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9. RS - 232 ................................ ................................ ................................ ............................. 30 10.1 RS - 485 ................................ ................................ ................................ ............................. 30 10.2 I2C ................................ ................................ ................................ ................................ .... 30 10.3 SPI ................................ ................................ ................................ ................................ .... 31 10.4 TTL ................................ ................................ ................................ ................................ ... 31 10.5 Ethernet ................................ ................................ ................................ ........................... 31 10.6 RTC ................................ ................................ ................................ ................................ ... 31 10.7 uSD ................................ ................................ ................................ ................................ .. 32 10.8 WiFi & BLE ................................ ................................ ................................ ....................... 33 10.9 10.9.1 General Spe cifications: ................................ ................................ ........................ 33 10.9.2 WiFi & Bluetooth Module Configuration ................................ ............................ 33 I/O technical details: ................................ ................................ ............................. 36 11 Typic al Connections ................................ ................................ .............................. 38 12 Connector details: ................................ ................................ ................................ . 42 13 Mechanical Characteristics ................................ ................................ ................... 42 14

37. Analog Out Turn On: Analog Out Turn - Off: Analog /Digital input Turn - on:

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44. About Industrial Shield s: Direction: Fàbrica del Pont, 1 - 11 Zip/Postal Code: 082 72 City: Sant Fruitós de Bage s (Barcelona) Country: Spain Telephone: ( +34 ) 938 760 191 / (+34) 635 693 611 Mail: industrialshields@industrialshields.com

18. Also there are some examples of programming in File - > Examples - > M - Duino Family. Furthermore there are some extra libr a ries that can be found in Industrial Shields github. https://github.com/IndustrialShields/

3. MDUINO PLC ARDUINO ETHERNET & WIFI & BLE 38AR I/Os ANALOG / DIGITAL RELAY User Guide Revised , May 2019

38. Typical Connections 12

1. MDUINO PLC ARDUINO ETHERNET & WIFI & BLE 38AR I/Os ANALOG / DIGITAL RELAY PLUS Wi - Fi & Bluetooth Controller User Guide:

32. I2C must be enabled in order to communic ate with the RTC. See section 11 I2C to enable it. Using the boards of Industrial Shields, there is a library that simplifies the RTC implementation called RTC. uSD 10.8 The micro SD uses the SPI communication to interact with the Arduino Mega. The SPI protocol is always enabled, as there are no switches that configure it. However, there is a switch that must be placed to ON mode in order to communicate with the uSD: D53(SD): If this Switch is OFF, it enables the Chip Select of the microSD socket and disables Q2.0. If this switch is ON, it enables the Q2.0 output. If the switch is in ON mode the microSD can’t be used. The uSD socket is found in the TOP part of the communication Shields, so in the frontal part of the PLC, it is required to op en the plastic found in the frontal part and the socket is located under the supply of the Arduino. Using the boards of Industrial Shields, there is a library that simplifies the uSD implementation called SD. It is the same as the Arduino library, with the only modification of using the pin 53 to select the Chip Select of the uSD chip. Switch Analog Shield ON OFF SCL/I2.1 I2.1 SCL SDA/I2.0 I2.0 SDA Switch Analog Shield ON OFF D53(SD) Q2.0 D53(SD)

36. I/O technical details: 11 Digital Output Waveform: Digital Out - put Turn - off: PWM Waveform:

12. Mechanical dimension 1.4 M - Duino 2 BLOCK I/Os 2.

7. Warranty and Limitations of Liability Warranty Industrial Shields’s exclusive warranty is that the products are f ree from defects in materials and workmanship for a period of one year (or other period if specified) from date of sale by Industrial Shields. INDUSTRIAL SHIELDS MAKES NO REPRESENTATION OR WARRANTY, EXPRESS ED OR IMPLIED, REGARDING MERCHANABILITY , NON - INFRINGEMENT, OR FITNESS FOR PARTICULAR PURPOSE OF THE PRODUCTS. ANY BUYER OR USER ACKNOWLEDGES THAT THE BUYER OR USER ALONE HAS DETERMINED THAT THE PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR INTENDED USE. INDUSTRIAL SHIELDS DISCLAIMS ALL OT HER WARRANTIES, EXPRESS OR IMPLIED Limitations of Liability INDUSTRIAL SHIELDS SHALL NOT BE RESPONSIBLE FOR SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES, LOSS OF PROFITS OR COMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCTS, WHETHER SUCH CLAIM IS BASED ON CONTRACT, WARRAN T Y, NEGLIGENCE, OR STRICT LIABILITY. IN NO EVENT SHALL INDUSTRIAL SHIELDS BE RESPONISBLE FOR WARRANTY, REPAIR OR OTHER CLAIMS REGARDING THE PRODUCTS UNLESS INDUSTRIAL SHIELDS’S ANALYSIS CONFIRMS THAT THE PRODUCTS WERE PROPERLY HANDLED, S TORED, INSTALLED, AND MAINTAINED AND NOT SUBJECT TO CONTAMINATION, ABUSE, MISUSE, OR INAPPROPIATE MODIFICATION OR REPAIR.

