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Technical data
Power supply
Caution
Outputs
Caution
Inputs
KNX bus
Operational data
20 / 24
Siemens
Building Technologies
Rated voltage
Overvoltage category
Frequency
Power consumption
No internal fuse.
External preliminary protection with max C 10 A circuit breaker required in all cases.
Control output Q11, Q12, Q14 (SPDT)
Rating Min, Max resistive (inductive)
No internal fuse.
External preliminary protection with max C 10 A circuit breakers in the supply line
(Q11) required in all cases.
Multifunctional input X1-M/X2-M
Temperature sensor input:
Type
Temperature range
Cable length
Digital input:
Operating action
Contact sensing
Parallel connection of several thermostats
for one switch
Insulation against mains voltage (SELV)
Function of inputs:
External temperature sensor, window contact, fault
contact, monitoring input
Interface type
Bus current
Bus topology: See KNX manual (Reference documentation, see below)
Switching differential, adjustable
Heating mode
Setpoint setting and range
Comfort
Economy
Protection
Multifunctional input X1/X2
Input X1 default value
Input X2 default value
Built-in room temperature sensor
Measuring range
Accuracy at 25 °C
Temperature calibration range
Settings and display resolution
Setpoints
Current temperature value displayed
Built-in room humidity sensor
Measuring range
Accuracy at 25 °C
Humidity calibration range
Settings and display resolution
Display resolution
RDF880KN...
Touch Screen Flush-mount Room Thermostats with KNX Communications
AC 230 V
III
50/60 Hz
Max. 6.0 VA / 2.1 W
AC 24...230 V
Min. 10 mA, Max. 5(2) A
See "Equipment combinations"
0...49 °C
Max. 80 m
Selectable (NO / NC)
SELV DC 0...5 V / Max. 5 mA
Max. 20 thermostats per
switch
4 kV, reinforced insulation
Selectable
X1: P38
X2: P40
KNX, TP1-64
(electrically isolated)
5 mA
(P30)
1 K (0.5...6 K)
(P08)
21 °C
(5...40 °C)
15 °C
(OFF, 5...40 °C)
(P11)
8 °C
(OFF, 5...40 °C)
(P65)
Selectable 0, 1, 3, 6, 7, 8
(P38)
0 (no function)
(P40)
0 (no function)
0...49 °C
< ± 0.5 K
± 5.0 K
0.5 °C
0.5 °C
0...100%
± 5% r.h.
± 20%
1% r.h.
A6V11282546_en--_a
2018-04-19
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