The highest I/O count in the range — 21 DI, 24 DO, 16 relays.
NEXTuino CREST is the flagship of the NEXTuino range. With 21 digital inputs, 24 digital outputs, 16 relay outputs, RS-485 Modbus RTU and Ethernet, the CREST handles the most complex industrial automation without requiring external I/O expansion. Powered by ATmega2560 — fully compatible with the entire Arduino Mega ecosystem.
| Microcontroller | ATmega2560 @ 16 MHz |
|---|---|
| Flash / SRAM / EEPROM | 256 KB / 8 KB / 4 KB |
| Digital Inputs | 21 × protected (16 analog-capable + 5 dedicated) |
| Digital Outputs | 24 × transistor, up to 2 A each |
| Relay Outputs | 16 × relay, up to 10 A / 240 V AC |
| Analog Inputs | 16 × 10-bit ADC (shared with DI) |
| Communication | RS-485 Modbus RTU, Ethernet (W5100), UART, SPI, I²C |
| Arduino Headers | Full Arduino Mega 2560 pin headers |
| Supply Voltage | 12 V DC or 24 V DC |
| Power Consumption | < 4 W (controller only) |
| Operating Temperature | -10 °C to +55 °C |
| Dimensions (H × W × D) | 90 × 107 × 62 mm |
| Weight | ~ 370 g |
| Mounting | DIN rail (EN 60715) |
| Certification | CE |
21 inputs and 24 outputs handle complex multi-station machines without I/O expansion.
Ethernet and RS-485 provide dual connectivity to SCADA systems and field instrument buses.
24 transistor outputs drive actuators, solenoids and indicator lights across complex sequences.
16 relay outputs switch sub-panels and loads; Modbus reads energy meters on the RS-485 bus.
Large I/O count handles multi-zone HVAC, lighting and access control in one controller.
16 analog-capable inputs and 24 digital outputs cover complex automated test bench requirements.
Choose the CREST when your machine requires more than 12 digital inputs, more than 12 digital outputs, or more than 10 relay outputs. The CREST's 21 inputs, 24 outputs and 16 relays eliminate the need for external I/O expansion in most applications.
Yes. The CREST includes both an on-board RS-485 transceiver for Modbus RTU and a W5100-based Ethernet port — the same dual connectivity as the standard PEAK.
Yes. The CREST is based on ATmega2560. All Arduino Mega 2560 libraries and sketches are fully compatible.
The CREST CORE has the same I/O, MCU and connectivity but omits Arduino pin headers — suited to volume OEM builds where shield expansion is not required.
Request a sample, ask for a quote, or speak with an applications engineer.