43. - Dimension : - DIN Rail mounting

22. *NOT E: Autoreset. Arduino mega has auto reset when using serial communication code. Set switch to OFF when using serial communication. When uploading code to Arduino Mega set switch to ON . Ethernet Ard uino Power Connector Reset button USB programmer Autoreset connector

29. SPI – MISO/MOSI/SCK 9.4 These pins can only work as a 5V pins if the Ethernet protocol is not going to be used. As the Ethernet protocol uses the SPI to communicate with the Arduino board, both behaviours cannot happen at the same time as the Ethernet would not work. These pins are not stablished with a pull - up or a pull - down configuration. The state of these pins is unknown. If these pins must be used, they require a pull - up or a pull - down configuration. The Ardu ino board allows the pins to be set in a pull - up configuration. If not it must be stablished an external pull - up or pull - down circuit in order to correctly work with these pins. Pin 2/Pin 3 9.5 These pins are only referred to the inputs I0. 0 /I0. 1 . If the swit ch configuration is in OFF position the pins Pin 2/Pin 3 will be available. These pins are not stablished with a pull - up or a pull - down configuration. The state of these pins is unknown. If these pins must be used, they require a pull - up or a pull - down con figuration. The Arduino board allows the pins to be set in a pull - up configuration. If not it must be stablished an external pull - up or pull - down circuit in order to correctly work with these pins.

6. Disclaimers Weights and Dimensions Dimensions and weights are nominal and they are not used for manufacturing purposes, even when tolerances are shown. Performance Data The p erformance data given in this manual is provided as a guide for the user in determining suitability and does not constitute a warranty. It may represent the result of INDUSTRIAL SHIELDS’s test conditions, and the users most correlate it to actual application requirements. Actual performance is subject to the INDUSTRIAL SHIELDS Warranty and Limitations of Liability. Change in Specifications Produ ct specifications and accessories may be changed at any time based on improvements and other reasons. It is our practice to change model numbers when features are changed, or published ratings or when significant construction changes are made . However, some specifications of the products may be changed without any notice. When in doubt, special numbers may be assigned to fix or stablish key specifications for your application on your request. Please consult with your INDUSTRIAL SHIELDS represe ntative at any time to confirm actual specifications of purchased products. Errors and Omissions The information in this document has been carefully checked and is believed to be accurate; however, no responsibility is assumed for clerical, typographical, or proofreading errors, or omissions.

31. Industrial Shields does not provide any library to implement the I2C as it can be used the standard library of Arduino called Wire. SPI 10.4 The M - Duino pins used for the SPI bus are summarized in the table below. For SPI bus MISO, MOSI and CLOCK pins are common to all the connected devices to the M - Duino, conversely, each of the connected devices will have a single and dedicated SS pin. Function M - Duino connection Mega board pin MISO 50 S0 50 MOSI 51 SI 51 CLOCK 52 SCK 52 Reset Reset Reset SS SCL/SDA/RX0/TX0/RX1/TX1/RX3/TX3/Pin2/Pin3 21/20/1/0/19/18/15/14/2/3 Check the s witch configuration at section 8 to enable SS pins. TTL 10.5 M - Duino has one TTL port , RX0/TX0 ( RX1/TX1 is used for Wi - Fi and BLE communication ) . TTL0 is accessed with the function Serial (pins 0 and 1 of the Arduino Mega). Ethernet 10.6 M - Duino Ethernet port controller is based on w5500 IC, which is the compatible IC compatible with Arduino Ethernet2 Shield libraries. All Ethernet shield Arduino librar ies are compatible with the M - Du ino. In the M - Duino, W5500 IC communicates to the Mega board vi a SPI bus (SS Arduino Mega pin 10 ). RTC 10.7 M - Duino RTC Module is based on the DS1307 Chip. This chip works with the I2C protocol communication, so it is required to have enabled the I2C protocol. 4 switches have to be configured in order to enable the RTC features: RTC SCL & RTC SDA must be set to ON mode to enable the I2C wires to the RTC. If they are in OFF mode, the Arduino won’t communicate with the RTC. LEFT ZONE SWITCH ON OFF NC - - NC - - RTC SCL RTC - RTC SDA RTC -

