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SI5150 50 Channel Programmable Switch Input Controller - $319

SI5150 Enclosure - $80

picture of SI5150
SI5150 shown in its optional ABS enclosure


The Industrologic SI5150 is an Atmel AT89C4051 microcontroller based board designed to read 50 switches or other contact closures. In addition to these contact closure inputs, it includes one external logic level I/O signal, an internal auxiliary logic level signal, an RS-232 serial port, an on-board software readable push-button switch, and a software programmable LED.

The SI5150 includes, pre-programmed into the microcontroller, a special version of Tiny Machine Basic, Industrologic's simple programming language, written for the hardware on the SI5150. By using this language the user can quickly and easily program the SI5150 to perform a number of tasks, including controlling the digital I/O line or sending character strings to a host computer in response to contact closures. The microcontroller chip can also be re-programmed using any number of software development tools available for similar Atmel microcontrollers.

The SI5150 printed circuit board is designed to mount directly into the Bud Industries PRM-14460 ABS rack/table mount enclosure. This enclosure can be quickly converted from rack mounting to table top use and includes all required brackets for both configurations.

  • Based on the Atmel AT89C4051 microcontroller operating at 11.0592 MHZ
  • 50 switch/contact closure inputs with LED indicators to show on/off status
  • 1 digital logic level signal usable as an interrupt input, general purpose input, or output
  • 1 internal auxiliary I/O board connection, a digital logic level signal, +5 volts, and ground
  • Convenient screw terminal block connections for all contact closure and digital I/O connections
  • Serial RS-232 port with true RS-232 interface and DB9F connector matching PC compatibles
  • General purpose software readable pushbutton switch and software programmable LED
  • 512 byte EEPROM for storage of small programs or configuration information
  • On-board +5 volt power supply including screw terminal connection for external circuitry
  • Pin-type power connector for easy connection to wall block power supplies
  • Tiny Machine Basic programming language for the SI5150 programmed into the microcontroller
  • EEPROM based AT89C4051 can be re-programmed using common Intel 8051/Atmel AT89Cxx51 software development tools and device programmer

The SI5150 package is shipped complete with all items necessary to immediately begin application development:

  • The SI5150 circuit board
  • A serial port cable for connection to a PC compatible computer
  • A wall-block power supply
  • Host computer software and programming examples
  • Hardware and software reference manuals



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