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36. Typical Connections

38.

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

37.

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

1. GPRS / GSM CONTROLLER 21 I/Os PLUS GPRS/GSM Controller User Guide:

3. GPRS/GSM Contro ller User Guide Revised , May 2019

17. In this case, the GPRS/GSM Controller uses the MDuino 21+ model, as you can see in th e following image: 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/

28. Pin 2 REME MBER THAT PIN 2 IS USED BY THE SIM800L MODULE AS RESET PIN , SO IS NOT AVAILABLE IN THE GPRS/GSM CONTROLLER ! IF YOU WANT TO USE SERIAL1, YOU MUST SET THE PIN2 ALWAYS AT HIGH POSITION.

16. 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 Shi elds 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.

41. Mech anical Characteristics - Dimension GPRS/GSM Controll er : - DIN Rail mounting

11. Zone Distribution A Zone Features Shield A Zone Communi cation 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) GPRS/GSM Mechanical dimension 2.

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 INDUSTRIA L 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 Product 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 representative at any time to confirm actual specifica tions 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.

19. H ow to connect PLC to power supply - 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 supp ly 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 GN D connectors.

15. Steps: 1. Open Arduino IDE and g o to: “ File - > Preferences ” 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.js on 3. Press OK to save the changes. 4. Go to: Tools - > Board: ... - > Boards Manager

7. War ranty and Limitations of Liability Warranty Industrial Shields’s exclusive warranty is that the products are free from defects in materials and workmanship for a period of one year (or other period if specified) from date of sale by Industrial Shields. IND USTRIAL 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 PR ODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR INTENDED USE. INDUSTRIAL SHIELDS DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED Limitations of Liability INDUSTRIAL SHIELDS SHALL NOT BE RESPONSIBLE FOR SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES, L OSS 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, STORED, INSTALLED, AND MAINTAINED AND NOT SUBJECT TO CONTAMINATION, ABUSE, MISUSE, OR INAPPROPIATE MODIFICATION OR REPAIR.

33. Arduino Mega Pinout Sim800L Pinout 5Vdc Vcc GND GND Tx1 (Pin 18) TxD Rx1 (Pin19) RxD Pin 2 RST How to defin e it in a sketch: #define FONA_RX 19 //RX1 on Arduino Mega #define FONA_TX 18 //TX1 on Arduino Mega #define FONA_RST 2 The GPRS/GSM protocol is always enabled as there are no switches that configure it. the GPRS / GSM protocol uses the Serial1 of the e quipment to be able to communicate and the pin2 for the module reset. If you want to use Serial1, you must indicate in the program that pin2 is always in High position. In case of using the Serial1, the GPRS / GSM communication can not be used.

32. Using the boards of Industrial Shields, there is a lib rary 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. GPRS/GSM The SIM800L module is the integrated module for the use of GP RS / GSM in this PLC and to program it you must download this library on your Arduino IDE . You can test the GPRS / GSM functionality using the examples that come with the library: When defining th e pins in the program, take into account that the internal connections between the Sim800l module and the Arduino Mega are the following: LEFT ZONE Switch Analog Shield Relay Shield ON OFF ON OFF uSD D53(SD) Q2.0 D53(SD) - D53(SD)

21. *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

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 automation devices.  Pers ons 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 documentation.

42. 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

10. General Description GPRS / GSM CONTROLLER 21 PLUS Zone - Nomenclature 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 D the shield from above. Having a B and a C in the middle of them. It has 2 zone s (A, B):  The inputs in the zone B are named I0.X, being X any number suitable in the Shield. Outputs are named as Q0.X and relays as R0.X A ZONE B ZONE B ZONE A ZONE B ZONE A ZONE

14. P recautions Read this manual before attempting to use the GPRS/GSM 21 PLUS PLC and follow its descriptions for reference during operation. Arduino Board The GPRS/GSM Controller include s an Arduino Mega Board as controller. I ntended Audience This manual is intended for technicians, which must have knowledge on electrical systems. General Precautions The user must operate M - Duino according to the performance specifications described in this manual. Before using the GPRS/GSM Controller under different conditions from what has been specified in this manual or integrating GPRS/GSM Controller to nuclear control systems, railroad systems, aviation systems, vehicles, combustion systems, medical equipment, amusement ma chines, safety equipment and other systems, machines, and equipment that may have a serious influence on lives and property if used improperly, consult your INDUSTRIAL SHIELDS representative. Ensure that the rating and performance characteristics of GPRS/G SM 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 GPRS/GSM 21 PLUS Controller . S oftware interface 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 automatically 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).

18. How to connect PLC Arduino to PC - 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 - D uino Board (M - Duino 21+ ) . - Select correct port.

