Danfoss Basic Plus Data sheet
Data Sheet
S2
Basic Plus² Room Thermostat
Floor Heating with Modbus Communication
Application
WT-DM room thermostats are used for room temperature control in water-based floor heating systems.
By controlling room temperature in accordance
with the temperature desired by the user, the room
thermostats provide optimal energy savings while
upholding optimal thermal comfort in the room.
Functions
• Modern design with white backlight.
• AWAY function.
• Child safety lock.
• 3 selectable temperature control modes:
1. Room temp. control (default).
2. Room with floor temp. limit control.
3. Floor temp. control.
• 2 selectable floor temperature control modes:
1. High
2. Low
• Max. and min. limit settings for room and floor
temperature.
• Optional room temperature display when
power is OFF (default setting: no display).
• Floor sensor terminals. For thermostats
equipped with LCD display, enabling control of
maximum floor temperature and reducing the
risk of overheated and damaged floors (for specific maximum floor temperatures, refer to the
recommendations from floor suppliers).
• Frost protection mode. Use this feature instead
of turning the thermostat OFF completely to
protect against damages due to low temperatures. The room temperature will be maintained
around 5 °C.
• Temperature calibration. This function allows
you to change the temperature setpoint of the
room thermostat, to compensate for a possible
temperature deviation between the room thermostat and, for example, the centre of the room.
• Compatible with Smart House System or BMS
with RS485 interface. It is possible to realize re-
mote central control.
Ordering
Accessories
Wiring connections
© Danfoss | FEC | 2021.06
Product Typ e Supply voltage Output voltage Code no.
Basic Plus2 WT-DM Display WT-DM 230 V AC 230 V AC 088U0627
Product Typ e Code no.
BasicPlus floor sensor FH-CWF 088U0610
S1
B-
A+
N
NC
NO
L
Floor Sensor
Modbus Communication
230 V ~
AI195086470199en-010102 | 1
Technical specifications
ErP
1
86,0
86,0
24,516,0
62,3
46,2
Feature WT- DM
Typ e LCD display with push buttons
Operating room temperature Off, 5 °C to 35 °C
Operating floor temperature Off, 20 °C to 45 °C
Ambient temperature −10 °C to +60 °C
Fault indication Yes
Hysteresis 1 °C, symmetrical around the setpoint temperature
LCD backlight Yes, white
Max. load, inductive < 1 A
Max. load, resistive < 3 A
Temperature calibration Yes (+/− 10 °C)
Power consumption 2 W
Power supply 85-250 V AC, 50/60 Hz
Sensor, room NTC 100K, accuracy: ±1 %
Sensor, floor Optional (FH-CWF)
Communication protocol Modbus RTU
Communication interface RS485
Shell material ABS, non-inflammable
IP class 30
Dimensions
ErP class
Approval CE marking, EN 60730
Colour White RAL9010/Dark Grey RAL7024
Dimensions 86 × 86 × 16 mm
0
(1%)
2 | © Danfoss | FEC | 2021.06
AI195086470199en-010102
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