システムボード 6332

MAXREFDES130#: Building Automation Shield



MAXREFDES130# is an Arduino® form-factor shield compatible with ARM® mbed™ and Arduino platforms providing a complete reference for prototyping your next building automation design. This design includes eight 0VDC-10VDC analog outputs, one 4-20mA output, one 4-20mA input, eight nonlatching relays, three latching relays, an RTC, and 1-Wire® master. The MAXREFDES130# works well with one or more of the MAXREFDES131#, the 1-Wire®, Grid EYE® sensor, to make a complete building automation solution.

Refer to the Details tab for more information. Design files and firmware can be downloaded from the Design Resources tab. As with all Maxim reference designs, boards are available for purchase.

MAXREFDES130# System Board 拡大表示+

Features

  • Analog IO
    • Eight OVDC-10VDC outputs
    • One 4-20mA Output
    • One 4-20mA Input
  • Arduino compatible
  • ARM mbed compatible
  • AC load switching
  • Latching relays for thermostat control
  • RTC

Competitive Advantages

  • Accelerated development time
  • Flexible analog for multiple configurations
  • Ease of use

Applications

  • Building automation
  • IoT
  • Animatronics
  • Holiday displays

Introduction

Buildings, the stages upon which we play out our personal and business lives, provide tremendous benefits with automation. Energy savings, comfort, and enhanced safety and security are a few of the substantial benefits. In order to maximize these benefits, legacy systems must be integrated with modern control and communications. Enter MAXREFDES130#. This unique design features multiple analog IO, matching the 0V to 10V and 4-20mA systems that are embedded in many buildings and control systems. In addition, both nonlatching and latching relays provide the ability to control multiple power lines and control temperature, both saving energy and ensuring a comfortable climate. Most importantly, MAXREFDES130# features a 1-Wire® master bus for use with MAXREFDES131#, the 1-Wire® Grid-EYE® sensor, bringing modern presence and gesture sensing feedback to the platform.


MAXREFDES130# System Board 拡大表示+

MAXREFDES130# is an Arduino® form-factor shield compatible with ARM® mbed and Arduino platforms providing a complete reference for prototyping your next building automation design. The design includes eight 0VDC-10VDC analog outputs, one 4-20mA output, one 4-20mA input, eight nonlatching relays, three latching relays, an RTC, and 1-Wire master.

Libraries supporting the MAX11300 or PIXI, MAX4822, DS3231, and 1-Wire have been developed for both mbed and Arduino to support rapid prototyping with MAXREFDES130#. Demonstration programs for both Arduino and mbed are available at the following links respectively.

MAXREFDES130# Arduino Demo

MAXREFDES130# mbed Demo

Figure 1 outlines the generation of the different voltage rails used in MAXREFDES130#.

A single 24VDC power supply, either the provided wall-adapter or a user-supplied bench power supply, provides power to the design through either J1 or TB11, respectively. Use JP1 to select either the wall adapter or the bench supply.

The dual output MAX17521 and single-output MAX15062 efficiently step down the 24V input to the following voltage rails;

  • MAX17521, 5V at 0.5A for the 5V coils of the nonlatching relays K1-K9.
  • MAX17521, 7.3V at 0.5A sourcing VIN of the user-supplied mbed or Arduino platform.
  • MAX15062, 12V AVDDIO positive supply for mixed signal IO of the PIXI.

The output of the MAX15062 is further converted to the following rails;

  • MAX5091A, 5V AVDD analog supply of the PIXI.
  • MAX5091B, 3.3V DVDD digital supply of PIXI, DS2484, DS3231, and logic-level translators.
  • MAX889, -2V AVSSIO negative supply for mixed signal IO of the PIXI.

All six voltage rails have LED indicators, D3-D8, providing visual indication of their operation.

Figure 1. MAXREFDES130# power path.

Figure 2 provides a block diagram of MAXREFDES130# sub-systems.

