RDF302

Semi Flush-mount room thermostat for rectangular conduit box with Modbus communications, 2-/4-pipe fan coils or DX type equipment

Stock no. S55770-T238

Stock no. S55770-T238

Semi Flush Mount room thermostat for rectangular conduit box with LCD for fan coil units and compressors in DX-type equipment

  • For heating and/or cooling applications

  • Modbus communications

  • 2 or 3-position control outputs

  • Output for 1-speed or 3-speed fan

  • 2 multifunctional inputs for keycard contact, external room / return air temperature (QAH11.1, QAA32), heat / cool changeover, operation mode changeover, window contact on/off, dewpoint monitor, electrical heater enabled, fault contact

  • Operating modes: Comfort, Economy and Protection

  • Automatic or manual heating/cooling changeover

  • Adjustable commissioning and control parameters

  • Minimum and maximum setpoint limitation

  • Color of housing: signal white (RAL 9003)

  • Backlit display

Application selectable:

  • 2-pipe system

  • 2-pipe system with electrical heater

  • 4-pipe system


Attribute

Value

Operating voltage

AC 230 V

Frequency

50/60 Hz

Power consumption

7 VA

Positioning signal

2-position, 3-position

Control algorithm

2-point / PI

Ambient temperature, operation

0...50 °C

Setpoint setting range

5...40 °C

Measuring range, temperature

0…49 °C

Switching differential

0.5…6 K

Communication

Bus: Modbus RTU (RS 485)

Analog inputs

External room / return air temperature, Heat / Cool changeover, Operation mode changeover, Window contact on/off, Dewpoint monitor, Electrical heater enabled, Monitor input, Fault input

Analog inputs, number

2

Analog input, signal

NTC 3k , Switch

Relay outputs

Fan: N.O. contacts, non-floating, Valve: N.O. contacts, non-floating

Relay outputs, number

5

Relay output, switching voltage

AC 230 V

Relay output, switching current

5 (2) A

Mounting

Semi Flush-mounting with recessed rectangular conduit box, Fixing center 60.3 mm (BS4662)

Type of fixing

Recessed rectangular conduit box BS4662 (ARG71) with fixing centres of 60.3 mm

Degree of protection

IP30

Dimensions (W x H x D)

86 x 86 x 57 mm