR ELECTRIC SHOCK, DO NOT EXPOSE THIS
APPARATUS TO RAIN OR MOISTURE

Safety warnings

• Do not expose the product to dripping or splashing.

• Do not place any object filled with liquid, such as a
vase, on the product.

• Do not place naked flame sources, such as lighted
candles, on the product.

To avoid interference, do not position the product:

• Near strong magnetic radiation, such as near a power
amplifier.

• Near to a television, or where connecting cables may
be subject to or cause interference.

To avoid overheating:

• Leave at least 10cm around the equipment to ensure
sufficient ventilation.

Do not position the product:

• In direct sunlight.

• Near heat sources, such as a radiator.

• Directly on top of heat producing equipment, such as
a power amplifier.

Radio interference

FCC Warning: This equipment generates and can
radiate radio frequency energy and if not installed and
used correctly in accordance with our instructions may
cause interference to radio communications or radio and
television reception. It has been type-tested and complies
with the limits set out in Subpart J, Part 15 of FCC rules
for a Class B computing device. These limits are intended
to provide reasonable protection against such
interference in home installations.

EEC: This product has been designed and type-tested to
comply with the limits set out in EN55013 and EN55020.

Mounting Instructions

The HDMAX 421 may be mounted with the mounting
plates provided. Remove the rubber feet to expose M3
threaded inserts and fit the mounting plates with the
bolts provided, using a #1 Pozidriv screwdriver.

hdmx-si • v1.2 • RE20050926