KinCony KC868-E16S – 16-Channel ESP32 Smart Relay Controller

Overview

The KinCony KC868-E16S is a professional-grade ESP32 relay controller designed for automation, data collection, and control applications. With 16 isolated digital inputs, 16 high-current relay outputs, 4 analog inputs, RS485, Ethernet, 433 MHz, I²C, and USB, it provides a complete platform for smart home, industrial and IoT projects. The board supports ESPHome, Tasmota, Arduino, ESP-IDF, and custom firmware for full flexibility.

Key Features

• ESP32 (ESP-WROOM-32) Wi-Fi + Bluetooth controller

• 16 × relay outputs (16 A, 250 VAC / 16 A, 30 VDC)

• 16 × opto-isolated “dry contact” digital inputs

• 4 × analog inputs (2 × 0–5V, 2 × 4–20 mA)

• Built-in test buttons for all 16 inputs

• Ethernet LAN8270A interface

• RS485 interface for Modbus/serial integration

• 433 MHz RF receiver module connector

• USB programming port

• Piezo buzzer onboard

• I²C expansion connector

• Serial (UART) expansion connector

• Replaceable relay modules with socket mounts

• DIN-rail mountable enclosure

• Works with ESPHome, Tasmota, KCS firmware, Arduino, ESP-IDF

Technical Specifications

Processor

• ESP-WROOM-32 (ESP32)

Power

• Input: 12 V DC

Relay Outputs (16 channels)

• Type: NO + COM

• Rating: 250 VAC / 16 A or 30 VDC / 16 A

• Replaceable relays (socket-mounted)

• Relay status LEDs on each channel

Digital Inputs

• 16 × opto-isolated dry-contact inputs (EL357)

• 16 × input test buttons

• Managed via PCF8574 I²C expanders

Analog Inputs (4 channels)

• 2 × 0–5 V inputs

• 2 × 4–20 mA current-loop inputs

• LM224 Op-Amp front-end

Wireless / Communication

• Wi-Fi (ESP32)

• Bluetooth (ESP32)

• RS485

• Ethernet LAN8270A

• 433 MHz RF receiver connector

Expansion / I/O

• I²C connector

• UART serial port

• Piezo buzzer

• USB programming port

• Reset + Download buttons

Other

• DIN rail mounting

• High-quality PCB with labelled terminals

Dimensions

• — (Manufacturer does not list; enclosure similar to other KC868 series)

Installation / Application Notes

• Power with a stable 12 V DC supply.

• Relays provide NO + COM terminals only (no NC).

• Use opto-isolated inputs for dry-contact sensors, switches, alarm inputs, etc.

• Analog inputs support both 0–5 V and 4–20 mA sensors.

• Replaceable relays allow quick field servicing.

• ESP32 can be programmed with ESPHome, Tasmota, Arduino, or ESP-IDF.

• Ethernet or Wi-Fi can be used for network connectivity.

• RS485 enables Modbus or long-distance serial communication with other devices.

• 433 MHz receiver can be used for RF sensors/buttons (receiver sold separately).

• Ideal for automation cabinets, DIN-rail installations, and multi-zone control systems.