_UMD - Model 335 Custom LCD
Computer - Terminal

The Unique Micro Design Model 335 Series of Custom Desk/Wall Mount LCD Terminals is a member of the ProtoLink Architecture family of products. Custom Desk/Wall Mount LCD Terminals are packaged in an industrial semi-sealed plastic enclosure. The Model 335 has flexible interfacing options incorporating dual RS232 serial, AT keyboard interface, magnetic card reader interface and bar code decoder. An optional RS485 interface is also available, with the Model 335 typically being used as a node in a UMD ProtoLink Network. Power is sourced externally from either a 5 Volt regulated or upto 28 Volts unregulated supply. The Model 335 features a 4 x 5 programmable sealed keypad or 5 x 6 keycap keypad. The backlit liquid crystal display ( LCD ) has 4 lines of 20 characters. The sealed keypad uses low travel mechanical keys which are sealed with a polycarboate overlay. The keycap keypad uses relegendable single, dual or quad keycaps.

Obsolete Product Line - Contact UMD Sales for Alternatives


  • Programable keys (4x5 sealed or 5x6 keycap type)
  • Multiple shift levels
  • In-built keyboard wedge and 2 serial ports
  • 5 programmable LED indicators
  • In-built Bar Code decoder
  • Programmed via keyboard or serial port
  • Backlit LCD display (4 lines by 20 characters)
  • No switches to be tampered with
  • Internal buzzer
  • Customisation service available
  • 12 Months warranty


Physical size170 (w) x 280 (d) x 125 (h) mm.
Enclosure/WeightABS Plastic / 1.5kg
Power sourceVia keyboard interface or external plug pack (5Vdc optional 9Vdc)
Keyboard interfacePC, AT or PS/2 protocol (others available upon request)
Key matrixSealed type: 20 in 4 x 5 matrix
Keycap type: 30 in 5 x 6 matrix (used UMD KA series keycaps)
Reliability1,000,000 operations
Display UnitLiquid Crystal Display with LED backlight, 4 lines by 20 characters 3 mm character height
LED Indicators5 user LEDís amber color user programmable
Serial interfaceTwo RS-232C (DTE) ports
Baud rates300, 1200, 2400, 4800, 9600, 19.2K, 38.4K
HandshakeDTR, XON/XOFF
Bar Code DecoderDigital wand type
SymbologiesCode 128, code 39, interleaved 2 of 5 and EAN/UPC
OptionsRefer to ordering information below

The Model 335 Custom Controller can be uniquely configured to your customer requirements.
Please contact Technical Support to discuss customisation and other options.

M335 Confuguration Table


Keypad Type



Keycap type, 5 x 6 matrix (3-1240 series)

Sealed type, 4 x 5 matrix (3-1081 series)

Firmware Option



Default firmware

Custom Firmware

Magnetic Card Reader Option




No MCR Option

Single Track MCR, where x = 1, 2, or 3

Dual Track MCR, where xy = 12 or 23

M301 Hardware Option



Standard Regulator Type

Switching Regulator

Panel Modification Option





2 x Serial, BCR Wand, KBD Wedge + DC Power

2 x Serial, RS-485, DC Power (Incomplete)

4 x Serial, KBD Wedge + DC Power (Requires M301 I/O)

2 x Serial, Digital I/O, DC Power (Requires Digital I/O)(Incomplete)

Mounting Option



Desktop Mount

Wall Mount

Keycap/Overlay Option



Keycap Type, Keycap Set

Sealed Type, Overlay


Obsolete Product Line - Contact UMD Sales for Alternatives