AMX AXB-VOL3 User Manual
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AXB-VOL3

Three-ChannelVolume Control

AXlink Bus Controllers

AMX Limited Warranty and Disclaimer

AMX Corporation warrants its products to be free of defects in material and workmanship under normal use for three (3) years from the date of purchase from AMX Corporation, with the following exceptions:

Electroluminescent and LCD Control Panels are warranted for three (3) years, except for the display and touch overlay components that are warranted for a period of one (1) year.

Disk drive mechanisms, pan/tilt heads, power supplies, MX Series products, and KC Series products are warranted for a period of one (1) year.

Unless otherwise specified, OEM and custom products are warranted for a period of one (1) year.

Software is warranted for a period of ninety (90) days.

Batteries and incandescent lamps are not covered under the warranty.

This warranty extends only to products purchased directly from AMX Corporation or an Authorized AMX Dealer.

AMX Corporation is not liable for any damages caused by its products or for the failure of its products to perform. This includes any lost profits, lost savings, incidental damages, or consequential damages. AMX Corporation is not liable for any claim made by a third party or by an AMX Dealer for a third party.

This limitation of liability applies whether damages are sought, or a claim is made, under this warranty or as a tort claim (including negligence and strict product liability), a contract claim, or any other claim. This limitation of liability cannot be waived or amended by any person. This limitation of liability will be effective even if AMX Corporation or an authorized representative of AMX Corporation has been advised of the possibility of any such damages. This limitation of liability, however, will not apply to claims for personal injury.

Some states do not allow a limitation of how long an implied warranty last. Some states do not allow the limitation or exclusion of incidental or consequential damages for consumer products. In such states, the limitation or exclusion of the Limited Warranty may not apply. This Limited Warranty gives the owner specific legal rights. The owner may also have other rights that vary from state to state. The owner is advised to consult applicable state laws for full determination of rights.

EXCEPT AS EXPRESSLY SET FORTH IN THIS WARRANTY, AMX CORPORATION MAKES NO OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. AMX CORPORATION EXPRESSLY DISCLAIMS ALL WARRANTIES NOT STATED IN THIS LIMITED WARRANTY. ANY IMPLIED WARRANTIES THAT MAY BE IMPOSED BY LAW ARE LIMITED TO THE TERMS OF THIS LIMITED WARRANTY.

 

Table of Contents

Table of Contents

 

Product Information .................................................................................................

1

Specifications ....................................................................................................................

1

Installation .................................................................................................................

3

DIP Switch Settings...........................................................................................................

3

Wiring ................................................................................................................................

3

Preparing and connecting captive wires ..................................................................................

3

Wiring guidelines..............................................................................................................

........ 3

AXlink connector ...............................................................................................................

....... 4

Volume channels 1 - 3 connectors...........................................................................................

4

Programming ............................................................................................................

5

Channel Settings Commands............................................................................................

5

Levels ................................................................................................................................

5

Send_Commands..............................................................................................................

6

AXB-VOL3Three-ChannelVolume Control

i

 

 

 

 

Table of Contents

 

ii

AXB-VOL3Three-ChannelVolume Control

 

 

 

Product Information

Product Information

The AXB-VOL3Three-ChannelVolume Control provides three audio volume control channels. Eachline-levelchannel,opto-isolatedfrom system ground, can be configured for balanced or unbalanced line operation. TheAXB-VOL3is programmable for 128 steps of audio level, audio mute, variable ramp speed and level presets. TheAXB-VOL3connects to Axcess control systems using the4-wireAXlink data/power bus; it can be used for remote or rack mount applications.

 

 

DEVICE

 

 

 

 

 

 

 

 

 

 

 

 

Front

AXlink

 

 

 

 

 

 

1

 

2

 

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Device

 

 

 

 

 

 

 

AXlink LED

 

 

 

 

 

DIP switch

 

 

 

 

 

Channel LEDs

 

 

 

 

 

 

 

 

 

 

 

 

GND

AXM AXP

PWR

OUT

OUT

GND

IN

IN

GND

OUT OUT GND IN

IN

GND

OUT

OUT

GND IN IN

GND

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Rear

 

AXlink

 

 

 

VOL CHAN 3

 

VOL CHAN 2

 

 

 

VOL CHAN 1

 

Volume Channel

connector

AXlink connector

FIG. 1 AXB-VOL3front and rear panel

Specifications

AXB-VOL3Specifications

Three line-levelaudio control channels:

Line operation:

Balanced or unbalanced

 

 

Audio ground:

Audio ground opto-isolatedfrom system ground.

