_UMD - Model 221
Peripheral Controller - Interface Converter

The UMD Model 221 Series Peripheral Controllers are part of the Unique Micro Design ProtoLink Architecture family of products.The Model 221 Series feature inbuilt keyboard wedge, four serial ports, parallel port, cash drawer interface (CDI), magnetic card reader interface and bar code decoder (BCR). An optional Liquid Crystal Display (LCD) of 2 lines by 16 characters. Due to the flexibility of programming, the M221 is ideal for terminal applications, or where there is a limited number of ports available for peripherals. Host communication may be via a serial or parallel port.

Obsolete Product Line - Contact UMD Sales for Alternatives


  • 4 full duplex serial ports
  • One bi-directional parallel port
  • One cash drawer i/f (CDI) with status feedback
  • In-built Bar Code decoder (BCR)
  • Optional Magnetic Card Reader, 1 or 2 track
  • Programmed via keyboard or serial port (also via bar codes when using a bar code reader).
  • PC/XT/AT and PS/2 compatible in keyboard mode
  • Use as serial wedge between host and terminal
  • Optional backlit LCD display (2 lines by 16 characters)
  • No switches to be tampered with
  • Internal buzzer
  • 12 Months warranty


Physical size180 (w) x 120 (d) x 68 (h) (inc feet) mm.
Enclosure/WeightABS Plastic, two tone white/grey, 600 grams
Power sourceVia keyboard interface or external plug pack (9VDC)
Keyboard interfacePC, AT or PS/2 protocol (others available upon request)
Serial interfaceFour RS-232C DB9 plug (DTE) ports Pin 7, 5 Volt supply for bar code scanners
Baud rates300, 1200, 2400, 4800, 9600, 19.2K, 38.4K
HandshakeDTR, XON/XOFF
Bar Code DecoderDigital wand type, Squeeze to release AMP D9 Plug
SymbologiesCode 128, code 39, interleaved 2 of 5 and EAN/UPC, auto discrimination
Parallel InterfaceBi-directional, DB25 socket, PC compatible
Cash Drawer Interface24 Volt (peak) 1 A, 250ms pulse, Status feedback via external switch
Liquid Crystal Display (option)2 lines by 16 characters (LED back light)
Located on opposite panel from connectors

The Model 221 Custom Peripheral Controller can be uniquely configured to your customer requirements.
Please contact Technical Support to discuss customisation and other options.

Obsolete Product Line - Contact UMD Sales for Alternatives