DL-AS31-2H1V
Installation Guide
INPUTS OUTPUT
HDMI 1 HDMI 2 VGA AUDIO AUDIO CONTACT DISPLAYHDMI
DL-AS31-2H1V
3x1 Auto-Switcher
FW HDMI 1 HDMI 2 VGA AUTO CEC
GND
HDMI 2AUTO
HDMI 1 VGA
GND OFF ON TX RX
RS232 5V DC
AUTO/MAN
Safety Precautions
To insure the best from the product, please read all instructions carefully before using
the device. Save this manual for further reference.
• Unpack the equipment carefully and save the original box and packing material for
possible future shipment.
• Follow basic safety precautions to reduce the risk of fire, electrical shock and injury
to persons.
• Do not dismantle the housing or modify the module. It may result in electrical
shock or burn.
• Using supplies or parts not meeting the products’ specifications may cause
damage, deterioration or malfunction.
• Refer all servicing to qualified service personnel.
• To prevent fire or shock hazard, do not expose the unit to rain, moisture or install
this product near water.
• Do not put any heavy items on the extension cable in case of extrusion.
• Do not remove the housing of the device as opening or removing housing may
expose you to dangerous voltage or other hazards.
• Install the device in a place with good ventilation to avoid damage caused by
overheating.
• Keep the module away from liquids.
• Spillage into the housing may result in fire, electrical shock, or equipment damage.
If an object or liquid falls or spills on to the housing, unplug the module immediately.
• Do not use liquid or aerosol cleaners to clean this unit. Always unplug the power
to the device before cleaning.
• Unplug the power cord when left unused for a long period of time.
• Information on disposal for scrapped devices: do not burn or mix with general
household waste. Please treat them as normal electrical waste and recycle the devices
properly.
The DL-AS31-2H1V is a multiformat auto-switcher with two HDMI
inputs, one VGA with analog audio input, one HDMI output, and one
balanced analog audio output. This auto-switcher supports HDMI
video resolutions up to 4Kx2K at 30 Hz and multichannel audio and
VGA video resolutions up to 1920x1200 at 60 Hz. In addition to passing
EDID information from the display, there are multiple built-in EDID
settings to simplify an installation. The DL-AS31-2H1V will de-embed
the digital audio from the HDMI output signal, and output it via the
balanced analog audio output port.
When in auto-switch mode, the DL-AS31-2H1V will switch to a signal
input as soon as a new source is connected. When the active source
is removed, the switcher will select the first source on the lowest
numbered input. The DL-AS31-2H1V may also be controlled via RS232
commands or by contact closures on the rear of the switcher.
Front Panel
2 3 4 5 6 7
1
FW HDMI 1 HDMI 2 VGA AUTO CEC
1. Firmware Update Port
2. Power LED
3. HDMI 1 Activity LED
4. HDMI 2 Activity LED
5. VGA Activity LED
6. Auto-Switching Mode LED
7. CEC Mode Switch
Rear Panel
A B C D E F G H I
AUTO/MAN
INPUTS OUTPUT
HDMI 1 HDMI 2 VGA AUDIO AUDIO CONTACT DISPLAYHDMI
A. HDMI 1 Input
B. HDMI 2 Input
C. VGA Input with Analog Audio
D. HDMI Output
E. Balanced Analog Audio Output
F. Source Select Contact Closures
G. Display CEC On/Off Contact Closures
H. RS232 Control Port
I. 5V DC Input
Included Accessories
• Installation guide
• Power supply with AC adapters
• RS232 cable
• 5-pin terminal blocks (2 ea)
HDMI 2AUTO
GND
HDMI 1 VGA
GND OFF ON TX RX
RS232 5V DC
• 3-pin terminal blocks (2 ea)
• rubber feet
• mounting “L” brackets (2 ea)
• mounting screws (4 ea)
Installation Instructions
1. Verify all components included with the switcher are present before
installation.
2. If the switcher will be permanently mounted to a surface, attach
the included mounting brackets with the supplied screws.
