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NORVI ARITA-MEGA-M8 – DATASHEET
5 min read
Table of Contents
Product Features #
- RS-485 Communication
- Built-in 0.96 OLED Display
- Built-in Button on the front panel
- Ethernet connectivity
- micro-SD Card support
- Digital Inputs
- Relay outputs
- Transistor outputs
- Analog inputs
- DIN-Rail mount
Expansions Supported #
- Analog Input
- Digital Input
- Transistor Output
- Relay Output
- Analog Output
Main #
| Range of Product | NORVI ARITA |
| Product Type | Programmable Controller |
| Certifications | EN 61131-2:2007 EN 61010-1:2010+A1:2019 EN IEC 61010-2-201:2018 2014/30/EU- Electromagnetic Compatibility (EMC) Annex III, Part B, Module C |
| Rated supply voltage | 24V DC |
| Communication | I2CRS-485 |
| Inputs and Outputs | 14 x Digital Inputs 10 x Relay Outputs 2 x Transistor Outputs 2 x Analog Inputs with 0 – 10V 2 x Analog Inputs with 4-20mA |
| Displays and Visual Indicators | 1 LED green for PWR 1 LED green for RUN 14 LED green for I0……I14 10 LED green for Q0……Q4 and R0…..R4 2 LED green for T0….T1 |
Complementary #
| Product Unified Code | NORVI ARITA-MEGA-M8 |
| Product Part Numbers | NORVI ARITA-MEGA-M8 |
Mechanical Properties #
| Enclosure | NORVI 207 |
| Mounting / Installation Method | DIN RAIL / MOUNTING TABS |
| Terminal Type | Top hat type TH35-15 rail conforming to IEC 60715 Top hat type TH35-7.5 rail conforming to IEC 60715 Plate or panel with fixing kit |
| Terminal Arrangement | Top and Bottom |
| Depth | 56.60 mm |
| Height | 86.60 mm |
| Width | 122.10 mm |
Environment #
| IP degree of protection | IP20 |
| Operating altitude | 0 – 2000 meters |
| Operating Temperature | – –10 … +85° C (14…185 °F) |
| Storage altitude | 0 – 3000 meters |
| Shock resistance | 15 gn for 11ms |
| Resistance to electrostatic discharge | 4kV on contact 8kV on air |
| Resistance to electromagnetic fields | 10 V/m (80 MHz …… 1GHz) 3 V/m (1.4 MHz …… 2 GHz) 1 V/m (2 MHz …… 3 GHz) |
Electrical Characteristics #
Grid Powered Devices #
| Rated Supply Voltage (V) | 24V DC |
| Current Consumption (mA) | 400mA |
| Recommended Power Source | 1A 24V DC |
Processing #
| SOC / MCU | ATmega2560-16AU |
| Flash Memory | 256KB |
| EEPROM | 4KB |
| SRAM | 8KB |
Peripherals #
microSD Card support #
| Card Type | microSD |
| Interface | SPI |
| SD Detect | D45 |
| SD CARD CS | D46 |
| MISO | D50 |
| MOSI | D51 |
| SCLK | D52 |
Internal RTC #
| RTC Chip | DS1307ZN+ |
| Backup Battery Type | CR2450N-IB |
| Interface | I2C |
| I2C Address | 0x68 |
| SCL Pin | D21 |
| SDA Pin | D20 |
Built-in Buttons #
| Button 1 Pin | D22 |
| Button 2 Pin | D23 |
| Button 3 Pin | D24 |
| Button 4 Pin | D25 |
OLED Display #
| Display Driver | SSD1306 |
| Display Size | 0.96 inch |
| SCL Pin | D21 |
| SDA Pin | D20 |
INPUTS and OUTPUTS #
Digital Inputs #
| Number of Digital Inputs | 14 |
| Digital Input Polarity | Sink and Source |
| Digital Input Maximum Voltage | 32V DC |
| Digital Input Minimum Voltage | 18V DC |
| Maximum Switching Frequency | 1 kHZ |
| Terminal Arrangement | Digital Input 1 – D19 Digital Input 2 – D18 Digital Input 3 – D26 Digital Input 4 – D27 Digital Input 5 – D28 Digital Input 6 – D29 Digital Input 7 – D30 Digital Input 8 – D31 Digital Input 9 – D32 Digital Input 10 – D33 Digital Input 11 – D34 Digital Input 12 – D35 Digital Input 13 – D36 Digital Input 14 – D37  |
Analog Inputs #
| Number of Analog Inputs | 4 |
| Analog Input Measurement Range | 4 – 20mA 0 – 10V |
| Analog Input Maximum Voltage | 38V DC |
| Analog to Digital Converter (ADC) | ADS1115 |
| Analog to Digital Converter (ADC) Communication | I2C |
