EQXAI08 – 8-Channel Analog Input Expansion Module for EQSP32

Description

The EQXAI is an 8-channel analog input, DIN rail, expansion module designed to bring high-precision voltage and current measurement capabilities to the EQSP32 Industrial IoT controller. Each of the eight input channels can be individually configured for 0–10 V voltage sensing (AIN mode) or 4–20 mA current-loop sensing (CIN mode), allowing a single module to support mixed sensor types simultaneously.

To achieve high measurement stability, EQXAI combines its 12-bit ADC with hardware RC filtering, precision voltage-reference conditioning, and software oversampling techniques to reach up to 14-bit effective resolution. The eight channels are sampled sequentially in two independently updated groups (CH1–4 and CH5–8), allowing parallel acquisition across both groups. This architecture provides efficient, low-noise measurements while maintaining a high update rate suitable for demanding industrial monitoring applications.

The EQXAI implements dedicated over-current protection for CIN channels, where an internal mechanism automatically isolates the precision shunt resistor when input current exceeds 21 mA. This prevents thermal stress and long-term degradation of the sensing resistor, ensuring consistent measurement accuracy over the module’s lifetime. The system periodically checks whether the over-current condition has cleared and safely reconnects the shunt resistor once normal operating levels are restored, guaranteeing robust operation even under demanding field conditions.

Each module is factory zero-calibrated to guarantee optimal accuracy out of the box. Users may also perform a zero-calibration at any time for applications requiring field alignment. To avoid unintended calibration corruption, the module validates every calibration attempt: results with excessive deviation or readings that are not sufficiently close to ground reference are automatically rejected. This protective mechanism ensures that calibration remains reliable, stable, and resistant to accidental misconfiguration.

Like all EQ expansion modules, EQXAI is housed in the standard DIN-rail enclosure offering a uniform and compact form factor. It is auto-detected by the EQSP32 upon power-up, requires no external power supply, and supports field-upgradeable firmware through its front-facing USB-C port. Complete integration is further supported by EQ-AI generative AI model, enabling code generation and setup simply by describing your wiring or desired functionality.

The result is a highly flexible, precision analog input module ideal for monitoring industrial sensors, environmental measurements, process values, and any application requiring accurate multi-channel analog acquisition.

Key Features of EQXAI:

• Analog Inputs: 8x independent analog inputs, configurable per channel for 0–10 V (AIN) or 4–20 mA (CIN).
• High-Resolution Measurements: 12-bit ADC enhanced via oversampling for up to 14-bit effective resolution.
• Dual Sequential Sampling Groups: Channels 1–4 and 5–8 sampled in two independent acquisition groups.
• Over-Current Protection: Automatic isolation of precision shunt resistor when CIN current exceeds 21 mA, with periodic reconnection checks.
• 24V Tolerant Inputs: Voltage inputs measure up to 10V but are safe up to 24V.
• Calibration: Factory zero-calibrated with optional validated user zero-calibration.
• Sample Filtering: RC hardware filtering combined with digital averaging.
• Field‑Upgradable Firmware: Firmware updates available via the front-facing USB‑C port.
• Expandability: Add up to 15 expansion modules as needed to extend functionality.
• Visual indicators: Power and status LEDs for easy monitoring.
• Seamless Integration: Programming and integration simplified through the provided library API and the EQ-AI code generation assistant.
• Automatic Detection: EQXIO is automatically detected by EQSP32 upon power-up for a plug-and-play experience.
• Compact Design: Fits on standard DIN-rail.
• Connection: After mounting the module on the DIN-rail, simply slide it to connect with EQSP32 via the board-to-board connector.

Technical Specifications of EQXAI

EQXAI Functional Block diagram

Support and Documentation

Find all related resources at Erqos – Resources.

Contact us at any time for consulting or support using the contact form, our direct chat in the website or post your questions in Erqos forum.

Get inspired by our application blog featuring application examples, news and articles.

Integration Services

If you need help building your Industrial IoT automation, send us your application requirements and let us build it for you!

Return policy.