Low Voltage Touch Thermostat

Main features:

• LCD display with touch control on the screen.
• Heating and/or Cooling control.
• 3-step (Low, Mid, High) fan-speed control.
• To pre-set temperature with temperature compensation.
• RS-485 communication for remote configuration, control and monitoring.
• Available products:

  Series	cooling & fan	cooling & fan & heating
  Ultimate II	G2-TD70A	G2-TD72A
  Titanium	GC2-TD70A	GC2-TD72A
  Minimalist	EB2-TD70A	EB2-TD72A
  Radiance	K2-TD70A	K2-TD72A
  Glare	V2-TD70A	V2-TD72A
  Lavina 95	JC2-TD70A	JC2-TD72A

          If isolated RS485 is needed, please replace A with MT.

  • G2-TD70A (non-isolated RS485, RJ45 jack)
  • G2-TD70MT (isolated RS485, screw terminal).

Technical Data:

LCD display 

• Screen size: 2.3 inch
• Resolution: 320 * 240 pixel
• Color depth: 16 bit (65,536 color)
• Capacitive type touch screen
• Built-in back-light
• Standard background color: Navy blue

Temperature control

• Temperature units: Celsius or Fahrenheit
• Room temperature display range: 0^oC to 37oC (32^oF to 99^oF)
• Pre-set temperature range: 16^oC to 35^oC in 1^oC step (61^oF to 95^oF in 1^oF step)
• Temperature compensation: -8^oC to +8^oC (-14^oF to +14^oF)
• Type of built-in thermistor: NTC
• Control precision: +/- 1^oC
• Temperature control hysteresis: 1^oC

  Air-con Mode	Cooling / Heating valve	Fan speed at auto mode
  Cooling Mode
  Heating Mode

   

Electrical:

• Input voltage: 12VDC -  24VDC
• Power dissipation: < 500mW
• Two types of terminals:
  1. RJ45 jack (T568B-type termination)
  2. Screw-type removable connector
                     
• Cable type: CAT 5 / 6 cable with length less than 10m.
• RJ45 jack pin assignments:

  Pin #	Assignment
  1	0V DC (GND for RS485)
  2	RS-485 D-
  3	RS-485 D+
  4	Cooling valve signal
  5	Low fan speed signal
  6	Mid fan speed signal
  7	High fan speed signal
  8	+12V DC / +24VDC (Power Supply)

         *note: Do not provide "Heating value" signal pin on RJ45 jack.

• Screw-type terminal pin assignments:

  Pin #	Assignment
  1	RS-485 D+
  2	RS-485 D-
  3	+12V DC / +24VDC (Power Supply)
  4	0V DC (GND for RS485)

Mechanical:

• Operating Temperature: -5 ℃ to 40 ℃
• Dimensions: 86 x 86 mm
• Depth: ~34mm (high-voltage thermostat), ~24mm (low-voltage thermostat)
• Fix Center: 60.3 mm
• Materials for the front plastic: high grade polycarbonate
• Materials for housing: high grade polycarbonate

Configurable Controls:

To configure various settings and to control thermostat by means of RS-485 communication.

• To enable / disable touch-screen keys which include:
  1. Power key – To ON / OFF thermostat
  2. Fan-speed key – To adjust fan speed
  3. Air-Con mode key – To adjust air-con operating mode
  4. Temperature key – To enter pre-set temperature adjustment page

  *note: Once a key is disabled, user cannot change the related function.

• To change the pre-set temperature.
• To change the temperature compensation.
• To show / hide the following controls:
  1. Power control
  2. Air-con mode control (Cooling, Fan, Heating, Dry)
  3. Fan-speed control (Low, Mid, High, Auto, Off)
  4. Fan-speed numeric indicator 

  For example, the default of Fan-speed OFF is hide and invisible, user can only select Low, Mid, High, and Auto fan-speed..

RS-485 Communication Channel:

• 2-wire RS-485 communication port.
• Supported function code 0x03, 0x06 and 0x10 of Modbus RTU protocol.
• Port settings can be configured by means of RS-485 communication.
• Baud rate:   2400, 4800, 9600, 19200, 38400, and 115200 bps.
• Parity bit:    none, odd, and even parity.
• Stop bit:     1 stop bit and 2 stop bits.
• Default settings: 9600bps, none parity and 2 stop bits.
• Default Modbus station no. is # 3.