17. 5. Search for “ industrialshields ” on the browse r. 6. Click install (selecting the latest version). Following these steps you will be able to se e now the Industrial Shields Boards: Once it is selected the Ardbox Family or M - Duino family an extra option will appear on Tools: There, it can be selected the exact model for every family. In this case M - Duino 38AR +

8. Table of Contents General Description Wi - Fi & Bluetooth CONTROLLER ................................ ...... 10 1 Zone - Nomenclature ................................ ................................ ................................ ...... 10 1.1 Zone Distribution ................................ ................................ ................................ ............. 11 1.2 A Zone Features ................................ ................................ ................................ ............... 11 1.3 Mechanical dimension ................................ ................................ ................................ .... 12 1.4 General Features ................................ ................................ ................................ ............. 13 1.5 Technical Specifications: ................................ ................................ ........................... 14 2 General Specifications: ................................ ................................ ................................ .... 14 2.1 Pe rformance Specification: ................................ ................................ ............................. 14 2.2 Precautions ................................ ................................ ................................ ................ 15 3 Arduino Board ................................ ................................ ................................ ................. 15 3.1 Intended Audience ................................ ................................ ................................ .......... 15 3.2 General Precautions ................................ ................................ ................................ ........ 15 3.3 Software interface ................................ ................................ ................................ ..... 15 4 How to connect PLC Arduino to PC ................................ ................................ ........... 19 5 How to connect PLC to power supply ................................ ................................ ....... 20 6 M - duino Family Pinout ................................ ................................ .............................. 21 7 A Zone connection ................................ ................................ ................................ .......... 21 7.1 B Zone (Analog Shield) ................................ ................................ ................................ .... 23 7.2 C Zone (Relay Shield) ................................ ................................ ................................ ....... 24 7.3 Switch Configuration ................................ ................................ ................................ . 25 8 A Zone: Communications ................................ ................................ ................................ 25 8.1 Re lay Shield ................................ ................................ ........ ¡Error! Marcador no definido. 8.2 I/Os 5V pins ................................ ................................ ................................ ............... 27 9 I2C pins – SDA/SCL ................................ ................................ ................................ .......... 28 9.1 Serial 0 – RX0/TX0 ................................ ................................ ................................ ........... 28 9.2 Serial 1 – RX1/TX1 ................................ ................................ ................................ ........... 28 9.3 SPI – MISO/MOSI/SCK ................................ ................................ ................................ ..... 29 9.4 Pin 2/Pin 3 ................................ ................................ ................................ ....................... 29 9.5 A Zone Features: Communications & RTC & uSD ................................ .................. 30 10

34. Now you are able to install the board. Go to Tools > Boards > Boards Manager and search by ESP32. Will appear the esp32 by Espressif Systems. Install it. Once it is installed go to Tools > Boards and choose ESP32 Dev Module

5. Application Considerations and Warranty Read and Understand this Manual Please read and understand this manual before using the product . Please consult your comments or questions to Industrial Shields before using the product. Application Consideration THE PRODUCTS CONTAINED IN THIS DOCUMENT ARE NOT SAFETY RATED. THEY SHOULD NOT BE RELIED UPON AS A SAFETY COMPONENT OR PROTECTIVE DEVICE FOR ENSURING SAFETY OF PERSONS, AS THEY ARE NOT RATED OR DESSIGN ED FOR SUCH PURPOSES. Please know and observe all prohibitions of use applicable to the products. FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR PROPERTY WITHOUT ENSURING THAT THE SYSTEM AS A WHOLE HAS BEEN DESSIGNED TO ADDRESS THE RISKS , NEVER USE THE INDUSTRIAL SHIELDS PRODUCTS . NEVER USE THE INDUSTRIAL SHIELDS PRODUCT S BEFORE THEY ARE PROPERLY RATED AND INSTALLED FOR THE INTENDED USE WITHIN THE OVERALL EQUIPMENT OR SYSTEM. Industrial Shields shall not be responsible for conformity with any code s, regulations or standards that apply to the combination of products in the customer’s application or use of the product. The following are some examples of applications for which particular attention must be given. This is not intended to be an exhausti ve list of all possible uses of the products, nor is it intended to imply that the uses may be suitable for the products:  Systems, machines, and equipment that could present a risk to life or property.  Nuclear energy control systems, combustion systems, ra ilroad systems, aviation systems, medical equipment, amusement machine s , vehicles, safety equipment, and installation subject to separate industry or government regulations.  Outdoor use, uses involving potential chemical contamination or electrical interfe rence, or conditions or uses not described in this document. At the customer’s request, INDUSTRIAL SHIELDS will provide applicable third party certification documents identifying ratings and limitations of use that apply to the products. This information by itself is not sufficient for a complete determination of the suitability of the products in combination with the system, machine, end product, or other application or use.