The MAX3392, MAX3393, and MAX3394 provide logic-level translation between the host platform and MAXREFDES130#. The platform side of the LTs use IOREF of the platform as a reference. The other side is 3.3V logic. All DIO of the Arduino pin configuration, D0-D15, is used for the reference design except for D0-D3. D0 and D1 are broke out to 0.1in male header H6.

The MAX4822 relay driver interfaces to the host controller over the SPI bus and controls nonlatching relays K1-K8. The contacts of K1-K8 are rated for 250VAC/100VDC 10A max. The MAX11300, PIXI, also interfaces to the host controller over the SPI bus and is configured for nine DAC outputs, three GPO, and one ADC. The first eight DAC outputs source the 0V-10V analog outputs at TB9. The ninth DAC output provides the control signal for the MAX44244 op-amp configured as a difference amplifier, which drives Q1 pass transistor for sourcing the 4-20mA output AIO at TB12. The three GPO configured ports drive the coils of the latching relays K9-K11. The ADC-configured port senses the 4-20mA input AII using a sense resistor.

The DS3231 RTC and DS2484 1-Wire master both interface to the host controller over the I2C bus. A DS2431 1-Wire EEPROM allows for saving calibration data for the 4-20mA loop. Additional 1-Wire slaves can be accessed with the 6P6C RJ-11 jack J2. 3.3V limited to 0.1A is available at pin 1 of J2.

All six voltage rails have LED indicators, D3-D8, providing visual indication of their operation.

More detailed image.
Figure 2. MAXREFDES130# block diagram.

Detailed Description of Firmware

A terminal based demonstration program providing menu options for exercising the features of the reference design has been developed for both Arduino and mbed platforms. The source code of the demo also provides a reference on how to use the provided libraries for each of the following devices; DS3231 RTC, MAX4822 relay driver, MAX11300 mixed-signal IO, and the DS2484 1-Wire master.

Figure 3 provides a flow chart for the demo program.

All six voltage rails have LED indicators, D3-D8, providing visual indication of their operation.

More detailed image.
Figure 3. MAXREFDES130# firmware flow chart.

Quick Start

Required equipment:

  • Windows® PC with a USB port
  • MAXREFDES130#
  • Arduino or mbed platform

Procedure:

1. Connect MAXREFDES130# to your platform board.
2. Ensure JP1 is installed on pins 1-2.
3. Connect the appropriate USB cable for your platform from the PC to your platform.
4. Plug the provided wall adapter into the wall and connect to J1 of MAXREFDES130#.

mbed.org

5. If you have never used mbed, set up an account and add your platform to your online compiler per the instructions on your platform's product page.
6. If you are using Windows and have never used serial communications between your PC and your mbed platform, follow the instructions here.
7. Navigate your browser to this link.
8. Click the 'Import this program' button and import the demo as a 'program.
9. Compile and download the resulting binary to your platform.
10. Open Hyperterminal, or your favorite terminal emulator, find the appropriate COM port for your platform, and configure the connection for 57600bps, 8-N-1 with no flow control.
11. Ensure the terminal is configured for 'Auto' receive and 'CR+LF' transmit.

Press the reset button on your platform and exercise the demo.

Arduino

5. Download the firmware files for Arduino from the design resources tab of MAXREFDES130#.
6. Install the libraries following the directions here.
7. Add the demo program to your 'sketches' folder.
8. Ensure that you have the COM port your Arduino board is connected to selected in the Arduino IDE.
9. Download the example program to your Arduino board.
10. Open Hyperterminal, or your favorite terminal emulator, find the appropriate COM port for your platform, and configure the connection for 57600bps, 8-N-1 with no flow control.
11. Ensure the terminal is configured for 'Auto' receive and ‘CR+LF’ transmit.
12. Select 'local echo' for your terminal emulator.

Arduino is a registered trademark of Arduino LLC.
ARM and MBED are registered trademarks of ARM Holdings.
Grid-EYE is a registered trademark and registered service mark of Panasonic Corporation.
PIXI is a trademark of Maxim Integrated Products, Inc.
Windows is a registered trademark and registered service mark of Microsoft Corporation.

