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Split-type Modulating Thermostat Controller

Product code Cooling valve Heating valve Fan speed B3x operation mode Supported low voltage thermostat interface

DL-B33C

0-10V proportional

No

3 relay (L, M, H) 

(SPST-NO)  

Yes

xx-TD70A (cooling & fan)

xx-TD72A (cooling & fan & heating)

xx = series (K2, GC2, G2, V2, JC2, EB2)

Features

  • A Din-Rail modules which can be installed beside the FCU.

  • Input power: 230VAC.

  • Built-in 12V DC (2A) power supply for Touch Thermostat

  • Cooling value output: 0 - 10V

  • Control logic: proportional output on cooling valve.

  • Fan speed output: 3 relays for low, mid and high speed.

  • Relay rating:

    Rated current Voltage
    3A 250VAC
    3A 24VAC
    3A 24VDC
    3A 12VDC
  • Two RS-485 ports
    Port Functions
    COM0 connect to Building Management System (BMS)
    download configuration, real time control and monitoring
    COM1 RJ45 jack - connect to low voltage touch thermostat with straight Cat5e cable
  • 3 Digital inputs
    -- Keycard input
    -- Check-in input
    -- Window input
    Features Data Additional info
    Input voltage 3.3 - 24V DC  
    Input current (min) 1.5mA  
    Load type input current sinking  
    Logic level activate (1) > 3.0V
    de-activate (0) < 0.5V
    Isolation yes Digital input's power (+V DC and GND) are isolated from controller's power
    These three inputs can have three independent power supply

 

DL-B33C Wiring Diagram

DL-B33C Sample Digital Input Connection Diagram