3. If the switcher will be sitting on a shelf, attach the included rubber
feet to the bottom of the unit.
4. Turn off power and disconnect the audio/video equipment by
following the manufacturer’s instructions.
5. If the switcher needs to use a preset EDID instead of the EDID of
the connected display, send the appropriate RS232 EDID command
to the DL-AS31.
6. Connect HDMI signal cables between the HDMI sources and the
HDMI 1 and HDMI 2 Input ports.
7. Connect a VGA signal cable between the VGA source and the VGA
Input port.
8. Connect an audio signal cable between the audio source and the
Audio Input port.
9. Connect an HDMI cable between the display and the HDMI Output
port.
10. Connect an analog audio cable between an audio amplifier and the
Audio Output port.
11. Connect an RS232 cable between the control system and the RS232
port. The distance between PC and the switcher should be within
100m.
12. If the switcher will be controlled via contact closure, connect the
controller to the CONTACT and DISPLAY ports.
13. Connect the included power supply to the switcher.
14. Power on attached audio/video devices.
Source Select Contact Closure Wiring
With AUTO and GND shorted, the DL-AS31 will automatically switch to the next active
input. Momentary contact closure connections will manually switch the source input.
Automatic Switching: Manual Switching: Automatic Switching
with Manual Override
HDMI 2AUTO
HDMI 1 VGA
GND
HDMI 2AUTO
HDMI 1 VGA
GND
HDMI 2AUTO
HDMI 1 VGA
GND
Input Selection
Automatic Switching:
To enable automatic switching, place a jumper between the Gnd and Auto connections
on the Source Select Contact Closures. When in auto-switch mode, the DL-AS31 will
switch according to the following rules:
New Input: Upon detecting a new input, the switcher will automatically select the new
input.
Reboot: Once power is restored to the switcher, it will automatically reconnect the
active input. If all inputs are active, it will switch to the HDMI 1 input.
Source Removed: When an active source is removed, the DL-AS31 will switch to the first
available active input.
Manual Switching:
To enable manual switching, select the input of the DL-AS31 by using one of the
following methods:
Contact Closure: Make a contact closure between the desired source and GND contacts.
RS232: Transmit the SET HDMI 1, SET HDMI 2 or SET VGA RS232 commands.
Display On/Off
GND
Automatic display on:
To automatically turn on the display when an active input is connected, slide the CEC
mode switch to the Auto position. When in Auto mode, the DL-AS31 will turn on the
display once an active source has been connected.
Automatic display off:
To automatically turn off the display when no active input is connected, slide the CEC
mode switch to the Auto position. When in Auto mode, the DL-AS31 will turn off the
display after no sources have been connected for three (3) minutes. To increase the
time before power off, send the CEC OFF XX command via RS232.
Manual display on/off:
To manually turn on or off the display, slide the CEC mode switch to the Man position.
When in Man mode, the DL-AS21C can turn on and off the display with active sources
connected to the inputs.
Contact Closure: Make a contact closure between the ON and GND contacts or the OFF
and ground contacts.
RS232: Transmit the DISPLAY ON or DISPLAY OFF RS232 commands.
Display CEC Contact Closure Wiring
DL-AS31
OFF ON
Analog Audio Output Wiring
L+
L-
R+
R-
Unbalanced Audio Connection
Audio
Device
L+
L
R
R+
DL-AS31
L+
L-
R+
R-
Balanced Audio Connection
Audio
Device
L+
L-
R+
R-
RS232 Control
RS232 Settings: 9600 baud, 8 Data bits, 1 Stop bit, Parity = None
A carriage return and line feed must follow all RS232 commands. A carriage return and
line feed will follow all responses.
Input Switching
Description Command Response
Select HDMI 1 input
Select HDMI 2 input
Select VGA input
Get active input
HDCP Configuration
Description Command Response
Turn on HDCP Compliance on active input
Turn off HDCP Compliance on active input
Query HDCP Status
SET HDMI 1 SET HDMI1!
SET HDMI 2 SET HDMI2!
