Siemens RDF300

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Semi-Flush Mount Room Thermostat. Suitable for 2 or 4 pipe fan coil units or single stage DX cooling and heating.

Maintain room temperature via built-in temperature sensor or external room temperature / return air temperature sensor
Automatic or manual changeover between heating and cooling mode
Select applications via DIP switches
Select operating mode via the operating mode button on the controller
Single or 3-speed fan control (automatic or manual)
Display current room temperature or setpoint in °C and/or °F
Minimum and maximum setpoint limitation
Keypad lock (automatic and manual)
Two multifunctional inputs, freely selectable for:
- Operating mode switchover contact (key card)
- Automatic heating/cooling changeover sensor
- External room temperature or return air temperature
- Dewpoint sensor
- Electrical heater enable
- Alarm input

Attribute	Value
Operating voltage	AC 230 V
Frequency	50/60 Hz
Power consumption	8 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
Analog inputs	External room / return air temperature, Heat / Cool changeover, Operation mode changeover, Window contact on/off, Dewpoint monitor, Electrical heater enabled
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	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