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Check our Product Comparison Matrix if you are unsure of which of our microcontroller based boards has the combination of relays, digital inputs and outputs, and analog inputs and outputs that you need.

SI51 16 Channel Programmable Switch Input Controller

Add USB connectivity to your SI51 for just $10 more with the USBCONV.

The Industrologic SI51 switch input controller is a specialized single board computer that is easy to program and easy to connect to external signals. With its 16 switch/contact closure inputs, four logic level I/O signals, and serial port, it is ideal for many contact closure intensive industrial control applications.

The SI51's on-board power supply and its screw terminal connections make the setup for many applications both quick and simple. Plus, its RS-232 interface and simple commands means that it can be easily used as an RS-232 serial data acquisition and control board!

Included with each SI51 is a special version of Tiny Machine Basic (written specifically for the I/O on the SI51), development software, a wall block power supply, and a serial port cable to connect to your PC. (Things you must purchase separately with everyone else's controller or single board computer.) An optional machined ABS plastic enclosure is also available.

The SI51-8K

The SI51 can also be ordered as the SI51-8K, with an 8K EEPROM for program storage and a version of Tiny Machine Basic designed to utilize this extra memory for storing long messages to be sent to the serial port.

The SI51-8K can be used as a message board controller or a counter/timer for large LED displays such as the BetaBrite® Classic, the Grandwell Industries SLC16H-IR, and the Pro-Lite PL-M2014R. You can program the SI51 yourself or contact Industrologic for information about custom programming for the SI51 to provide this functionality.

The SI51-8K also includes instructions specifically for the Industrologic OC16SPI for easy interfacing to this SPI Interface Relay/Lamp/LED Driver Board.

SI51 documents and information:

log file