Split-type Digital Thermostat Controller

Product code Cooling valve Heating valve Fan speed B3x operation mode Supported low voltage thermostat interface
DL-B32C relay (SPST-NO) relay (SPST-NO) relay (L,M,H) Yes

xx-TD90A (cooling & fan)

xx-TD92A (cooling & fan & heating)

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




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

  • Input power: 230VAC.

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

  • 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-B32C Wiring Diagram