16. Steps: 1. Open Arduino IDE and g o to: “ File - > Preferen ces ” located in the top left corner. 2. In Additional Boards Manager URLs write the following: http://apps.industrialshields.com/main/arduino/boards/package_industrialshields_index.json 3. Press OK to save the changes. 4. Go to: Tools - > Board: ... - > Boards Manager

10. General Description Wi - Fi & Bluetooth CONTROLLER 1 Zone - Nomenclature 1.1 The nomenclature shown in this point will be used in the whole User Guide , so it is important to understand this nomenclature. The nomenclature to differentiate the zones is based on the Alphabet, being A the shield from below and B the shield from above.  The inputs in the zone B are named I0.X, being X any number suitable in the Shield. Digital Outputs are named as Q0.X and Analog Outputs as A0.X.  The inputs in the zone C are named I1.X, being X any number suitable in the Shield. R elays as R1.X A ZONE B ZONE C ZONE C ZONE B ZONE A ZONE C ZONE B ZONE A ZONE

15. P recautions 3 Read this manual before attempting to use the WiFi & BLE PLC and follow its descriptions for reference during operation. Arduino Board 3.1 The MDUINO PLC ARDUINO ETHERNET & WIFI & BLE 38 AR I/Os ANALOG/DIGITAL PLUS i ncludes an Arduino Mega Board as controller and a ESP32 Dev programmable chip as a Wi - Fi & BLE gateway . I ntended Audience 3.2 This manual is intended for technicians, which must have knowledge on electrical systems. General Precautions 3.3 The user must operate M - Duino according to the performance specifications described in this manual. Before using the MDUINO PLC ARDUINO ETHERNET & WIFI & BLE 38AR I/Os ANALOG / DIGITAL PLUS under different conditions from what has been specified in this manual or integrating in to nuclear control syste ms, railroad systems, aviation systems, vehicles, combustion systems, medical equipment, amusement machines, safety equipment and other systems, machines, and equipment that may have a serious influence on lives and property if used improperly, consult you r INDUSTRIAL SHIELDS representative. Ensure that the rating and performance characteristics of the Ethernet/WiFi/BLE Controller are sufficient for the systems, machines, and equipment, and be sure to provide the systems, machines, and equipment double safety mechanisms. This manual provides information for programming and operating the MDUINO PLC ARDUINO ETHERNET & WIFI & BLE 38AR I/Os ANALOG / DIGITAL PLUS . Software interface 4 Industrial Shields PLC are programmed using Arduino IDE, which is a software based on the C language. They can also be programmed using directly C but it is much easier working with Arduino IDE as it provides lots of libraries that helps in the programming. Industrial Shields provides boards for programming the PLCs much easier. Basically it is no needed to define the pins and if that pins are inputs or outputs. Everything is set up automa tically if using the boards. In order to install Industrial Shields boards, these are the steps that must be followed. Requirements: Arduino IDE 1.8.0 or above (better to have always the latest version).

19. How to connect PLC Arduino to PC 5 - Connect USB port from PLC to PC. NOTE: M - Duino Family use s USB - B cable. - Open Arduino IDE interface: - Select Industrial Shields boa rd s - > M - Duino Family - Select the correct M - Duino Board : M - Duino 38AR + - Select correct port.

30. A Zone Features: Communications & RTC & uSD 10 RS - 232 10.1 The Arduino Mega function code to access the RS - 232 port in the M - Duino is Serial2 (pins 16 and 17 of the Arduino Mega). For the RS - 232 communication protocol there isn’t any switch that affects it. So it does not matter the configuration of the sw itches to implement a RS - 232 communication. Using the boards of Industrial Shields, there is a library that simplifies the RS - 232 implementation. RS - 485 10.2 For RS485 communication protocol the defined Arduino Mega pins are showed in the chart below. Functi on Arduino Pin DI 14 RO 15 RE 11 DE 46 For the RS - 485 communication protocol there is only one switch that affects in this communication. The RS - 485 protocol will be always enabled, the only switch that affects is the one called “FD rs - 485 HD” (See Section 8) . This switch makes the choosing between RS - 485 Half Duplex or RS - 485 Full Duplex (RS - 422). Using the boards of Industrial Shields, there is a library that simpli fies the RS - 485 implementation. I2C 10.3 I2C communication DOES NOT REQUIRE a pull - up re sistor for the M - Duino Family . The pull - up resistor is already implemented in the PCB. I2C communication is configured by switches, so the switches must be configured in order to enable the I2C communication. To enable I2C the switches SCL/I2.6(I2.1) & SDA/I2.5(I2.0) must be set to OFF mode. In this mode the inputs are totally disabled and the I2C is now enabled.

