[OLIMEX]

OVERVIEW

Thank you for choosing the MOD-IO extension module from Olimex! This document provides a user’s guide for the MOD-IO board. As an overview, this chapter gives the scope of this document and lists the board’s features. The document’s organization is then detailed.
The MOD-IO board allows easy expansion of the functionality of other boards by adding relays, optocouplers and analog inputs.
MOD-IO is an open-source, open-hardware project and all documentation is available to the customer.

FEATUREs
The board has the following set of features:
• Open source hardware board with ATMega16L-8AU microcontroller
• 4-optocoupler isolated inputs with screw terminals
• Input status LEDs
• 4-relay outputs with 5A/250VAC contacts with screw terminals
• Output status LEDs
• Stackable
• ICSP 5×2 pin connector for in-circuit programming with AVR-ISP500 and AVR-ISP-MK2 or another compatible ICSP programmer
• JTAG 5×2 pin connector for in-circuit programming with AVR-JTAG, AVR-JTAG-USB or another compatible JTAG debugger
• EXT extension connector for the unused AVR ports
• Status LED
• Reset IC ZM33064
• Quartz crystal oscillator circuit 8MHz
• DC-DC with input voltage 8-30VDC – this board can be powered from 24V industrial power supplies
• Power plug-in jack
• Four mounting holes 3.3 mm (0.13")
• FR-4, 1.5 mm (0.062"), red soldermask, white silkscreen component print
• Dimensions 80×100 mm (3.9×3.15")