What is it?

This is a multi-functional control board equipped with dual MCUs: a master MCU (ATmega2560V) and an additional ATmega328P processor for FoTA (Firmware Over-The-Air) updates. It features a Telit LE910C1-EUX 2/3/4G GSM Modem and a precision 3-phase energy analyzer with current transformers mounted on the PCB. The board includes 8 opto-isolated 220V input detection circuits and 2 relay contacts rated at 220V 10A. It supports communication via RS485 and TTL serial ports and is equipped with a Serial ID chip, an external watchdog chip, and an external RTC. The board can be powered by either 220V or 5V, and it includes a 18650 battery holder with an integrated charging circuit.

Why did you make it?

This board was designed for remotely controlling agricultural irrigation pumps, monitoring active and reactive energy consumption, and providing real-time tracking of energy faults to protect the pumps from damage. It features an RS485 port for real-time monitoring of irrigation pressure and takes actions based on pressure conditions according to predefined programs. The 8 opto-isolated 220V inputs are used to monitor the status of the three-phase power, contactors, motor protection relays, and thermal relays. This allows users to be informed of phase or energy losses, pump operation status, motor protection relay faults, and thermal relay faults. Additionally, with two relay outputs, the board can start and stop the pump. Each device can be individually tracked via its Serial ID, and it is equipped with a high-quality RTC and an external watchdog to prevent unforeseen processing errors.

What makes it special?

This multi-functional control board stands out due to its extensive feature set and adaptability for various applications. It is equipped with dual MCUs (ATmega2560V and ATmega328P) to provide robust performance and supports FoTA (Firmware Over-The-Air) updates, ensuring the system remains current with minimal effort. The integrated Telit LE910C1-EUX 2/3/4G GSM Modem enables reliable remote control and monitoring capabilities.

A key highlight is its precision 3-phase energy analyzer with onboard current transformers, allowing for accurate monitoring of energy consumption and immediate detection of energy faults. This ensures your equipment is protected from potential damage. The board features 8 opto-isolated 220V inputs, which can be used to monitor various critical parameters such as phase status, contactor status, motor protection relays, and thermal relays. This allows users to be promptly informed of any issues such as phase or energy losses, operational states, and faults.

Additionally, the board includes two high-capacity relay outputs (220V 10A) for direct control of connected devices. The RS485 port facilitates real-time monitoring and control, enabling automated responses based on predefined conditions. The Serial ID chip allows for unique identification and tracking of each device, while the high-quality RTC ensures precise timing functions. An external watchdog chip is also included to safeguard against unforeseen processing errors, enhancing the reliability and safety of your operations.

In summary, this control board is a versatile, robust solution suitable for a wide range of industrial and commercial applications. Its extensive monitoring and control capabilities, combined with advanced features like remote connectivity and automated fault detection, make it an ideal choice for users seeking reliable and adaptable control solutions.

Detailed Features

Energy Analyser

This module has an isolated Energy analyser that is an energy measurement processor for polyphase power-monitoring systems. It is designed for real-time monitoring.

Measured Parameters

Instant voltage for specified phase (R,S,T) RMS voltage for specified phase (R,S,T) Fundamental voltage for specified phase (R,S,T) Harmonic voltage for specified phase (R,S,T) and specified harmonic Line frequency Instant current for specified phase (R,S,T) RMS current for specified phase (R,S,T) Peak current for specified phase (R,S,T) Fundamental current for specified phase (R,S,T) Harmonic current for specified phase (R,S,T) and specified harmonic Active power for specified phase (R,S,T) ReActive power for specified phase (R,S,T) Apparent power for specified phase (R,S,T) Fundamental power for specified phase (R,S,T) Harmonic power for specified phase (R,S,T) and specified harmonic. Power factor for specified phase (R,S,T) Fundamental ReActive power for specified phase (R,S,T) Harmonic ReActive power for specified phase (R,S,T) Fundamental VA power for specified phase (R,S,T) IC Temperature

B107AA-R2 Changes

• SMPS footprint changed to multiple module types.
• External adapter socket added.
• Power LED added.
• Watchdog control IC added.
• ICSP programming sockets updated.
• GSM Modem test connector added.
• Power supply inductors updated.
• Diodes on relay polarity bug fixed.
• Reset button moved to the edge of the board.
• Notr lines updated on internal layer.
• Energy metering caliration socket added.
• Voltage divider resistor values changed to 750 ohm.
• Some footprints updated.
• C16 and C34 capacitor footprints updated (new footprint is 0603).
• 22uF capacitors PN updated (new footprint is 0805).
• GSM Modem power segment capacitors updated (100uF tantalium).
• GSM communication buffer some caps and resistors position changed.
• Crystal placement updated.
• Silk layer updated.
• Battery silkscreen updated.

B107AA-R3 Changes

• Size update (180mm --> 200mm width).
• Corner holes updated.
• ISO7741 component update (enable pins changed to high).

B107AA-R4 Changes

• Size update (200mm --> 171mm width).

B107AA-R5 Changes

• Hole update (some holes are removed)
• Silk update.
• SD Sense pulldown added.
• RS485 Interrupt pulldown added.
• Voltage translator IC changed.
• ISO7741 component update (BOM and schematic changes).
• C8, C25, C71, C147, C150 Capacitor PN corrected.
• SW1 PN changed (Button size updated)