20. H ow to connect PLC to power supply 6 - M - Duino Family PLCs are 12 - 24Vdc supplied. IMPORTANT: The polarity IS NOT REVERSAL! - Make sure that the live and GND connector of the power supply match the PLC. - Make sure that the power supply mains output is not higher than 24Vdc. - Suggested power suppliers * Not recommended for industrial applications . The Jack connector needs to be removed and use the live and GND connectors.

25. Switch Configuration 8 A Zone: Communication s 8.1 4. SCL/I2.6: ALWAYS AT OFF POSITION. On the MDUINO PLC ARDUINO ETHERNET & WIFI & BLE 38AR I/Os ANALOG/DIGITAL PLUS Controller this switch is not connected . 3. SDA/I2.5: ALWAYS AT OFF POSITION. On the MDUINO PLC ARDUINO ETHERNET & WIFI & BLE 38AR I/Os ANALOG/DIGITAL PLUS Controller this switch is not connected . 2. RX1/I1.1: Choosing between RX1 or the input I1.1. If this switch is ON, it enables the I1.1 input and disables the RX1. If this switch is OFF, it enables RX1 and disables I1.1. 1. TX1/I1.0: Choosing between TX1 or the input I1.0. If this switch is ON, it enables the I1.0 input and disables the TX1. If this switch is OFF, it enables TX1 and disables I1.0. LEFT ZONE Switch Relay Shield ON OFF C ZONE RX1/I1.1 I1.1 RX1 TX1/I1.0 I1.0 TX1 B ZONE Pin 3/I0.6 I0.6 Pin 3 Pin 2/I0.5 I0.5 Pin 2 uSD & RS - 485 D53(SD) - SD FD RS - 485 HD HD FD

35. The internal connections between the ESP32 module and the Arduino Mega are the following: Arduino Mega Pinout ESP32 Pinout 5Vdc Vcc GND GND Tx1 (Pin 18) TxD Rx1 (Pin19) RxD WiFi and Bluetooth are always enabled as there are no switches that configure it. The WiFi and Bluetooth module uses Serial1 for communication . More information: https://www.industrialshields.com/blog/industrial - sh ields - blog - 1/post/wifi - bluetooth - module - esp32 - devkit - v1 - 133

26. 4. Pin 3/I0.6 : Choosing between Pin 3 or the input I0.6. If this switch is ON, it enables the I0.6 input and disables the Pin 3. If this switch is OFF, it enables Pin 3 and disables I0.6. 3. Pin 2/I0.5: Choosing between Pin 2 or the input I0.5. If this switch is ON, it enables the I0.5 input and disables the Pin 2. If this switch is OFF, it enables Pin 3 and disables I0.5. 2. D53(SD): ALWAYS AT OFF POSITION. On a MDUINO PLC ARDUINO ETHERNET & WIFI & BLE 38AR I/Os ANALOG/DIGITAL PLUS Controller this switch is not connected . It allows the uSD storage. 1. FD RS - 485 HD: Choosing between FD or HF. If this switch is ON, it enables the Half Duplex (HD) option and disables the FD. If this switch is OFF, it enables Full Duplex (FD) and disables HD . 1. RTC SDA: This switch enables the communication to communicate with the RTC using I2C. Having this switch in ON mode it actives this communication, whereas if it is in OFF mode it disables the I2C to reach the RTC. 2. RTC SCL: This switch enables the communication to communicate with the RTC using I2C. Having this switch in ON mode it actives this communication, whereas if it is in OFF mode it disables the I2C to reach the RTC. 3. NC: Not connected. T his switch is not connected to anything, it doesn’t matter if it is in ON mode or OFF mode. 4. NC: Not connected. This switch is not connected to anything, it doesn’t matter if it is in ON mode or OFF mode. LEFT ZONE SWITCH ON OFF NC - - NC - - RTC SCL RTC - RTC SDA RTC -

33. WiFi & BLE 10.9 The WiFi and Bluetooth integrated module consists in a single 2.4 GHz Wi - Fi and Bluetooth combo chip designed with the TSMC ultra - low - power 40 nm technology. It is designed to achieve the best power and RF performance, showing robustness, versatility and reliability in a wide variety of applications and power scenarios. Some a pplications are Generic Low - power IoT Sensor Hub, Generic Low - power IoT Data Loggers and Mesh Network. It is designed for Internet - of - Things (IoT) applications. 10.9.1 General Specifications : Wi - Fi  802.11 b/g/n  802.11 n (2.4 GHz), up to 150 Mbps Bluetooth  Bluetooth 4.2 BR/EDR BLE dual mode controller  +12 dBm transmitting power  NZIF receiver with - 97 dBm BLE sensitivity 10.9.2 WiFi & Bluetooth Module Configuration In order to configure the WiFi & BLE module, you must connect it to a PC. To connect it you will need a micro USB to USB cable. The slot for the micro USB input is located on the right side of your equipment. To load the program into the ESP32 you have to install the board on the Arduino IDE software . Go to File > Preferences and into Additional Boards Manager URLs add the next URL : https://dl.espressif.com/dl/package_esp32_index.json *If you already have one URL put it next to the other separeted by coma, like in the image below .

