SDC2-THCQ - Duct Mounted


Duct mounted Controller and Sensor (X2 OS) for Temperature, Humidity, CO2 and Air Quality

The SDC2 is a programmable controller and sensor with communication capabilities. Each control loop may use 2 PI sequences and 2 binary stages. The SDC2 comes with a built in RS485 communication interface that allows peer to peer communication with an operation terminal such as OPT1-(2TH)-VC.

Communication plug-in allow for integration of the controller into a network. These modules are described in their own manual. Currently available are plug-ins for BACnet and MODBUS.

Flexible application configuration is made with a parameter-setting routine using the standard operation terminal.

Complete parameter sets may be copied by use of an accessory called AEC-PM2 or exchanged with a PC using an RS485-USB converter and the EasySet program.


  • Ventilation control
  • Air measurement
  • Zone control
  • VAV control


  • Two universally configurable control loops:
  • Functions for dehumidifying, set point shift and cascade control
  • Multiple auxiliary functions: heat-cool auto changeover, automatic enable, set point compensation
  • Free heating and cooling with economizer function based on enthalpy or temperature
  • Differential, averaging, min and max functions, enthalpy and dew point calculations
  • Transmitter function for inputs and set points
  • Universal analog outputs (VDC, mA) and one relay with a normally open and a normally closed contact (SPDT)
  • 8 freely assigned alarm conditions, selectable state of outputs on alarm condition
  • Password protected programmable user and control parameters
  • Measures temperature, humidity, CO2 and VOC


 Product Name  Product No.  Functions
 SDC2-16-C-200.101U-1  40-300167
    2 control loops
    1 universal input (except SDC2-16-C)
    1 analog output
    1 digital output
C = CO2 sensor
Q = VOC air quality sensor
TH = Temperature and humidity sensor
MOD = Communication with Modbus RTU or ASCII
BAC = Communication with BACnet MS/TP
 SDC2-16-TH-210.102U-1  40-300171
 SDC2-16-THQ-210.102U-1  40-300168
 SDC2-16-THCQ-210.102U-1  40-300164
 SDC2-16-TH-210.102U-MOD-1  40-300172
 SDC2-16-THC-210.102U-MOD-1  40-300174
 SDC2-16-THQ-210.102U-MOD-1  40-300162
 SDC2-16-THCQ-210.102U-MOD-1  40-300165
 SDC2-16-TH-210.102U-BAC-1  40-300166
 SDC2-16-THC-210.102U-BAC-1  40-300173
 SDC2-16-THQ-210.102U-BAC-1  40-300161
 SDC2-16-THCQ-210.102U-BAC-1  40-300163
   Pre-Configured Versions
 SDC2-16-TH-210.102U-1-W8  40-300171-W8
W8 = Dew point sensor, ISO unit °C
W28 = Dew point sensor, Imperial unit °F
W9 = Enthalpy sensor, ISO unit kJ/kg
W29 = Enthalpy sensor, Imperial unit BTU/lb
 SDC2-16-TH-210.102U-1-W28  40-300171-W28
 SDC2-16-TH-210.102U-1-W9  40-300171-W9
 SDC2-16-TH-210.102U-1-W29  40-300171-W29


OPC2-S - Built-in Display
Operation and display for intelligent X2 duct and outdoor controllers
X2-Operation Terminals
Remote and built-in operation terminals
AEI-4UI - Input Extension
Input extension for X2 controllers
AEC-PM2 - Memory
External memory for parameter sets for X2-series
AEC-USB - USB to RS-485 Converter Cable Kit
For programming X2-devices with EasySet tool


Operation Manual

Install Sheet

Application Notes