Operating Instructions

Siemens Smart Infrastructure A6V12060783_en--_b A5W00123793A_AB 2021-05-11 1/2
Mounting Instructions
RDF660MB..
Flush
-
mounted
r
oom
t
hermostat
with RS485 Modbus
communications
Installation video Datasheet
Mounting location
Factory setting
RDF660MB
X1 3 = Window contact (DI)
X2 1 = External temperature sensor (AI)
RDF660MB/MM
B1 9 = H/C changeover (DI)
S1 3 = Window contact (DI)
Wiring diagrams
Application
2-pipe fan coil, on/off valve output with DC fan
2-pipe fan coil, on/off valve, and electric heater outputs with DC
fan
4-pipe fan coil, on/off valve outputs with DC fan
Key
N1 RDF660MB/MM, RDF660MB
M1 ECM fan
V1, V2 Valve
C1, C2 Compressor
S2 Operating mode switch-over
contact (e.g. key card)
B2 External room / return air
temperature sensor
E1 Electrical heater
2-pipe fan coil, 3-pos valve outputs with DC fan
No function
DIP
switches
Dimensions (mm)
Mounting
Dismounting