MAXREFDES63#

MAXREFDES63# Datasheet

MAXREFDES63# 8-CHANNEL DIGITAL OUTPUT MICRO PLC CARD

Part	Datasheet
MAXREFDES63#	MAXREFDES63# (pdf)

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System Board 5976 MAXREFDES63# 8-CHANNEL DIGITAL OUTPUT MICRO PLC CARD DETAILS MAXREFDES63# System Board Page 1 of 6 Enlarge+ Introduction The MAXREFDES63# reference design Figure 1 features eight-channel digital outputs with isolated power and data. The design integrates a 600VRMS data isolation MAX14850 a STM32F1 microcontroller a FTDI USB-UART bridge a high-efficiency DC -DC converter MAX17515 and isolated/regulated +22V, and +5V power rails MAX17498C . The entire system typically operates at less than 400mW and fits into a space roughly the size of a credit card. Page 2 of 6 Figure The MAXREFDES63# reference design block diagram. • Isolated power and data • Micro PLC form factor • Device drivers • Example C source code • Industrial control and automation • Process control • PLC Detailed Description of Hardware The power requirement is shown in Table Table Power Requirement for the MAXREFDES63# Reference Design Power Type On-board isolated power Input Voltage V 24 Input Current mA, typ 15 All LEDs on + Load Current Note STM32 and FTDI are powered by USB separately. The MAX14900 U400 is an octal power switch with per-channel configuration feature. The ultra-efficient MAX17498C U102 generates the isolated +22V, and +5V rails from a 24V supply. The MAX14850 U301 digital data isolators provide data isolation. The combined power and data isolation achieved is 600VRMS. The MAX17515 U101 step-down DC-DC converter converts the +5V supply from the USB to +3.3V and powers the STM32 U1 microcontroller and FTDI U201 USB-UART bridge. Detailed Description of Firmware The MAXREFDES63# uses the on-board STM32F1 microcontroller to communicate with the octal power switch. The user enters configuration data through a terminal program and the digital outputs will be updated. The simple process flow is shown in Figure The firmware is written in C using the Keil µVision5 tool. Page 3 of 6 Figure The MAXREFDES63# firmware flowchart. The complete source code is provided to speed up customer development. Code documentation can be found in the corresponding firmware platform files. Quick Start Required equipment • PC with a USB port • MAXREFDES63# board • 24V power supply Procedure The complete source code is provided to speed up customer development. Code documentation can be found in the corresponding firmware platform files. Turn off or keep off the 24V power supply. The MAXREFDES63# utilizes the FTDI USB-UART bridge IC. If Windows cannot automatically install the driver for the FTDI USB-UART bridge IC, the driver is available for download from Connect the negative terminal of the 24V power supply to the PGND connector on the MAXREFDES63# board. Connect the positive terminal of the 24V power supply to the +24V connector on the MAXREFDES63# board. Turn on the 24V power supply. Connect the USB cable from the PC to the MAXREFDES63# board. Open Hyperterminal or similar Terminal program on the PC. Find the appropriate COM port, usually a higher number port, such as COM4, or COM6, and configure the connection for 921600, n, 8, 1, none flow control . The MAXREFDES63# software will display a menu Figure 3 Press any key in the terminal program to start the output configuration. Enter the Configuration Byte in hex format. Enter the desired output data in hex format. Verify the output status by observing the 8 green LEDs under connectors J400 and J401 on the board. These LEDs are connected to the digital outputs of the card. Page 4 of 6 Figure Terminal program main menu. Lab Measurements Figure 4 and Figure 5 shows the status of the LEDs with the output configuration byte set to 0xFF and the output data byte set to 0xAA. Figure Test setup. Figure Test outputs. Reference

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System Board 5976

MAXREFDES63# 8-CHANNEL DIGITAL OUTPUT MICRO PLC CARD

DETAILS

MAXREFDES63# System Board

Page 1 of 6

Enlarge+

Introduction

The MAXREFDES63# reference design Figure 1 features eight-channel digital outputs with isolated power and data. The design integrates a 600VRMS data isolation MAX14850 a STM32F1 microcontroller a FTDI USB-UART bridge a high-efficiency DC -DC converter MAX17515 and isolated/regulated +22V, and +5V power rails MAX17498C . The entire system typically operates at less than 400mW and fits into a space roughly the size of a credit card.

Page 2 of 6

Figure The MAXREFDES63# reference design block diagram.
• Isolated power and data
• Micro PLC form factor
• Device drivers
• Example C source code
• Industrial control and automation
• Process control
• PLC

Detailed Description of Hardware

The power requirement is shown in Table

Table Power Requirement for the MAXREFDES63# Reference Design

Power Type On-board isolated power

Input Voltage V 24

Input Current mA, typ 15 All LEDs on + Load Current

Note STM32 and FTDI are powered by USB separately.

The MAX14900 U400 is an octal power switch with per-channel configuration feature.

The ultra-efficient MAX17498C U102 generates the isolated +22V, and +5V rails from a 24V supply. The MAX14850 U301 digital data isolators provide data isolation. The combined power and data isolation achieved is 600VRMS.

The MAX17515 U101 step-down DC-DC converter converts the +5V supply from the USB to +3.3V and powers the STM32 U1 microcontroller and FTDI U201 USB-UART bridge.

Detailed Description of Firmware

The MAXREFDES63# uses the on-board STM32F1 microcontroller to communicate with the octal power switch. The user enters configuration data through a terminal program and the digital outputs will be updated. The simple process flow is shown in Figure The firmware is written in C using the Keil µVision5 tool.

Page 3 of 6

Figure The MAXREFDES63# firmware flowchart. The complete source code is provided to speed up customer development. Code documentation can be found in the corresponding firmware platform files.

Quick Start

Required equipment
• PC with a USB port
• MAXREFDES63# board
• 24V power supply

Procedure

The complete source code is provided to speed up customer development. Code documentation can be found in the corresponding firmware platform files.

Turn off or keep off the 24V power supply. The MAXREFDES63# utilizes the FTDI USB-UART bridge IC. If Windows cannot
automatically install the driver for the FTDI USB-UART bridge IC, the driver is available for download from

Connect the negative terminal of the 24V power supply to the PGND connector on the MAXREFDES63# board. Connect the positive terminal of the 24V power supply to the +24V connector on the MAXREFDES63# board.

Turn on the 24V power supply. Connect the USB cable from the PC to the MAXREFDES63# board. Open Hyperterminal or similar Terminal program on the PC. Find the appropriate

COM port, usually a higher number port, such as COM4, or COM6, and configure the connection for 921600, n, 8, 1, none flow control . The MAXREFDES63# software will display a menu Figure 3 Press any key in the terminal program to start the output configuration. Enter the Configuration Byte in hex format. Enter the desired output data in hex format. Verify the output status by observing the 8 green LEDs under connectors J400 and J401 on the board. These LEDs are connected to the digital outputs of the card.

Page 4 of 6

Figure Terminal program main menu.

Lab Measurements

Figure 4 and Figure 5 shows the status of the LEDs with the output configuration byte set to 0xFF and the output data byte set to 0xAA.

Figure Test setup.

Figure Test outputs. Reference

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived MAXREFDES63# Datasheet file may be downloaded here without warranties.

Datasheet ID: MAXREFDES63# 647477