Product Overview #
The EC-M12-BC-C6-C-A is a rugged, IP67-rated IoT telemetry unit designed for outdoor and remote monitoring applications. Powered by high-capacity non-rechargeable lithium batteries, it ensures years of autonomous operation even in harsh conditions. Built on the ultra-low-power STM32L072 MCU with multi-network cellular connectivity, it integrates directly with industrial 4–20 mA sensors, making it ideal for utilities, environmental monitoring, agriculture, and industrial assets.
Key Features #
- Rugged Outdoor Design
- IP67 weatherproof enclosure for reliable operation in rain, dust, and extreme outdoor environments
- Industrial-grade connectors with cable gland for secure field deployment
- Cellular Connectivity
- Multi-band modem: 2G / Cat-M / Cat-NB (NB-IoT)
- Available with SIM7070 & Quectel BC660K module for wide coverage and low-power IoT data transfer
- Sensor Interface
- 2 × 4–20 mA analog inputs for direct connection to industrial sensors
- Integrated 12V excitation supply for powering field sensors
- Power Supply
- Two ER34615H lithium batteries (19,000 mAh each)
- Total capacity: 38,000 mAh
- Non-rechargeable, optimized for multi-year, maintenance-free operation
- Accessories
- Industrial cable gland connector for sealed field wiring
Technical Specifications #
Main #
| Range of Product | NORVI SENSOR NODE |
| Product Type | Programmable Sensor Node |
| 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 | Built-in Battery LiSoCL |
| Communication | SIMCOM SIM7070 – 2G / NB-IoT |
| Inputs and Outputs | 2 x Analog Inputs 4 – 20mA 1 x Sensor Power – 12V DC |
| Displays and Visual Indicators | Connectivity Indicator |
Complementary #
| Product Unified Code | EC-M12-BC-C6-C-A |
| Product Part Numbers | EC-M12-BC-C6-C-A |
Mechanical Properties #
| Enclosure | ABS + PolyCarbonate / IP67 |
| Mounting / Installation Method | Wall mount / Pole Mount |
| Terminal Type | M8 – 12 pin connector |
| Terminal Arrangement |  |
| Length | 146.00 mm |
| Height | 50.00 mm |
| Width | 89.99 mm |
Environment #
| IP degree of protection | IP67 |
| Operating altitude | 2000 meters |
| Operating Temperature | –40 °C to +85 °C |
| Storage Temperature | –45 °C to +90 °C |
| Shock resistance | Operating: 30 g, 11 ms half-sine; non-operating: 50 g, 11 ms |
| Resistance to electrostatic discharge | Not Applicable |
| Resistance to electromagnetic fields | VBAT/GND: ±5 kV / ±10 kV Antenna: ±5 kV / ±10 kV USB: ±4 kV / ±8 kV UART: ±4 kV / ±6 kV Other pads: ±1 kV / ±2 kV |
Electrical Characteristics #
| Battery Nominal Voltage | 3.6V |
| Battery Capacity | 19000 mAh @ 2.0mA Drain |
| Chemistry of the Battery | Lithium Thionyl Chloride |
| Maximum Continuous Discharge Current | 150mA |
| Maximum Pulse Discharge Current | 300mA |
| Charging source maximum voltage | Not Rechargeable |
Processing #
| SOC / MCU | STM32L072CZT6TR |
| Flash Memory | 192KB Flash |
| ROM | 6 KB |
| SRAM | 20 KB |
| PSRAM | Not available |
Peripherals #
microSD Card support #
| Card Type | microSD |
| Interface | SPI |
| SD CARD CS | PA0 |
| MISO | PA6 |
| MOSI | PA7 |
| SCLK | PA5 |
| SD Detect | Not Implemented |
Internal RTC #
| RTC Chip | DS3231 |
| Backup Battery Type | CR2032 |
| Interface | I2C |
| I2C Address | 0x68 |
| SCL Pin | PA9 |
| SDA Pin | PA10 |
| RESET Pin | Not implemented |
INPUTS and OUTPUTS #
Analog Inputs #
| Number of Analog Inputs | 2 |
| Analog Input Measurement Range | 0 – 20mA / 4 – 20mA |
| Analog Input Maximum Voltage | 26V DC |
| Analog to Digital Converter (ADC) | ADS1115 |
| Analog to Digital Converter (ADC) Communication | I2C |
| Analog to Digital Converter (ADC) Address | 0x49 |
| Terminal Arrangement |  |
Communication Channels #
RS-485 Communication #
| Communication Mode | Half-Duplex |
| Transceiver | SN65HVD72 |
| Unit Load | 1/8 |
| Flow Control / Direction Control Pin | PB5 |
| TX Pin | PB6 |
| RX Pin | PB7 |
| Terminal Arrangement | |
Cellular Modem #
| Modem | SIMCOM A7672 |
| Technology | LTE Cat-M1 NB-IoT (NB1/NB2) GSM/GPRS fallback (2G) |
| Coverage / Supported Bands | (B1/B2/B3/B4/B5/B8/B12/B13/B18/B19/B20/B26/B28/B39) for Cat-M/NB, plus quad-band GSM (850/900/1800/1900 MHz). |
| Data Rate | LTE Cat-M1: up to 588 kbps DL / 1119 kbps UL NB-IoT: up to 26 kbps DL / 62.5 kbps UL GPRS: 85.6 kbps DL / UL |
| Power Control | PC13 – Active High |
| RX with MCU | PA2 |
| TX with MCU | PA3 |
GPIO Arrangement #
| GPIO | Description |
|---|---|
| PA0 | SD Card CS |
| PA1 | Not Utilized |
| PA2 | Modem RX with MCU |
| PA3 | Modem TX with MCU |
| PA4 | Not Utilized |
| PA5 | SD Card SCLK |
| PA6 | SD Card MISO |
| PA7 | SD Card MOSI |
| PA8 | Not Utilized |
| PA9 | DS3231 / ADS1115 SCL |
| PA10 | DS3231 / ADS1115 SDA |
| PA11 | Not Utilized |
| PA12 | Not Utilized |
| PA13 | Not Utilized |
| PA14 | Not Utilized |
| PA15 | Not Utilized |
| PB0 | Not Utilized |
| PB1 | Not Utilized |
| PB2 | Not Utilized |
| PB3 | Not Utilized |
| PB4 | Not Utilized |
| PB5 | RS485 Flow/Direction Control |
| PB6 | RS485 TX |
| PB7 | RS485 RX |
| PC13 | Modem Power Control (Active High) |