4. Preface This User Guide is been implemented by Boot & Work, S.L. working under the name Industrial Shields. Purpose of the manual The information contained in this manual can be used as a reference to operating, to functions, and to the technical data of the signal modules, power supply modules and interface modules. Intended Audience This User Guide is intended for the following audience:  Persons in charge of introducing automatio n devices.  Persons who design automation systems.  Persons who install or connect automation devices.  Persons who manage working automation installation. Warnings:  Unused pins should not be connected. Ignoring the directive may damage the controller .  Improper use of this product may severely damage the controller.  Refer to the controller’s User Guide regarding wiring considerations.  Before using this product, it is the responsibility of the user to read the product’s User Guide and all accompanying d ocumentation.

28. * IMPORTANT: Do not connect the terminals in the chart above to voltages higher than 5V. These terminals provide direct access to the Mega board. A part from the switch configuration there are some special conditions depending on these 5V. Now it is going to be shown the considerations to operate with these pins. I2C pins – SDA/SCL 9.1 The I2C protocol is meant to work in a pull - up configuration. A pull - up configuration means that when the pin is at rest (nothing connected to it) it always reads a HIGH value. In this case it reads 5V when nothing is connected. The pull - up configuration is stablished by default in these pins. If it is meant to work them as a GPIO at 5V, it has to be considered that they are pull - up inputs. *IMPORTANT: I2.5 & I2.6 are not pull - up inputs alth ough they are referred to the I2C pins (switch configuration). There is a “reverse pull - up circuit “ that is stablished in order to have the same behaviour as the other inputs. Serial 0 – RX0/TX0 9.2 The Serial0 protocol can work also as a 5V pin. These pins s hould be used ultimately, only in case that all the 5V pins are already performing a function. This is because they are shared with the USB interface. If using these pins, the USB communication cannot be working at the same time. When the PLC is not instal led, the USB communication is normally required for debugging, uploading and intercommunicating with the Ethernet controller . If using both interfaces at the same time the Arduino board will get blocked. These pins are not stablished with a pull - up or a pull - down configuration. The state of these pins is unknown. If these pins must be used, they require a pull - up or a pull - down configuration. The Arduino board allows the pins to be set in a pull - up configuration. If not it must be sta blished an external pull - up or pull - down circuit in order to correctly work with these pins. Serial 1 – RX1/TX1 9.3 In the WiFi & BLE Controller, Serial 1 is used to communicate through the ESP32 integrated in the MDUINO PLC ARDUINO ETHERNET & WIFI & BLE 38AR I/Os ANALOG/DIGITAL PLUS . DON’T USE SERIAL 1 SCK 52 Pin 3 3 Communication s witc h: OFF Pin 2 2 Communication switch: OFF

11. Zone Distribution 1.2 A Zone Features 1.3 Shield A Zone Communication Shield (1x) Ethernet (1x) USB (1x) I2C (3x) TTL (1x) RS - 232 (1x) HALF/FULL Duplex RS - 485 (1x) SPI external Port (1x) RTC (1x) uSD Socket (1x) WiFi & BLE

27. Analog / Relay Switches 8.2 For the Relay Shield if a switch is set to ON, it can only act as Digital Output. If it is set to OFF it can only act as an Analog Output. If it is desired to use a Digital Output the pin must be set to ON and the pin that will provide this digital output is represented with Q0.X, being X any number of the tables above. If it is desired to use an Analog Output t he pin must be set to OFF and the pin that will provide this analog output is represented with A0.X, being X any number of the tables above. I/Os 5V pins 9 The MDUINO PLC ARDUINO ETHERNET & WIFI & BLE 38AR I/Os ANALOG/DIGITAL PLUS has some of the Mega board pins available. Th ese pins can be programmed according to Arduino features such as I/Os operating at 5V or any additional features present in the pins (for example I2C communication in pins SCL and SDA). As this pins are directly connected to the Arduino Mega board they are not as well protect as the normal inputs. These pins are mainly meant to be used as prototyping. The Arduino board available pins are summarized in the table below. In or der to access some of these pins the configuration switch must be set to OFF position (see section 8 ) and some extra considerations must be taken in consideration when using these pins . C ZONE SWITCH ON OFF NC - - Q1.2 Q1.2 A1.2 Q1.1 Q1.1 A1.1 Q1.0 Q1.0 A1.0 B ZONE SWITCH ON OFF NC - - Q0.7 Q0.7 A0.7 Q0.6 Q0.6 A0.6 Q0.5 Q0.5 A0.5 M - Duino terminal Arduino pin Enable Arduino pin SCL 21 Communication switch: OFF SDA 20 Communication switch OFF RX0 0 TX0 1 RX1 19 DON’T USE! TX1 18 DON’T USE! MISO 50 MOSI 51

