EVCB – VAV Unit Controller

• Field configured VAV algorithms
• Built-in actuator 70in.lb [8Nm]
• On board differential pressure sensor (pressure independent models)
• Manual or automatic pressure mode selection (pressure independent models)
• Configurable Inputs
  • 2 analog inputs
  • 2 digital inputs
• Configurable Outputs
  • 2 analog outputs
  • Up to 4 TRIAC outputs
• Configurable PI (Proportional-Integral) function
• Simple air balancing and commissioning via digital room sensor
• Independent, configurable proportional control band and dead band per ramp
• Selectable internal or external temperature sensor (10KΩ)
• Activate output with CO₂ from digital room sensor or external CO₂ sensor.
• Change over by contact or external temperature sensor
• 24Vac operation
• Removable, raising clamp, non-strip terminals
• 24Vac thermal fuse for overheat protection

• BACnet MS/TP or Modbus RTU (selectable via menu)
• Select MAC address via DIP switch or via network

BACnet MS/TP

• MS/TP @9600, 19200, 38400 or 76800 bps
• BACnet scheduler (up to 6 events)
• Firmware upgradeable via network
• COV (change of value)
• Copy and broadcast configuration to other EVCB modules via menu or network
• Automatic baud rate detection
• Automatic device instance configuration

Modbus RTU

• Modbus RTU @9600, 19200, 38400 or 57600 bps
• RTU Slave, 8 bits (configurable parity and stop bits)

• Single duct, cooling only
• Single duct cooling and/or heating
• Up to 4 stage reheat and/or cool
• Up to 4 On/Off heat and/or cool
• Up to 4 time proportioned (TPM) heat or reheat
• Up to 2 analog (0-10Vdc) reheat and/or cool
• Up to 2 floating heat and/or cool
• Pressure dependent or pressure independent
• With or without auto changeover
• Supply/exhaust (requires an additional EVC)