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IoTextra Combo: 2-Channel Precision Analog Input & 2-Channel Relay

Regular price: $24.50
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Sale price: $24.50

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SKU: 040601303812
Type: Combo IO
Availability: In Stock

Precision Measurement & Power Control

The IoTextra Combo is a high-performance multi-functional module designed to streamline your automation projects. By integrating two 10A power relays and two 16-bit precision differential analog inputs onto a single board, it eliminates the need for multiple modules, reducing wiring complexity and saving valuable space in your enclosure.

Built with industrial-grade reliability, the IoTextra Combo features a high-resolution ADS1115 ADC and robust galvanic isolation, making it the perfect bridge between your digital logic and the high-voltage loads.

Technical Analog Circuit Design

Reference Foundation (Common for Lite & STD): Both versions are equipped with the REF3425 precision voltage reference and TLV333 zero-drift operational amplifiers.
Dual Active Filtering: The signal is filtered at both the Op-Amp input and its output before reaching the ADC.
Differential Design: A fully differential signal path ensures maximum common-mode noise rejection.
Clean Power: The analog section is powered by a dedicated TPS62173 (+5V_AN) DC-DC converter, isolating measurements from digital noise.

Key Features and Benefits

Feature	Benefit
Hybrid Switching & Sensing	Control power loads and monitor high-precision sensors simultaneously with one module.
16-Bit High-Resolution ADC	Captures minute signal changes with exceptional accuracy, perfect for critical data acquisition.
Dual 10A SPDT Relays	Rugged mechanical relays capable of switching up to 250VAC/30VDC for pumps, motors, or lighting.
Differential Input Channels	Two independent differential channels effectively suppress common-mode noise for clean, trustworthy sensor data.
Dual-Mode Control	Flexible integration: use direct GPIO for speed or I²C for scalability (daisy-chain up to 16 modules).
Industrial Protection	Includes reverse power supply polarity protection and TVS diodes for Electrostatic Discharge (ESD) protection, guaranteeing a long service life in harsh environments.

Out-of-the-Box Precision

Stop wrestling with external protection and signal conditioning circuits. IoTextra Combo comes with professional-grade filtering and stabilization integrated directly into the signal path. Just connect your sensor and get reliable, noise-free 16-bit data immediately.

Plug & Play Synergy

Maximize your project’s potential with the Make Things Happy! ecosystem:

IoTsmart Series: Transform the IoTextra Combo module into a standalone smart node in seconds. Simply plug the controller into the HOST connector—no wiring required.
IoTbase Series: Seamlessly integrate the IoTextra Combo module into large-scale/ DIN-rail systems for complex industrial or home automation.
Raspberry Pi & Arduino: Connect to any single-board computer using standard Qwiic® cables for a solderless, high-precision analog upgrade.

Technical Specifications

Relays: 2x SPDT (1 Form C), 10A @ 250VAC / 30VDC.
ADC: 16-bit ADS1115 Delta-Sigma (Texas Instruments).
Analog Inputs: 2 Differential channels (Voltage or Current).
Voltage Ranges: ±0.5V, ±5V, ±10V (and unipolar variants).
Current Ranges: 0–20mA, 4–20mA, ±20mA, 0–40mA.
Interface: I²C (Standard & Fast modes) + 2x Qwiic® Connectors.
Power Supply: +5V DC (with reverse polarity protection).
Dimensions: Standard IoTextra form factor (47 x 56 mm).

Primary Applications

Industrial Telemetry: Data collection from 4-20mA and 0-10V sensors in high electromagnetic interference environments.
Compact PLC Systems: Build space-efficient industrial controllers with combined I/O.
Smart Agriculture: Precision monitoring of soil moisture, pH, and conductivity (EC) sensors with simultaneous pump control.
Energy Monitoring: Measuring currents and voltages in power monitoring systems.
Laboratory Automation: Use in test benches where long-term stability of readings is critical.
Automated Test Equipment: Create versatile test benches that require both signal measurement and load switching.

Ecosystem Compatibility

The IoTextra Combo is fully compatible with the IoTsmart series microcontrollers and IoTbase expansion boards. It offers seamless "plug-and-play" connectivity via Qwiic® cables or the 12-pin HOST connector, supporting platforms like Raspberry Pi, Arduino, ESP32, and STM32.

This module is a member of loTextra series, which serves as a fundamental building block of our ecosystem and embodies the Make Things Happy Philosophy. It is engineered to bridge the gap between rapid prototyping and industrial-grade reliability.

Note: Usage with IoTbase or horizontal-mounted IoTsmart versions (V-HOST connector) requires a Height Extender or a dedicated riser adapter.

Choose Your Precision Level

The difference between versions lies solely in the tolerance and stability of the passive components in the analog section.

Feature	IoTextra Combo Lite	IoTextra Combo STD
Resistors (Analog Path)	Industrial (1%)	Precision (0.1% Low-T.C. )
Filter Capacitors	Industrial (Low-ESR)	Precision (High Stability)
Voltage Reference	REF3425 (VREF)	REF3425 (VREF)
Operational Amplifier	TLV333 (Zero-Drift)	TLV333 (Zero-Drift)