DT4211B

BACnet Field Control Device

BACnet LCD PID temperature controller

DT4211B is a BACnet B-ASC class PID temperature controller. It is designed for monitor and control building AHU or PAH.

Description

DT4211B is a BACnet B-ASC class PID temperature controller. It is designed for monitor and control building AHU or PAH. It has a 32 bit microprocessor. Works in a MS/TP network, communication speed up to 76,800bps. DT4211B has 4 binary inputs (BI), 2 analog inputs (AI), 1 binary output (BO), and 1 analog output (AO). LCD back light control panel for user control and monitor the system. DT4211B conforms international BACnet MS/TP communication protocol and fully compatible with any BACnet system.

Features

  • Conforms to ASHRAE and ISO16484-1 defined BACnet B-ASC standard communication protocol, compatible with BACnet system.
  • One MS/TP Master-Slave/Token- Passing port, peer-to-peer master/slave communication.
  • A stand alone 32 bits CPU with preset control firmware.
  • Large LCD display, show setting and actual temperatures with four characters each line. Show unit for these two values with three characters each. High lumen backlight.
  • A control panel ready design. Installation in a control room directly. Save time to design and make panel.
  • Four digital inputs (BI) to monitor running status, overload interrupt, filter, smoke detector.
  • Two 12bit analog inputs (AI), the first one for 10K (25℃) NTC thermistor, range 0~ 70 , the second one for 0~10Vdc or ℃ 4~20mA signal inputs, to monitor valve position, humidity sensor, CO2 sensor. Input signal type is selectable by the system management software.
  • One 8A/250VAC dry contact output (BO) can drive fan directly.
  • One PID analog output (AO), output signal can be 4~20mA or 0~10Vdc, control damper or valve motor.
  • Eight operation buttons for start/stop, temperature setting, alarm confirm, and setting.
  • Selectable alarm style as LCD code display, LCD backlight flash, or buzzer
  • Password setting for each user group. Time display, show current system time.
  • Fail-save function, keep save all setting status in flash memory

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