External 20x4 Character LCD Enclosure HMI using Serial RS232, TTL, USB, I2C, RS422 with 7 key tactile keypad, 3 dual colour LED's, 5V, 12V, 24V power with RGB Backlight

The ELK204-7T is an External 20x4 Intelligent Character LCD display. Engineered to quickly and easily add an elegant HMI to any application. Multiple communication protocols such as Serial RS232, TTL, I2C, and USB communication models allow the ELK204-7T Graphic LCD to be connected to a wide variety of host controllers.

Our Character LCD provides you with a cost-effective industrial HMI user interface solution for that great product/project you are developing. This LCD displays features optional on-board large and medium digits all with the convenience of a 7 key backlit tactile keypad will allow fast development for any application.


  • External 20x4 Character LCD Enclosure
  • ABS Plastic external enclosure with screw mounting
  • Metal external enclosure with mounting brackets
  • Available Interfaces: Serial RS232, TTL, I2C, and USB
  • 7 key backlit tactile keypad
  • 3 dual colour indication status LEDs
  • Software controlled contrast and brightness with configurable time-out setting up to 90 minutes
  • Built in Horizontal or Vertical bar graphs
  • Extended temperature available for extreme environments of -20C to 70C
  • Fast and easy development
  • Designed, supported and Made in CANADA
  • Long life cycle
  • Backed by Matrix Orbital's decades of research and development

NOTE: The RS232/I2C/TTL versions do not come with a communication/power cable. Please review the technical manual for the communication/power connector pinout.

Family/SeriesExternal Display
Display TypeCharacter LCD
Backlight TypeLED
Viewing Area Width (mm)82
Viewing Area Height (mm)36
Active Area Width (mm)77
Active Area Height (mm)23.6
Resolution Width (Pixels)100
Resolution Height (Pixels)32
Pixel Pitch Width (mm)0.65
Pixel Pitch Height (mm)0.65
Pixel Width (mm)0.6
Pixel Height (mm)0.6
Character Columns20
Character Rows4
Character Pitch Width (mm)3.9
Character Pitch Height (mm)6.15
Character Width (mm)3.2
Character Height (mm)5.15
Viewing DirectionTop
Viewing Angle60
Haptic FeedbackNone
Audio FeedbackNone
Advanced GPO'sNone
DOWOptional, 1
Integrated LED's3
EnclosureMetal, Plastic
InterfaceRS232, TTL, I2C, USB
Command ProtocolMatrix Orbital
Negative VoltageIntegrated
Backlight DriverIntegrated
Minimum Voltage (Vdc)3.3
Typical Voltage (Vdc)3.3, 5
Maximum Voltage (Vdc)5
HeaderTerminal Block
Min. Operating Temp. (°C)0, -20
Max. Operating Temp. (°C)50, 70
Min. Storage Temp. (°C)-30, -10
Max. Storage Temp. (°C)60, 80


 File NameRevisionSize 
 File NameRevisionSize 
Enclosures  Serial Enclosure Manual1.31.17MiB
ELK204-7T-USB-PL  USB Enclosure Manual906.2KiB
ELK204-7T-USB-MT  USB Enclosure Manual906.2KiB
ELK204-7T-PL  -PL Enclosure Drawing54.72KiB
ELK204-7T-USB-PL  -PL Enclosure Drawing54.72KiB
ELK204-7T-MT  -MT Enclosure Drawing1.03MiB
ELK204-7T-USB-MT  -MT Enclosure Drawing1.03MiB

Application Notes

 File NameRevisionSize 
 File NameRevisionSize 
Application Notes  eGTT50-TPR Drawing (Rev 1.0).pdf327.29KiB


TPN: non touch, TPR: resistive touch, TPC: capacitive touch

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  • PCB Rev: 1
  • Model: ELK204-7T
  • Availability: In Stock (Build to Order)
  • $89.99USD
  • 25 or more $98.28USD
  • 50 or more $95.22USD
  • 100 or more $92.15USD
  • 500+ : Contact us

Tags: ELK204-7T, XES635BK