25. Analog Shi eld s For the Analog 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 the 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. GPRS/GPS I/Os 5V pins The GPRS/GSM Controller has some of the Mega board pins available. Th ese pins can be programmed according to Arduin o 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. The se 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 . B ZONE SWITCH ON OFF NC - - Q0.7 Q0.7 A0.7 Q0.6 Q0.6 A0.6 Q0.5 Q0.5 A0.5

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 DESSIGNED FOR SUCH PURPOSES. Plea se 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 PRO DUCTS . 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 codes, 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 exhaustive list of all possible use s 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, railroad systems, aviation sy stems, 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 interference, or conditions or use s 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.

29. A Zone Features: Communications & RTC & uSD RS - 232 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 switches to implement a R S - 232 communication. Using the boards of Industrial Shields, there is a library that simplifies the RS - 232 implementation. RS - 485 For RS485 communication protocol the defined Arduino Mega pins are showed in the chart below. Function 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 simplifies the RS - 485 implementation. I2C I2C communication DOES NOT REQUIRE a pull - up resistor 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.

27. Serial 1 – RX1/TX1 In the GPRS/GSM Controller, Serial 1 is used to communicate through the Sim800L integrated GPRS/GSM Module. If you want to use Serial 1 instead of GPRS/GSM, you must set the Pin 2 (Pin used as the GPRS/GSM ) always at high position . Remember: if you use the Serial1 in your program, you will not be able to use the GPRS / GSM functionalities ! Thes e 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 configurati on. If not it must be stablished an external pull - up or pull - down circuit in order to correctly work with these pins. SPI – MISO/MOSI/SCK 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 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. Pin 3 T his pin is only referred to the inputs I0.1 . If the switch configuration is in OFF position the pin 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 b e 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 stablished an external pull - up or pull - down circuit in order to correctly work with these pins.

40. Connector details: 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: 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

31. Ethernet M - Duino Ethernet port controller is based on w5500 IC, which is the compatible IC compatible with Arduino Ether net2 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 M - Duino RTC Module is based on the DS1307 Chip. This chip work s 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 mus t 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. I2C must be enabled i n 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 The micro SD uses the SPI communication to interact with the Arduino Meg a. 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 soc ket 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 open the plastic found in the frontal part and the socket is located under the supply of the Arduino. LEFT ZONE SWITCH ON OFF NC - - NC - - RTC SCL RTC - RTC SDA RTC - Switch Analog Shield Relay Shield ON OFF ON OFF SCL/I2.6 I2.6 SCL I2.1 SCL SDA/I2.5 I2.5 SDA I2.0 SDA

9. RS - 232 ................................ ................................ ................................ ............................. 29 RS - 485 ................................ ................................ ................................ ............................. 29 I2C ................................ ................................ ................................ ................................ .... 29 SPI ................................ ................................ ................................ ................................ .... 30 TTL ................................ ................................ ................................ ................................ ... 30 Ethernet ................................ ................................ ................................ ........................... 31 RTC ................................ ................................ ................................ ................................ ... 31 uSD ................................ ................................ ................................ ................................ .. 31 GPRS/GSM ................................ ................................ ................................ ....................... 32 I/O technical details: ................................ ................................ ............................. 34 Typical Connections ................................ ................................ .............................. 36 Connector details: ................................ ................................ ................................ . 40 Mechanical Characteristics ................................ ................................ ................... 41

26. * 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 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 t hey are pull - up inputs. *IMPORTANT: I2.5 & I2.6 are not pull - up inputs although 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. Seri al 0 – RX0/TX0 The Serial0 protocol can work also as a 5V pin. These pins should 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 c ommunication cannot be working at the same time. When the PLC is not installed, 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 b oard 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 stablished an external pull - up or pull - down circuit in order to correctly work with these pins. M - Duino terminal Arduino pin Enable Arduino pin SCL 21 Communication switch: OFF SDA 20 Communication switch OFF RX0 0 TX0 1 RX1 19 Communication switch: OFF TX1 18 Communication switch: OFF M ISO 50 MOSI 51 SCK 52 Pin 3 3 Communication s witc h: OFF

13. T echnical Specifications: General Specifications: 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 con sumption 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 46 5g max. Performance Specification: 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 pro gramming 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 EEPR OM 4K B Clock Speed 16MHz Clock Speed 16MHz

30. 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. Industrial Shields does not provide any library to implement the I2C as it can be used the standard library of Arduino called Wire. SPI 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 M - Duino has two TTL ports, RX0/TX0, RX1/TX1 . TTL0 is accessed with the function Serial (pins 0 and 1 of the Arduino Mega). TTL1 is accessed with the function Serial1 (pins 18 a nd 19 of the Arduino Mega). In order to use the TTL pins the configuration of the switches have to be the following one: If the switches RX1/I1.6(I1.1) & TX1/I1.5(I1.0) are in OFF mode, the RX1/TX1 will be enabled. In order to use TTL3 these switches must be in OFF mode. Switch Analog Shield Relay Shield ON OFF ON OFF D ZONE SCL/I2.6 I2.6 SCL I2.1 SCL SDA/I2.5 I2.5 SDA I2.0 SDA Switch Analog Shield Relay Shield ON OFF ON OFF C ZONE RX1/I1.6 I1.6 RX1 I1.1 RX1 TX1/I1.5 I1.5 TX1 I1.0 TX1

