EasyIO FC-20 - 20-point I/O expansion controller for BMS

EasyIO FC-20 20-Point I/O Expansion Controller

The EasyIO FC-20 is a programmable controller from EasyIO's FC Series, designed to provide a flexible and cost-effective I/O expansion solution for Building Management Systems (BMS).

The device supports the choice of BACnet MSTP or Modbus RTU protocols, allowing for easy integration into existing automation infrastructure. With its optimized hardware architecture and stable processing capabilities, the FC-20 is suitable for a wide range of applications such as:

• AHU/FCU/RTU control
• Small-scale HVAC system control
• Plant room control
• I/O expansion module or signal dummy (dummy I/O)

Key Features

Flexible, easy integration

• Supports BACnet MSTP Server or Modbus RTU Slave (selectable via DIP switch)
• Industrial standard RS485 communication
• Compatible with most current BMS systems

Powerful I/O configuration

12 Universal Inputs (UI):

• Supports signals: 0-10V, 0-20mA, resistance
• Reads temperature, pressure, humidity sensors…

4 Digital Outputs (DO):

• SPST NO relay, electrically isolated
• Includes status LEDs

4 Analog Outputs (AO):

• 12-bit DAC
• Outputs 0-10V / 0-20mA

Stable Performance

• CPU: ARM Cortex-M3 @ 24MHz
• Flash: 256KB
• RAM: ~224KB

Optimized Design for Industrial Environments

• Power Supply: 24V AC/DC
• Operating Temperature Range: 0°C to 65°C
• Humidity: 10-90% RH (non-condensing)
• UL-compliant materials
• Certifications: CE, BTL, UL, FCC

Easy Programming with CPT Tool

• Uses CPT Tool (free license)
• Supports Quick Configuration:
  • I/O Mapping
  • Logic Control
  • BACnet Object

Main Specifications

• Power Supply: 24V AC ±5% / 24V DC +20% / -15%
• Power Consumption: < 11VA
• CPU: ARM Cortex-M3 - 24MHz
• Flash: 256KB
• RAM: ~224KB
• Interface: 2 x RS485
• Protocol: BACnet MSTP / Modbus RTU
• Universal Input: 12 x UI (12-bit ADC)
• Digital Output: 4 x Relay SPST NO
• Analog Output: 4 x AO (12-bit DAC)
• Dimensions: 191 x 104 x 44 mm
• Weight: ~410g