SET VGA SET VGA!
GET IN GET IN!
HDCP ON HDCP ON!
HDCP OFF HDCP OFF!
GET HDCP
Switch to HDMI1!
Switch to HDMI2!
Switch to VGA!
HDMI1! OR
GET IN!
HDMI2! OR
GET IN!
DP!
HDCP ON! OR
HDCP OFF!
CEC Commands
Description Command Response
Turn display (sink) on
Turn display (sink) off
Set CEC auto off time (XX = minutes) (default = 03)
Query CEC auto off time
Query CEC mode
DISPLAY ON DISPLAY ON
DISPLAY OFF DISPLAY OFF
CEC OFF XX CEC OFF Delay XX minutes
GET CEC CEC OFF Delay XX minutes
GET CECMODE
CEC AUTO! OR
CEC Manual!
HDMI EDID
Description Command Response
UHD/30 (3840x2160 at 30 Hz)
WUXGA at 60 Hz (1920x1200 at 60 Hz)
Full HD at 60 Hz (1920x1080 at 60 Hz)
UXGA at 60 Hz (1600x1200 at 60 Hz)
SXGAP at 60 Hz (1400x1050 at 60 Hz)
WXGA2 at 60 Hz (1360x768 at 60 Hz)
WXGA at 60 Hz (1280x800 at 60 Hz)
HD at 60 Hz (1280x720 at 60 Hz)
XGA at 60 Hz (1024x768 at 60 Hz)
EDID pass through
Query EDID
EDID UHD EDID:UHD!
EDID WUXGA EDID:WUXGA!
EDID FHD EDID:FHD!
EDID UXGA EDID:UXGA!
EDID SXGAP EDID:SXGAP!
EDID WXGA2 EDID:WXGA2!
EDID WXGA EDID:WXGA!
EDID HD EDID:HD!
EDID XGA EDID:XGA!
EDID PT EDID :PT!
GET EDID
EDID
VGA Scaling
Description Command Response
Full HD at 60 Hz (1920x1080 at 60 Hz)
HD at 60 Hz (1280x720 at 60 Hz)
WUXGA at 60 Hz (1920x1200 at 60 Hz)
WXGA2 at 60 Hz (1360x768 at 60 Hz)
WXGA at 60 Hz (1280x800 at 60 Hz)
UXGA at 60 Hz (1600x1200 at 60 Hz)
XGA at 60 Hz (1024x768 at 60 Hz)
SXGAP at 60 Hz (1400x1050 at 60 Hz)
Select the best resolution according to the present EDID
Set the output scaling to fit the content to the display
Set the output scaling to fill the content to the display
Query VGA scaling resolution
SCALE FHD Resolution: 1920x1080!
SCALE HD Resolution: 1280x720!
SCALE WUXGA Resolution: 1920x1200!
SCALE WXGA2 Resolution: 1360x768!
SCALE WXGA Resolution: 1280x800!
SCALE UXGA Resolution: 1600x1200!
SCALE XGA Resolution: 1024x768!
SCALE SXGAP Resolution: 1400x1050!
SCALE PT
SET FIT AspectRatio: Fit!
SET FILL AspectRatio: Fill!
GET SCALE
RESOLUTION
Other Commands
Description Command Response
Enter low power mode
Exit low power mode
Get firmware version
Query product model
Reset to factory defaults (EDID at FHD; CEC at 3 mins)
STANDBY STANDBY!
WAKE WAKE
REV? VX.X.X
MODEL? DL-AS31-2H1V
RST System Initializing......
Initialization Finished
Input: HDMI1
VX.X.X
AUTO ON!
