This add-on module allows you to create an interface between an MI0235 MIAC automation controller and conventional TTL-level systems, to allow you access to commonly used serial buses. The unit includes RS232 and RS485 bus interfaces as well as TTL level serial buses (SPI, I2C and USART). The unit also includes a number of TTL-level I/O lines and a FAT16/32-compatible SD card slot.

The MIAC Serial Expansion Module is designed in particular to provide a wide range of serial communication interfaces. In addition to generic I/O, two PWM outputs and five ADC inputs, this module also provides TTL-level interfaces for I2C, SPI and UART serial communication protocols. The front panel provides access to a second UART via a DCE 9-way D-type socket with RS232-level signals. This module also incorporates an SD memory card slot for data logging, storing and retrieval applications.

MIAC Serial Expansion Module Features

• 18x TTL-level I/O pins
• SPI bus
• I2C bus
• UART TTL-level serial bus
• RS232 interface (DB9F)
• 2x PWM outputs
• 5x ADC inputs, 12-bit
• SD card slot

Supported Flowcode Components

MIAC Expansion Modules Technical Specifications
Power supply	Typical voltage range	10-12V
	Maximum voltage	16V
	Typical current	100-200mA
	Maximum current	< 2A
I/O terminals	Maximum output current	6mA
	Input high	> 4V
	Input low	< 1V
	Input impedance (0-5V)	> 1MΩ
	Typical input voltage range	0-5V
	Maximum input voltage	-7V, +12V
	Analog sensitivity (0-5V)	5mV
Processor	dsPIC30F5013, 66K ROM, 4K RAM
Environmental	Operating temperature	-5 to +50 °C
	Storage temperature	-40 to +70 °C

Internal Block Schematic

• Video: MIAC Expansion Modules Introduction, Part 1
• Video: MIAC Expansion Modules Introduction, Part 2
• Video: MIAC Expansion Modules Wiring Guide