42. Connector details: 13 The connector inside the PLCs that mounts on the PCB is MC 0,5/10 - G - 2,5 THT – 1963502 from Phoenix contact. MC0,5/10 - G - 2,5THT For I/O and power supply there is a FK - MC 0,5/10 - ST - 2,5 - 1881406 connector from Phoenix contact . FK - MC 0,5/10 - ST - 2,5 Connection details: Mech 14 anical Characteristics Article reference MC 0,5/10 - G - 2,5 THT Height 8,1mm Pitch 2,5mm Dimension 22,5mm Pin dimensions 0,8x0,8mm Pin spacing 2,50mm Article reference FK - MC 0,5/10 - ST - 2,5 Rigid conduit section min. 0,14 mm² Rigid conduit section max. 0,5 mm² Flexible conduit section min. 0,14 mm² Flexible conduit section max. 0,5 mm² Conduit section AWG/kcmil min. 26 Conduit section AWG/kcmil max. 20

14. T echnical Specifications: 2 General Specifications: 2.1 Item M - DUINO B ZONE Power supply voltage DC power supply 12 to 24Vdc Operating voltage range DC power supply 11 .4 to 25.4Vdc Power consumption DC power supply 30VAC max. External power supply Power supply voltage 24Vdc Power supply output capacity 700 Ma Insulation resistance 20MΩ min.at 500Vdc between the AC terminals and the protective earth terminal. Dielectric strength 2.300 VAC at 50/60 Hz for one minute with a leakage current of 10mA max. Between all the external AC te rminals and the protective ground terminal. Shock resistance 80m/s 2 in the X, Y and Z direction 2 times each. Ambient temperature (operating) 0º to 45ºC Ambient humidity (operating) 10% to 90% (no condensation) Ambient environment (operating) With no corrosive gas Ambient temperature (storage) - 20º to 60ºC Power supply holding time 2ms min. Weight 55 2 g max. Performance Specification: 2.2 Arduino Board ARDUINO MEGA 2560 Control method Stored program method I/O control method Combination of the cyclic scan and immediate refresh processing methods. Programming language Arduino IDE. Based on wiring (Wiring is an Open Source electronics platform composed of a programming language. “similar to the C”. http://arduino.cc/en/Tutorial/HomePage Microcontroller ATmega2560 Flash Memory 256K B of which 8 K B are used by the bootloader Program capacity (SRAM) 8K B EEPROM 4K B Clock Speed 16MHz Clock Speed 16MHz

24. C Zone (Relay Shield) 7.3 See section 8 to select suitable switch configuration for enable these connections. C Zone M - Duino Connector Arduino Pin Function R1.8 R1.7 R1.6 R1.5 R1.4 A1.2 1 A1.1 1 A1.0 1 GND Q1.2 1 Q1.1 1 Q1.0 1 GNDCOM 24VCOM 42 43 44 45 29 11 10 8 GND 11 10 8 - - Relay Out Relay Out Relay Out Relay Out Relay Out Analog Out Analog Out Analog Out GND Digital/PWM Out Digital/PWM Out Digital/PWM Out External Isolated Out GND External Isolated Out Vdc C Zone M - Duino Connector Arduino Pin Function R0.3 R0.2 R0.1 GND I0.5 I0.4 I0.3 I0.2 I0.1 1 ( - )I0.1 I0.0 1 ( - )I0.0 30 27 28 GND 63 62 61 60 19 - 18 - Relay Out Relay Out Relay Out GND Analog/Digital Input Analog/Digital Input Analog/Digital Input Analog/Digital Input Interrupt 1 In GND I0.1 Interrupt 0 In GND I0.0 Relay Outputs Analog Output (Switch Configuration) Digital/PWM Outputs (isolated) . RELAY Outputs Analog/Digital Inputs Interrupt Inputs (isolated) Configuration Switch* (see section 8 to select correct configuration for outputs). Top Zone Led indicator I/Os state

