Erqos EQSP32CE is a DIN rail-mountable industrial IoT PLC based on an ESP32-S3 WiFi and Bluetooth SoC and offering Ethernet, RS-485, RS-232, and CAN bus industrial communication interfaces.
The IIoT logic controller also features several protected digital (16x) and analog (8x) inputs, eight current inputs, eight “special mode” analog inputs, and sixteen digital outputs with PWM support. A USB-C port is used for firmware flashing and monitoring, and the PLC takes a wide 7V – 26V DC input voltage and outputs 5V/1A for I/O expansion modules.
Erqos EQSP32CE specifications:
- SoC – Espressif ESP32-S3 dual-core LX7 processor @ 240 MHz with 8MB Flash, 512kB RAM, wireless connectivity (so probably ESP32-S3FN8)
- Communication interfaces
- 10/100 Mbps Ethernet RJ45 port
- Wi-Fi + Bluetooth Low Energy (on ESP32-S3) with internal antenna
- RS232 (protected) and RS485 half-duplex (protected) with support for Modbus RTU, DMX512, and custom serial protocols
- CAN Bus (protected)
- USB – 1x USB-C power for programming and monitoring
- I/O interfaces (software defined)
- Digital Inputs – Up to 16x protected, configurable 24V-tolerant digital inputs (all terminals supported)
- Analog Inputs – Up to 8x protected, configurable analog inputs (0–10V) on terminals 1–8
- Current Inputs – Up to 8x software-selectable 4–20mA inputs on terminals 1–8
- Special Analog Modes – Relative (RAIN) and Temperature (TIN) analog input modes on terminals 1–8
- Outputs – Up to 16x protected, configurable solid-state pull-down switches (PWM-capable)
- Misc
- Power, Status, WiFi, Bluetooth, and Ethernet LEDs
- Buzzer for system alerts
- Supply Voltage
- Input – 7V – 26V DC
- Output – 5V DC @ 1A (regulated auxiliary output)
- Dimensions – 90 x 71 x 57 mm
- Weight – 175 grams
- Temperature Range – -20°C to +55°C
- IP Rating – IP20
- Certification and Compliance (CE Compliance under Directive 2014/53/EU (RED):
- Safety (Electrical) – EN IEC 62368-1:2020 + A11:2020
- Outdoor Safety – EN 62368-1 Annex Y
- RF Exposure / Health – EN IEC 62311:2020, EN 50566:2017, EN 62479:2010, EN 50663:2017, EN 50665
- EMC (General/IT) – EN 55032, EN 55024 (or EN 55035)
- EMC (Wireless) – ETSI EN 301 489-1 V2.2.3, ETSI EN 301 489-17 V3.2.4
- Industrial EMC – ETSI EN 303 446-1 V1.2.1 (references EN 61000-6-2, EN 61000-6-4, and IT EMC standards)
- Radio (WiFi/BLE) – ETSI EN 300 328 V2.2.2 (Full + Spurious only), ETSI EN 300 440 V2.2.1 (Full + Spurious only), ETSI EN 301 893 V2.1.1 (Spurious only)
- Environmental – Directive 2011/65/EU (RoHS)
The EQSP32CE PLC can be connected to a range of expansion modules from Erqos, including digital I/O, analog input, analog output, thermocouple, PT100/RTD, pH, relay, and GSM/GPRS cellular modules. You’ll find more technical details on the documentation website for the ESQP32 PLC family
Like other members of the EQSP32 family, the EQSP32CE offers a software-defined I/O architecture, and all 16 terminals can operate as digital inputs or solid-state outputs, while the first eight also support analog modes. The device is designed to be programmed in C/C++ via the Arduino IDE or VS Code using the EQSP32 Arduino library, and advanced users can also rely on the ESP-IDF framework. The company also introduced the EQ-AI generative AI development system, powered by ChatGPT, enabling engineers to describe behavior in plain language or simple step-based logic to automatically produce C++ code for the EQSP32CE, handling MQTT topics, JSON payloads, network setup, reconnection logic, diagnostics, and REST endpoints.
While it’s the first time we cover an ESP32-S3 PLC from Erqos, this type of ESP32-based IIoT controller has been around for years from companies such as TECHBASE, NORVI/Iconic Devices, and Industrial Shields. The EQSP32CE just adds another option.
The EQSP32CE ESP32-S3 industrial IoT PLC is available now for $185/155 Euros on the Erqos online store in single-unit quantities, and volume pricing is available for OEM customers. The company is based in Greece, but they also have warehouses in the US and Hong Kong.
Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in 2011.
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