Technical Specifications
I/O Connections
HDMI Inputs Two (2) HDMI Type A Receptacle
VGA Input One (1) HD-15 Female Receptacle
Audio Input One (1) 3.5mm TRS Jack
HDMI Output One (1) HDMI Type A Receptacle
Audio Output One (1) 5-pin Removable Terminal Block
Input Select Contact Closures One (1) 5-pin Removable Terminal Block
Manual CEC Contact Closures One (1) 3-pin Removable Terminal Block
RS232 One (1) 3-pin Removable Terminal Block
DC 5V Power One (1) 5.5 mm Outside Diameter, 2.1 mm Inside Diameter
CEC Switch One (1) 3mm Microswitch
Firmware One (1) Micro-B Receptacle
Supported Audio and Video
Maximum Video Compatibility Deep Color 48/36/30/24 Bit at 1080p and 2160p/30
Video Compliance HDMI1.4, HDCP1.4, CEC (Consumer Electronics Control)
HDMI Video Signal Resolution 4096x2160@30Hz,3840x2160@24/25/30Hz,
VGA Video Signal Resolution 1920x1080@24/25/30/50/60Hz,1920x1080@50/60Hz,
HDMI Embedded Audio PCM/Dolby Digital/DTS/DTS-HD
External Audio Signal Stereo audio.
Output Audio Signal Balanced analog audio, compatible with unbalanced
Output Audio Signal to Noise Ratio SNR≥85dB
Output Audio Frequency Response 20 Hz to 20 kHz
Input DDC Signal 5.0 volts p-p (TTL)
Input Video Signal 0.5 to 1.0 volts p-p
Maximum Passive Cable Length 5 m (16 ft)
RS232 Baud Rate 9600 baud
Barrel
1920x1080@24/25/30/50/60Hz, 1920x1080@50/60Hz,
1920x1080i@50/60Hz, 1600x900@60Hz,
1366x768Hz@60Hz, 1280x720Hz@60Hz,
1920x1200@60Hz, 1680x1050@60Hz, 1440x900@60Hz,
1360x768@60Hz, 1280x800@60Hz, 1600x1200@60Hz,
1400x1050@60Hz, 1280x1204@60Hz, 1024x768@60Hz,
800x600@60Hz, 640x480@60Hz
1920x1080i@50/60Hz,
1600x900@60Hz,1366x768Hz@60Hz, 1280x720Hz@60Hz,
1920x1200@60Hz, 1680x1050@60Hz, 1440x900@60Hz,
1360x768@60Hz,1280x800@60Hz, 1600x1200@60Hz,
1400x1050@60Hz, 1280x1204@60Hz, 1024x768@60Hz,
800x600@60Hz, 640x480@60Hz
analog audio
Chassis and Environmental
Enclosure Painted aluminum
Dimensions (W x H x D) 240 mm x 100mm x 30 mm (9.45 in x 3.94 in x 1.18 in)
Shipping Weight 0.85 kg (1.87 lbs.)
Operating Temperature (Environment) 0° to +40° C (+32° to +104° F)
Operating Temperature (Chassis) 31° C (88° F) (S); 38° C (100° F) (R)
Operating Humidity (Environment) 20% to 90%, Non-condensing
Storage Temperature (Environment) -10° to +60° C (+14° to +140° F)
Storage Humidity (Environment) 20% to 90%, Non-condensing
Power, ESD, and Regulatory
Maximum Power Consumption 5 watts
Power Supply Input Voltage 100-240V AC at 50/60 Hz
Power Supply Output Rating DC5V at 3 A
ESD Protection Contact discharge: ±15kV; Air discharge: ±8kV
Device Regulatory CE, RoHS
Power Supply Regulatory CE, RoHS, TUV, UL, SGS
Other
Standard Warranty 2 Years
Diagnostic Indicators Power, Source Mode, Selected Input.
Included Accessories Installation guide, power supply with AC adapters (AU,
EU, UK, and US), RS232 cable, 5-pin terminal blocks (2 ea),
3-pin terminal blocks (2 ea), rubber feet, mounting “L”
brackets (2 ea), mounting screws (4 ea)
Distances and picture quality may be aected by cable grade, cable quality, source and desnaon equipment, RF
and electrical interference, and cable patches.
11675 Ridgeline Dr.
Colorado Springs, CO 80921
Toll-Free: 800-530-8998
Fax: 719-260-0075
www.libav.com
rev 160323
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