HDMI + VGA Auto-Switcher with CEC Control

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DL-AS21C - HDMI + VGA Auto-Switcher with CEC Control

Product Overview

Features and Benefits

  • HDMI supports 1080p, 3D and 4K video and 2.0/5.1 audio
  • VGA supports up to 1920x1200 with audio embedding
  • Built-in EDID settings and EDID pass-through
  • HDMI output with CEC control of display
  • Manual, RS232, contact closure & automatic switching


  • Under-table switcher for conference tables
  • Easy integration of legacy components into a digital environment
  • Analog to digital conversion
  • Ideal for corporate facilities, churches, schools, and conference centers

DL-AS21C Summary

The DigitaLinx DL-AS21C is a compact multi-format switcher with support for video resolutions up to UHD (4096x2160). Featuring one HDMI input and one VGA input with stereo audio, the DL-AS21C automatically or manually switches either input to a single HDMI output.

The DL-AS21C features multiple methods of control. When set to Auto, the switcher will automatically switch to the newest source device added to the DL-AS21C with VGA taking precedence should multiple sources be live simultaneously. The DL-AS21C may be manually controlled by switching via the front panel, RS232, or contact closure.

As an added benefit, the DL-AS21C features a built-in CEC controller to power on/off the connected display by auto-selecting the source device’s status.

DL-AS21C Diagrams

No available cross references for DL-AS21C

Alternates that meet or exceed DL-AS21C specifications

No equivalent alternates available for DL-AS21C

HDMI + VGA Auto-Switcher with CEC ControlHDMI + VGA Auto-Switcher with CEC ControlHDMI + VGA Auto-Switcher with CEC ControlHDMI + VGA Auto-Switcher with CEC ControlHDMI + VGA Auto-Switcher with CEC ControlHDMI + VGA Auto-Switcher with CEC Control

Supporting Documents

DL-AS21C Install Guide


PDF Spec Sheet

Product Line:   DL-AS21C
I/O Connections
HDMI InputOne (1) HDMI Type A Receptacle
VGA InputOne (1) Female HD15-F Connector
Analog Audio InputOne (1) 3.5mm TRS Jack
HDMI OutputOne (1) HDMI Type A Receptacle
RS232One (1) 3-Pole/3.5mm Euroblock
CEC On/Off Contact ClosureOne (1) 3-Pole/3.5mm Euroblock
HDMI/VGA Select Contact Closure with LEDOne (1) 5-Pole/3.5mm Euroblock
Auto Mode SwitchOne (1) Two-position Switch
CEC On/Off SwitchOne (1) Two-position Switch
12V DC Power One (1) Threaded Barrel (5.5 mm OD; 2.6 mm ID)
Front Panel ControlFour (4) Pushbuttons
Supported Audio, Video, and Control
Supported Input Resolutions (HDMI/DVI)800x600@60Hz, 800x600@72Hz, 800x600@75Hz, 1024x768@42Hz, 1024x768@60Hz, 1024x768@70Hz, 1024x768@75Hz, 1024x768@85Hz, 1152x864@75Hz, 1280x768@60Hz, 1280x768@75Hz, 1280x768@85Hz, 1280x960@60Hz, 1280x960@85Hz, 1280x1024@60Hz, 1280x1024@75Hz, 1280x1024@85Hz, 1365x1024@60Hz, 1365x1024@60Hz, 1600x1024@60Hz, 1600x1200@60Hz, 1600x1200@65Hz, 1600x1200@70Hz, 1600x1200@75Hz, 1600x1200@85Hz, 1680x1050@60Hz, 1792x1344@60Hz, 1856x1392@60Hz, 1856x1392@75Hz, 1920x1080@60Hz, 1920x1200@60Hz, 1920x1440@60Hz, 3840x2160@24Hz, 3840x2160@30Hz, 3840x2160@25Hz, 4096x2160@24Hz, 4096x2160@25Hz, 4096x2160@30Hz
Supported Input Resolutions (VGA)800x600@60Hz, 800x600@72Hz, 800x600@75Hz, 1024x768@60Hz, 1024x768@70Hz, 1024x768@75Hz, 1280x768@60Hz, 1280x768@75Hz, 1280x960@60Hz, 1280x1024@60Hz, 1280x1024@75Hz, 1365x1024@60Hz, 1365x1024@75Hz, 1600x1024@60Hz, 1600x1200@60Hz, 1600x1200@65Hz, 1600x1200@70Hz, 1600x1200@75Hz, 1680x1050@60Hz, 1792x1344@60Hz, 1920x1080@60Hz, 1920x1200@60Hz
Video ComplianceHDMI, HDCP
HDMI EDIDPass-through from Display
VGA EDID (set via RS232)1024x768, 1280x720, 1280x800, 1600x1200, 1920x1080, 1920x1200
Embedded Audio Input/OutputPCM 2 channel; AAC 5.1
Analog Audio Frequency Response20Hz-20KHz
Analog Audio Input Impedance>10k ohm
Analog Audio Output Impedance50 ohm
Input DDC Signal5.0 volts p-p (TTL)
Input Video Signal0.5 to 1.0 volts p-p
Maximum Passive HDMI Distance5 m (16 ft)
RS232 Baud Rate9600 baud
Chassis and Environmental
EnclosurePainted steel
Dimensions (H x W x D)28 mm x 350 mm x 110 mm (1.10 in x 13.78 in x 4.33 in)
Shipping Weight0.82 kg (1.8 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 Consumption3.8 watts
Power Supply Input Voltage100-240v AC at 50/60 Hz at 0.45 A
Power Supply Output Rating5V DC at 3 A
ESD Protection15kV
Device RegulatoryRoHS
Power Supply RegulatoryCE, RoHS, UL, TUV, FCC
Standard Warranty2 Years
Diagnostic IndicatorsPower, Selected Input
Included ItemsInstallation guide, power supply, AC adapter (US), three pole terminal blocks (2 ea), five pole terminal blocks ( 1 ea), mounting “L” brackets (2 ea), mounting screws (4 ea)
Distances and picture quality may be affected by cable grade, cable quality, source and destination equipment, RF and electrical interference, and cable patches.

DL-AS21C Firmware

DL-AS21C Software

DL-AS21C Pre-made Drivers

Disclaimer: Liberty AV assumes no responsibility or liability for pre-built control system drivers. The driver may or may not work for all projects, in situations where the driver is not suitable for the switching architecture, the driver cannot be adjusted for customized usage by Liberty. If you would like to contract services for customized control for a project please contact your sales representative.

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