 

 

Nominal input level:

-10to +4 dBm.

 

 

Max. input/output level:

+16 dBm.

 

 

Volume level resolution:

128 volume level steps (+ .5 dB per step).

 

 

Attenuation:

72 dB at full attenuation (mute).

 

 

Total Harmonic Distortion:

THD = <.008%

 

 

Frequency Response

20 Hz to 20 kHz +/- 1 dB

 

 

AXB-VOL3Three-ChannelVolume Control

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Product Information

AXB-VOL3Specifications (Cont.)

Front Panel Components:

AXlink LED

AXlink LED (green and blinks to indicate AXlink communication activity and

 

power:

 

Full-Offindicates no power is being received or the controller is not functioning

 

properly.

 

• One blink per second indicates power is active and AXlink communication is

 

functioning.

 

Full-Onindicates there is no AXlink control or activity, but power is On.

 

 

Device DIP Switch

An 8-positionDIP switch used to set the AXlink device number for the

 

AXB-VOL3.

 

 

Channel LEDs

Red channel LEDs 1 - 3. The LEDs individually light indicating a change in chan-

 

nel levels.

 

 

Rear Panel Components:

 

 

 

AXlink connector

4-pin,captive wire connector, receives power and information via the AXlink and

 

AXlink Central Controller.

 

 

Volume Channel

6-pin,captive wire connectors that control audio level, audio mute, variable ramp

connectors

speed and level presets of up to 3 devices.

 

 

Enclosure

Metal with black matte finish

 

 

Dimensions (HWD)

1.51" x 5.55" x 5.45" (3.84 cm x 14.10 cm x 13.84 cm)

 

 

Weight

1.1 lb (0.499 kg)

 

 

AXlink Power

12 VDC @ 230 mA

 

 

 

2

AXB-VOL3Three-ChannelVolume Control

 

 

 

Installation

Installation

DIP Switch Settings

Use the device DIP switch to set the AXB-VOL3AXlink device number. You can set it as one of 255 devices in an Axcess control system. Set the device number with the total of all ON (down) switches. As an example, the DIP switch below defines Device 128.

Device DIP Switch Settings

 

Position

1

2

3

4

5

6

7

8

Value

1

2

4

8

16

32

64

128 O 1 2 3 4 5 6 7 8

The device number takes effect only upon power-up.If you later change the device number, remove and reconnect the AXlink connector to enter the new device number into memory. AMX standard device numbers are assigned as follows:

Cards are 1 through 25.

Boxes are 96 through 127.

Panels are 128 through 255.

The AXB-PCCOMemulates a touch panel when set in the panel range.

Wiring

Preparing and connecting captive wires

1.Strip 0.25 inch of wire insulation off all wires.

2.Insert each wire into the appropriate opening on the connector according to the wiring diagrams and connector types described in this section.

3.Tighten the screws to secure the wires. Do not tighten the screws excessively; doing so may strip the threads and damage the connector.

Wiring guidelines

The interface requires a 12 VDC power to operate properly. The interface uses a PSN2.8 power supply. The Central Controller supplies power via the AXlink cable or external 12 VDC power supply. The maximum wiring distance between the Central Controller and interface is determined by power consumption, supplied voltage, and the wire gauge used for the cable. The table below lists wire sizes and maximum lengths allowable between the VOL3 and Central Controller. The maximum wiring lengths for using AXlink power are based on a minimum of 13.5 volts available at the Central Controller’s power supply.

Wiring Guidelines at 230 mA

Wire Size

Maximum Wiring Length

 

 

18 AWG

510.31 feet (155.54 m)

 

 

20 AWG

371.29 feet (113.17 m)

 

 

22 AWG

201.29 feet (61.35 m)

 

 

24 AWG

126.88 feet (38.67 m)

 

 

AXB-VOL3Three-ChannelVolume Control

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Installation

AXlink connector

Install the AXlink data/power bus wiring as shown in FIG. 2.

