AMX FG5756 Installation Manual

Overview
The AXB-VOL3 (FG5756) controls three audio volume channels. Each line-level channel,
opto-isolated from system ground, can be configured for balanced or unbalanced line
operation. It is programmable for 128 steps of audio level, audio mute, variable ramp speed
and level presets.
FIG. 1
AXB-VOL3
Specifications
AXB-VOL3 Specifications
Three Line-level Audio Control Channels:
Line operation: Balanced or unbalanced
Audio ground: Audio ground opto-isolated from system ground.
Nominal input level: -10 to +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
Front Panel Components
AxLink LED AxLink LED (green and blinks to indicate AxLink commu-
nication activity and power:
• Full-Off indicates 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-On indicates there is no AxLink control or activity,
but power is On.
Device DIP Switch An 8-position DIP switch used to set the AxLink device
number for the AXB-VOL3.
Channel LEDs Red channel LEDs 1 - 3. The LEDs individually light indi-
cating a change in channel levels.
Rear Panel Components
AxLink connector 4-pin, captive wire connector, receives power and infor-
mation via the AxLink and AxLink Central Controller.
Volume Channel connectors 6-pin, captive wire connectors that control audio level,
audio mute, variable ramp 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
AXlink VOL CHAN 3
AxLink connector
FIG. 2
AXB-VOL3 rear panel
VOL CHAN 2 VOL CHAN 1
Volume Channel
connectors
AXB-VOL3
3-Channel Volume Controller
Installation
Setting the DEVICE DIP Switch
Note: Use the DIPSwitch 2.0 application available for free download from AMX to quickly
figure out DIP Switch settings for all types of DIP Switches.
Set the device number on DEVICE DIP switch, located on the front of the AXB-VOL3. The
device can be 1 of the 255 devices in an Axcess control system. The device number must
match the device assignment in the Axcess program. Device numbers are assigned into the
following three segments:
• Cards 1 through 95
• Boxes 96 through 127
• Panels 128 through 255
Set the device number by setting the device DIP switches. The device number is the total of
all of the switches in the ON position, and take effect by cycling the power.
DEVICE DIP Switch Settings
Position 1 2 3 4
Value 1 2 4 8
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)
AxLink Connector
Install the AxLink data/power bus wiring as shown in FIG. 2.
PWR
AXP
AXM
GND
AXB-VOL3
FIG. 3
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
IN-
Jumper IN- to GND
IN+
GND
OUT- Unbalanced OUT
OUT+
FIG. 4
Volume Channels 1 - 3 Connector wiring diagrams
Installation Guide
5 6 7 8
16 32 64 128
PWR
AXP Control
system
AXM
GND
GND
IN-
IN+
GND
OUT-
OUT+
Balanced
IN
Balanced
OUT