23. Switch Configuration A Zone: Communication s 4. SCL/I2.6: ALWAYS AT OFF POSITION. On a GPRS/GSM Controller this switch is not connected . 3. SDA/I2.5: ALWAYS AT OFF POSITION. On a GPRS/GSM Controller this switch is not connected . 2. RX1/I1.6: ALWAYS AT OFF POSITION. On a GPRS/GSM Controller this switch is not connected . 1. TX1/I1.5: ALWAYS AT OFF POSITION. On a GPRS/GSM Controller this switch is not connected . LEFT ZONE Switch Analog Shield ON OFF B ZONE Pin 3/I0.6 I0.1 Pin 3 Not Connected NC NC uSD & RS - 485 D53(SD) - SD FD RS - 485 HD HD FD

12. General Features CONECTABLE PLC ARDUINO 24Vcc M - DUINO MODEL TYPE GPRS /GSM 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 Commu nications I2C – Ethernet Port – USB – GPRS – RS485 – RS232 -- SPI – (2 x) Rx, Tx (Arduino pins) Max232 - Max485 - W5500 - Sim800L 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 Galva nic 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 Digital Isolated Output Relay 220V Vac I max: 5A Galvanic Isolation Diode protected for Relay PWM Isolated Output 8bit (24Vcc) 5 to 24 Vdc I max: 70 mA Galvanic Isolation Diode Protected for Relay Expandability I2C - 127 elements - Serial Port RS232/RS485 /GPRS * By using this type of s ignal can no lon ger use Digital signal (24Vdc)

20. M - duino Family Pinout A Zone connection 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 RX1 * TX1 * T X R X Z - Y+ B - A+ PIN3 50 SO 51 SI 52 SCK Reset Vin5 NC GND GND 24Vdc 21 20 1 0 19 18 16 17 - - - - 3 50 51 52 Reset Vin5 NC - - I2C/SS I2C/SS RX0/SS TX0/SS RX1 /SS TX1 /SS RX2 (serial 2) TX2 (serial 2) RS485 RS485 RS485 RS485 Arduino Pin SPI SP I SPI SPI 5V Not Connected Gnd Gnd Power Supply Base (common unit) A Zone M - Duino Connector Arduino Pin Function AREF IOREF 2 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) Rx1/Tx1 * Pins used for the GPRS module Communication Pins Power supply connectors (24Vdc – GND )

8. Table of Contents General Description GPRS / GSM CONTROLLER 21 PLUS ............................. 10 Zone - Nomenclature ................................ ................................ ................................ ...... 10 Zone Distribution ................................ ................................ ................................ ............. 11 A Zone Features ................................ ................................ ................................ ............... 11 Mechanical dimension ................................ ................................ ................................ .... 11 General Features ................................ ................................ ................................ ............. 12 Technical Specifications: ................................ ................................ ........................... 13 General Specifications: ................................ ................................ ................................ .... 13 Performance Specification: ................................ ................................ ............................. 13 Precautions ................................ ................................ ................................ ................ 14 Arduino Board ................................ ................................ ................................ ................. 14 Intended Audience ................................ ................................ ................................ .......... 14 General Precautions ................................ ................................ ................................ ........ 14 Software interface ................................ ................................ ................................ ..... 14 How to connect PLC Arduino to PC ................................ ................................ ........... 18 How to connect PLC to power supply ................................ ................................ ....... 19 M - duino Family Pinout ................................ ................................ .............................. 20 A Zone connection ................................ ................................ ................................ .......... 20 B Zone (Analog Shield) ................................ ................................ ................................ .... 22 Switch Configuration ................................ ................................ ................................ . 23 A Zone: Communications ................................ ................................ ................................ 23 Analog Shields ................................ ................................ ................................ ................. 25 GPRS/GPS I/Os 5V pins ................................ ................................ ............................. 25 I2C pins – SDA/SCL ................................ ................................ ................................ .......... 26 Serial 0 – RX0/TX0 ................................ ................................ ................................ ........... 26 Serial 1 – RX1/TX1 ................................ ................................ ................................ ........... 27 SPI – MISO/MOSI/SCK ................................ ................................ ................................ ..... 27 Pin 3 ................................ ................................ ................................ ................................ . 27 Pin 2 ................................ ................................ ................................ ................................ . 28 A Zone Features : Communications & RTC & uSD ................................ .................. 29

24. 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 : ALWAYS AT OFF POSITION. Pin 2 and I0. 5 Are used by the Sim800L module (The GPRS/GSM Module). 2. D53(SD): ALWAYS AT OFF POSITION. On a GPRS/GSM Controller this switch allows the uSD storage , if this switch is ON, it does not enalbe any pin . 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 ) an d d isables 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 r each the RTC. 3. NC: Not connected. This 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 -

22. B Zone ( Analog Shield) Relay Shield 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 /I NT1 1 NC NC ( - ) 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 - NC - 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 Not Connected Not Connected 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