PWR

 

 

 

 

 

 

 

 

 

 

 

 

PWR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AXP

 

 

 

 

 

 

 

 

 

 

 

 

AXP Control

AXM

 

 

 

 

 

 

 

 

 

 

 

 

AXM

system

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GND

 

 

 

 

 

 

 

 

 

 

 

 

GND

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AXB-VOL3

 

FIG. 2

 

AXlink data/power connections

 

Volume channels 1 - 3 connectors

Volume channels 1 - 3 can be wired for unbalanced or balanced line operation, as shown in FIG. 3.

Optional 600 ohm resistor can be added for impedance matching, if required

GND

Unbalanced IN

GND

Balanced

IN-

IN-

Jumper INto GND

IN

 

 

IN+

 

IN+

 

GND

 

GND

Balanced

OUT-

Unbalanced OUT

OUT-

OUT

OUT+

 

OUT+

 

 

FIG. 3

Volume Channels 1 - 3 Connector wiring diagrams

 

 

 

4

AXB-VOL3Three-ChannelVolume Control

 

 

 

Programming

Programming

The following sections list Axcess programming commands used with the AXB-VOL3.

Channel Settings Commands

Use the AXB-VOL3channel settings listed for ramp up, ramp down and mute operations..

AXB-VOL3Channel Setting Commands

Channel

Description

Channel

Description

 

 

 

 

1

Ramps channels 1 and 2 up.

7

Ramps channel 2 up.

 

 

 

 

2

Ramps channels 1 and 2 down.

8

Ramps channel 2 down.

 

 

 

 

3

Mutes channels 1 and 2.

9

Mutes channel 2.

 

 

 

 

4

Ramps channel 1 up.

10

Ramps channel 3 up.

 

 

 

 

5

Ramps channel 1 down.

11

Ramps channel 3 down.

 

 

 

 

6

Mutes channel 1.

12

Mutes channel 3.

 

 

 

 

Ramping a volume channel while the mute channel is on will NOT automatically turn off the mute channel (will not restore) but the ramping will still occur and the volume change will be noticed when the mute channel is turned off. For setting ramp rates and presets, see SEND_COMMAND programming instructions below. For reading current volume levels and displaying bargraphs see CREATE_LEVEL and SEND_LEVEL programming instructions. Volume channels 1 through 3 use levels 1 to 3 respectively.

When controlling levels, such as with an active bargraph, there is no LED indication of volume changes.

Levels

1 = Output #1

2 = Output #2

3 = Output #3

AXB-VOL3Three-ChannelVolume Control

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Programming

Send_Commands

System Send_Commands are stored in the Axcess Control System.

AXB-VOL3Send_Commands

PLT

Ramps specified channel(s) from current level to a specified preset level or percentage at the

 

current rate or optionally in a specified amount of time.

 

Syntax:

 

SEND_COMMAND VOL, ’P<output channel 0-3>L<level0-255|0-100%>[T<Time

 

0-255in tenth second increments>]’

 

Variables:

 

Output Channel = Channel numbers 1, 2 or 3. Output channel 0 = both channels 1 and 2.

 

Level = Level number (0-255)or percentage(0-100percent). Level 0 is lowest volume (same

 

as mute) and 255 or 100% is maximum volume.

 

Time = Optional ramp time (0-255)in tenths of a second.

 

Example 1:

 

SEND_COMMAND VOL,'P0L50%'

 

Ramps both channels to 50% mid level volume at the current ramp rate.

 

Example 2:

 

SEND_COMMAND VOL,'P1L255T20'

 

Ramps channel 1 to highest level volume in 2 seconds.

 

 

PR

Sets the ramp rate of the specified channel(s) where the time is the time to ramp the full range

 

both down to up and up to down or optionally just down to up or just up to down.

 

Syntax:

 

SEND_COMMAND VOL, 'P<output channel 0-3>R<ramprate0-255in tenth

 

seconds>[U|D]'

 

Variables:

 

Output Channel = Channel numbers 1, 2 or 3. Output channel 0 = both channels 1 and 2.

 

Ramp Rate = Sets ramp rate (1-255)for channel commands in tenth second increments.

 

U = Optional character sets rate for ramp up.

 

D = Optional character sets rate for ramp down.

 

Example 1:

 

SEND_COMMAND VOL, 'P0R50'

 

Sets ramp rate of channels 1 and 2 to 5 seconds full range from down to up and up to down.

 

Example 2:

 

SEND_COMMAND VOL, 'P3R50D'

 

Sets ramp rate of channel 3 to 5 seconds full range from up to down only.

 

 

 

6

AXB-VOL3Three-ChannelVolume Control