| Analog to Digital Converter (ADC) Address | 0x48 |
| Terminal Arrangement | A0 : Analog Input 0 – ADS1115 – 0x48 – AIN0 A1 : Analog Input 1 – ADS1115 – 0x48 – AIN1 A2 : Analog Input 2 – ADS1115 – 0x48 – AIN2 A3 : Analog Input 3 – ADS1115 – 0x48 – AIN3  |
Transistor Outputs #
| Number of Transistor Outputs | 2 |
| Transistor Output Type | OPEN COLLECTOR |
| Maximum Sink/Source Current (mA) | 100mA |
| Maximum Applicable Voltage | 40V DC |
| Maximum Switching Frequency | 1 kHz |
| Terminal Arrangement | T0 – D11 T1 – D12  |
Relay Outputs #
| Number of Relay Outputs | 10 |
| Relay Output Type | Normally Open / SPST / Electro-mechanical |
| Contact Current Rating (Resistive) | 5 A 30V DC/250V AC |
| Maximum Contact Voltage | 270V AC, 125V DC |
| Maximum Switching Frequency | 60 Hz |
| Terminal Arrangement | Relay Output 0 – D4 Relay Output 1 – D5 Relay Output 2 – D2 Relay Output 3 – D3 Relay Output 4 – D6 Relay Output 5 – D7 Relay Output 6 – D8 Relay Output 7 – D9 Relay Output 8 – D53 Relay Output 9 – D10  |
Communication Channels #
RS-485 Communication #
| Communication Mode | HALF-DUPLEX |
| Transceiver | MAX485CSA |
| Unit Load | 1/4 |
| Flow Control / Direction Control Pin | D42 |
| TX Pin | D14 |
| RX Pin | D15 |
| Terminal Arrangement |  |
Ethernet SPI – W5500 #
| Transceiver | W5500 |
| Speed | 10BaseT/100BaseTX |
| Supports Auto-Negotiation | Yes |
| TX/RX Buffer Size | Internal 32 Kbytes Memory |
| Supported Hardwired TCP/IP Protocols | TCP, UDP, ICMP, IPv4, ARP, IGMP, PPPoE |
| Number of Simultaneous independent sockets | 8 |
| INTn | D47 |
| SCSn | D48 |
| RSTn | D49 |
| MISO | D50 |
| MOSI | D51 |
| SCLK | D52 |
Wifi Communication #
| Protocol | Integrated TCP/IP |
| Model Name | ESP8266MOD |
| Operating Voltage | 3.6V |
| Flash | 4M |
| Power Consumption | < 1.0mW |
Bluetooth Communication #
| Model Name | WT51822-S4AT |
| Operating Voltage | 3.3V |
| Flash | 256KB |
| RAM | 16KB |
GPIO Map #
| Pin | GPIO | Usage |
| 1 | D4 | Relay Output 0 |
| 5 | D5 | Relay Output 1 |
| 6 | D2 | Relay Output 2 |
| 7 | D3 | Relay Output 3 |
| 12 | D17 | Expansion – RX2 |
| 13 | D16 | Expansion – TX2 |
| 15 | D6 | Relay Output 4 |
| 16 | D7 | Relay Output 5 |
| 17 | D8 | Relay Output 6 |
| 18 | D9 | Relay Output 7 |
| 19 | D53 | Relay Output 8 |
| 20 | D52 | SCK |
| 21 | D51 | MOSI |
| 22 | D50 | MISO |
| 23 | D10 | Relay Output 9 |
| 24 | D11 | Transistor Output 0 |
| 25 | D12 | Transistor Output 1 |
| 26 | D13 | Expansion – EXP_1 |
| 35 | D49 | RSTN |
| 36 | D48 | SCSN |
| 37 | D47 | INTN |
| 38 | D46 | SDCS |
| 39 | D45 | SD detect |
| 42 | D42 | RS 485 – FC |
| 43 | D21 | SCL |
| 44 | D20 | SDA |
| 45 | D19 | Digital Input 1 |
| 46 | D18 | Digital Input 2 |
| 50 | D38 | Expansion – EXP_2 |
| 53 | D37 | Digital Input 14 |
| 54 | D36 | Digital Input 13 |
| 55 | D35 | Digital Input 12 |
| 56 | D34 | Digital Input 1 |
| 57 | D33 | Digital Input 10 |
| 58 | D32 | Digital Input 9 |
| 59 | D31 | Digital Input 8 |
| 60 | D30 | Digital Input 7 |
| 63 | D15 | RS 485 – RX |
| 64 | D14 | RS 485 – TX |
| 71 | D29 | Digital Input 6 |
| 72 | D28 | Digital Input 5 |
| 73 | D27 | Digital Input 4 |
| 74 | D26 | Digital Input 3 |
| 75 | D25 | Button 4 |
| 76 | D24 | Button 3 |
| 77 | D23 | Button 2 |
| 78 | D22 | Button 1 |
| 84 | ADC13 | Bluetooth – TX |
| 85 | ADC12 | Bluetooth – RX |
| 86 | ADC11 | Wifi – Enable |
| 87 | ADC10 | Wifi – Reset |
| 88 | ADC9 | Wifi – RX |
| 89 | ADC8 | Wifi – TX |
Expansion Port #
| PIN | ESP32 Connection |
| 1 | GND |
| 2 | SDA1 |
| 3 | EXP_2- D38 |
| 4 | SCL1 |
| 5 | EXP_1- D13 |
| 6 | MOSI1 |
| 7 | RX2 |
| 8 | MISO |
| 9 | TX2 |
| 10 | SCK1 |