13. General Features 1.5 CONECTABLE PLC ARDUINO 24Vcc M - DUINO MODEL TYPE WiFi & BLE Controller General Spec. Input Voltage 12 to 24Vdc Fuse protection (2.5A) Polarity protection I max. 1. 5A Size 101x119.5x70.1 101x119.5x119.3 Clock Speed 16MHz Flash Memory 256 KB of which 8 KB used by bootl o ader SRAM 8 KB EEPROM 4 KB Communications I2C – Ethernet Port – USB – WiFi &BLE – RS485 – RS232 -- SPI – (1 x) Rx, Tx (Arduino pins) Max232 - Max485 - W5500 - ESP32 USB consideration! Only meant for uploading or debugging, not always connected as a serial in a project! Cannot be working in a final application An/Dig Input 10bit (0 - 10Vcc) 0 to 10V Input Impedance: 39K Separated PCB ground Digital Isolated Input (24Vcc) 7 to 24Vdc I min: 2 to 12 mA Galvanic Isolation * Interrupt isolated Input HS (24Vcc) 7 to 24Vdc I min: 2 to 12 mA Galvanic Isolation Analog Output 8bit (0 - 10Vcc) 0 to 10Vdc I max: 20 mA Separated PCB ground Digital Isolated Output (24Vcc) 5 to 24 Vdc I max: 70 mA Galvanic Isolation Diode Protected for Relay Imax 24Vdc: 410 mA PWM Isolated Output 8bit (24Vcc) 5 to 24 Vdc I max: 70 mA Galvanic Isolation Diode Protected for Relay Relay Output I max: 5A V max: 24VDC / 230VAC Expandability I2C - 127 elements - Serial Port RS232/RS485 /WiFi/BLE * By using this type of signal can no lon ger use Digital signal (24Vdc)

21. M - duino Family Pinout 7 A Zone connection 7.1 SS: Chip Select pins. These pins can act as TTL, so they can work for the Chip Select pin of any device. Base (common unit) A Zone M - Duino Connector Arduino Pin Function SCL SDA RX0 TX0 NC NC T X R X Z - Y+ B - A+ PIN3 50 SO 51 SI 52 SCK Reset Vin5 PIN2 GND GND 24Vdc 21 20 1 0 - - 16 17 - - - - 3 50 51 52 Reset Vin5 2 - - I2C/SS I2C/SS RX0/SS TX0/SS Not Connected Not Connected RX2 (serial 2) TX2 (serial 2) RS485 RS485 RS485 RS485 Arduino Pin SPI SPI SPI SPI 5V Arduino Pin Gnd Gnd Power Supply Base (common unit) A Zone M - Duino Connector Arduino Pin Function AREF IOREF2 IOREF1 7Vdc GND 3.3Vdc GND 5Vdc GND AREF IOREF2 IOREF1 7Vdc GND 3.3Vdc GND 5Vdc GND Arduino PIN Arduino PIN Arduino PIN - GND Arduino PIN GND - GND Configuration Switch* (see section 8 for configuring the communications . E nabling communications disables some I/Os) Communication Pins Power supply connectors (24Vdc – GND )

23. B Zone (Analog Shield) 7.2 1 See section 8 to select suitable switch configuration for enable these connections. B Zone M - Duino Connector Arduino Pin Function I0.12 I0.11 I0.10 I0.9 I0.8 I0.7 ( - ) I0.6 /INT1 I0.6 /INT1 1 ( - ) I0.5 /INT0 I0.5 /INT0 1 ( - ) I0.4 I0.4 ( - ) I0.3 I0.3 ( - ) I0.2 I0.2 ( - ) I0.1 I0.1 ( - ) I0.0 I0.0 59 58 57 56 55 54 - 3 - 2 - 26 - 25 - 24 - 23 - 22 Analog/ Digital In Analog/ Digital In Analog/ Digital In Analog/ Digital In Analog/ Digital In Analog/ Digital In GND I0.6 Interrupt 1 In GND I0.5 Interrupt 0 In GND I0.4 Digital Input GND I0.3 Digital Input GND I0.2 Digital Input GND I0.1 Digital Input GND I0.0 Digital Input B Zone M - Duino Connector Arduino Pin Function GND A0.7 1 A0.6 1 A0.5 1 Q/Vdc COM ( - ) Q0.7 1 Q0.6 1 Q0.5 1 Q0.4 Q0.3 Q0.2 Q0.1 Q0.0 GND 6 5 4 - - 6 5 4 40 39 38 37 36 GND Analog Out Analog Out Analog Out External Isolated Out Vdc External Isolated Out GND Digital /PWM Out Digital /PWM Out Digital /PWM Out Digital Out Digital Out Digital Out Digital Out Digital Out Led indicator I/Os state Analog/Digital Inputs Interrupt Inputs (isolated) Digital Inputs (isolated) Configuration Switch* (see section 8 to select the correct configuration for outputs). Analog Outputs Voltage Supply/Reference for Digital/PWM Outputs (isolated) PWM/Digital Outputs Top Zone

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