2
Communication
The HLS-71 Intelligent Audio Switcher has the default device ID 7. It can send and receive serial commands
via RS-485 at 57600 Baud, 8-N-1, and half-duplex; and via RS-232 at 115200 Baud, 8-N-1, and full-duplex.
Both configuration ports utilize a modular RJ-45 jack with the following pinouts:
RS-485 Pinout:
RS-232 Pinout:
Pin # Function
Pin # Function
Pin # Function
Pin # Function
P1
Orange White - Ground
P5
Blue White - Switched
Power Bus (12V Dev Only)
P1
Orange White -
Ground
P5
P2
Orange - Ground
P6
Green - Data B Negative
P2
Orange - Ground P6
Green - RX or TX
P3
Green White - Data A
Positive
P7
Brown White - Ground
P3
Green White -
TX or RX
P7
Brown White -
Ground
P4
Blue - Switched Power Bus
(12V Devices Only)
P8
Brown - Ground
P4
P8
Brown - Ground
RS-232 Commands
Commands
Command Format
Response
REBOOT
[DEV=7;REBOOT]
ANALOG ON
[DEV=7;ANALOG=#;ON]
ANALOG OFF
[DEV=7;ANALOG=#;OFF]
RESET DEFAULTS
[DEV=7;RESET;DEFAULT]
GET CURRENT
[DEV=7;CURRENT=1;NOW?]
(DEV=7;CURRENT=1;NOW=$)
GET MAX CURRENT
[DEV=7;CURRENT=1;MAX?]
(DEV=7;CURRENT=1;MAX=$)
GET MIN CURRENT
[DEV=7;CURRENT=1;MIN?]
(DEV=7;CURRENT=1;MIN=$)
RESET CURRENT
[DEV=7;CURRENT=1;RESET]
GET VOLTAGE
[DEV=7;VOLTAGE=1;NOW?]
(DEV=7;VOLTAGE=1;NOW=$)
GET MAX VOLTAGE
[DEV=7;VOLTAGE=1;MAX?]
(DEV=7;VOLTAGE=1;MAX=$)
GET MIN VOLTAGE
[DEV=7;VOLTAGE=1;MIN?]
(DEV=7;VOLTAGE=1;MIN=$)
RESET VOLTAGE
[DEV=7;VOLTAGE=1;RESET]
APP VERSION
[DEV=7;APP;VERSION?]
(DEV=7;APP;VERSION=$)
BOOTLOADER VER
[DEV=7;BOOT;VERSION?]
(DEV=7;BOOT;VERSION=$)
Quick Start Instructions
1. Connect the receiver harness from “Speaker Level Input” on HLS device to AVR outputs.
2. Connect the speaker harness from the “Left/Right/Center Speaker Output A/B” connections
on the HLS device to the appropriate speakers.
3. Open a serial terminal - 115200 8-N-1. Toggle Null/Straight switch if needed to correct signal polarity.
4. Send analog switch commands to device 7 (default) to enable or disable a position.
Troubleshooting
No RS-232 Communication:
• Ensure connections are fully seated.
• Ensure devices are using the correct protocol settings.
• Ensure the Null/Straight selector is set correctly.
No Ethernet Connectivity
(IP version only)
• Ensure connections are fully seated.
• Ensure the end device is powered on with Ethernet enabled.
• Power cycle all devices to clear out previous TCP connections.