Quick Start

Required equipment:

  • Windows® PC with a USB port
  • MAXREFDES130#
  • Arduino or mbed platform
Procedure
 
Status:
Package:
Temperature:

MAX17521
60V、1A、デュアル出力、高効率、同期整流ステップダウンDC-DCコンバータ

  • 外付け部品および総コストを削減
  • DC-DCレギュレータの在庫数を削減
  • 消費電力を低減

MAX11300
PIXI、20ポートプログラマブルミックスドシグナルI/O、12ビットADC、12ビットDAC、アナログスイッチ、およびGPIO内蔵

  • 20の設定可能ミックスドシグナルポートによってプラットフォーム全体の設計の柔軟性を最大化
  • 特定アプリケーションの要件に適応しシステムニーズの変化に応じて容易に再設定可能
  • 高い機能設定能力によってPCBレイアウトの最適化が可能

DS2484
シングルチャネル1-Wireマスター、可変タイミングおよびスリープモード内蔵

  • I2Cホストインタフェースは100kHzおよび400kHzのI2C通信速度をサポート
  • 標準およびオーバードライブ1-Wire通信速度
  • 調整可能な1-Wireタイミング:tRSTL、tMSP、tW0L、およびtREC0

MAX15062
60V、300mA、超小型、高効率、同期整流ステップダウンDC-DCコンバータ

  • 外付け部品を削減し総コストを低減
  • DC-DCレギュレータの在庫数を削減
  • 消費電力を低減

MAX44244
36V、高精度、低電力、90µA、シングル/クワッド/デュアルオペアンプ

  • 敏感な高精度アプリケーション用に消費電力を低減
  • マキシムの特許取得済みオートゼロ回路による精度の向上によって較正コストが不要
  • センサーインタフェースとトランスミッタに最適な低ノイズ

MAX5091
リセットおよびパワーフェイル入力/出力付き、28V、100mA、低自己消費電流LDO

  • 広い動作入力電圧範囲:+5V~+28V
  • 40Vの入力電圧トランジェントに対する耐性
  • 保証出力電流:100mA

MAX13202E
2/4/6/8チャネル±30kV ESD保護、µDFNパッケージ

  • 高速データラインのESD保護
  • 小型µDFNパッケージ
  • 小さい入力容量:6pF

MAX3394E
スピードアップ回路内蔵、±15kV ESD保護、大駆動電流のデュアル/クワッド/オクタル(8回路)レベル変換器

  • VCC_ラインのI/O上で±15kVのESD保護
  • 方向設定端子不要で、双方向レベル変換
  • VL_のI/OおよびVCC_のI/Oで10mAのシンク電流/15mAのソース電流能力

MAX4822
高速リカバリタイムおよび省電力モード付き、+3.3V/+5V、8チャネル、リレードライバ

  • 内蔵のツェナーキックバック保護によって高速リカバリを実現
  • 設定可能な省電力モードによってリレーの消費電力を低減(MAX4822/MAX4824)
  • 10MHzのSPI/QSPI/MICROWIRE対応のシリアルインタフェース

DS3231
超高精度I²C内蔵RTC/TCXO/水晶

  • 超高精度RTCによって全計時機能を完全に管理
  • 簡素なシリアルインタフェースによってほとんどのマイクロコントローラと接続可能
  • バッテリバックアップ入力によって継続的な計時を実現

DS2431
1024ビット、1-Wire EEPROM

  • あらゆる個別システムにトレーサビリティおよび関連情報を容易に追加
  • 最小限の1-Wireインタフェースによってコストとインタフェースの複雑さを低減

MAX3393E
±15kV ESD保護、1µA、16Mbps、デュアル/クワッド、低電圧レベルトランスレータ、UCSPパッケージ

  • 保証データレートオプション
  • 双方向レベル変換(MAX3372E/MAX3373E、およびMAX3377E/MAX3378E)
  • 最低+1.2VのVL

MAX889
高周波、安定化、200mA、反転チャージポンプ

  • 出力電流:200mA
  • スイッチング周波数:最大2MHz
  • 小型コンデンサ:1µF