Siemens RDF870KN User manual

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Touch Screen Flush-Mounted PM2.5 & IAQ Controllers With
KNX or RS485 Modbus
RDF870KN.. and RDF870MB..
PM2.5 control, CO2 control, or both and ventilation applications
RDF870KN (KNX) and RDF870MB (Modbus) controllers:
●AC 230 V operating voltage, large, backlit display
●Display and setpoint adjustment for PM2.5 and CO2control
●Display of room temperature, outside temperature, VOC (volatile organic compound) and
r.h. (relative humidity)
●Supports 1-/3-/4-speed On/Off fan or DC fan output
●Two multifunctional inputs for external passive and DC 0…10 V sensors
●Operating modes: Comfort, Economy and Protection
●KNX S-Mode for RDF870KN
●KNX commissioning via ETS or local control parameters
●KNX integration into Desigo via group (ETS) or individual addressing
●KNX integration into third-party system via group addressing (ETS)
●RS485 Modbus RTU slave mode for RDF870MB
●Modbus commissioning via third-party tool, e.g. Modbus scan, Modbus poll, etc.
RDF870MB can be configured as a room unit via DIP switches and it provides the following
additional functions:
●Setpoint adjustment and display for room temperature, VOC, RH and display of outside
temperature
●Four external outputs via bus and controlled by a master controller
Mounting on recessed square 86 mm box or round 60 mm with 60 mm fixing centers and min-
imum 40 mm depth

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Use
Ventilation control in purifier systems:
Typical applications:
●Residential apartments
●Commercial buildings
●Schools/Universities
●Hospitals/Healthcare centers
Local and remote configuration via one of the following:
●Local HMI
●DIP switch selection: room controller or room unit RDF870MB only
●Third-party tool Modbus poll/Modbus scan RDF870MB only
●ETS RDF870KN only
Functions
For room controllers
●Maintain PM2.5 or CO2level or both via controlling a fan of fresh air units or air purifiers
●Display of room temperature via built-in temperature sensor or bus
●Setpoint adjustment for PM2.5 and CO2only
●PM2.5 and CO2values are received from external sensor or via bus.
●CO2control has higher priority than PM2.5 control if both controls are available.
For room unit
●Display room temperature via built-in sensor in °C
●Display outside temperature via bus or outside sensor input in °C
●Display PM2.5 via bus or outside sensor input in μg/m3
●Display CO2via bus or outside sensor input in ppm
●Display VOC via bus or outside sensor input in mg/m3or %
●Display relative humidity via bus or outside sensor input in % r.h.
●Setpoint adjustments for all of the above
Common functionalities
●Selection of operating modes
●Minimum and maximum setpoint limitation
●Fan speed adjustment: Auto, manual (up to 4 speeds)
●Reload factory settings for commissioning, engineering mode and control parameters
Mechanical design
The room controller/room unit consists of the following parts:
●Front panel with electronics, operating elements and built-in room temperature sensor
●Mounting base with power electronics
●Mounting frame is an additional part to complete the installation for RDF870…

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Status symbols
Screen lock
Heating mode
Alarm/service reminder
Valve on
Manual override
Cooling mode
Protection mode
Ventilation mode
Auxiliary heating active
Auto fan mode
Economy mode
Timer
Selection symbols
Room temperature
VOC mode
Outdoor temperature
CO2mode
PM2.5 mode
Relative humidity
Operation
Display

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Operational icons
Increment, decrement or selection
Selection, change or move to previous or next items
Display values, relative humidity or parameter values, etc.
Secondary display, parameters, password / filter hours
Setpoint mode
Fan mode or fan speed mode
Operating mode
More functions or info
Type summary
Product no.
Stock no.
Operating
voltage
Control outputs
Suitable for
On/Off
DC 0…10 V
RDF870KN
S55770-
T407
AC 230 V
4 1)
1
Square or round
conduit box
RDF870MB
S55770-
T408
AC 230 V
4 1)
1
Square or round
conduit box
1) On/Off output with potential free input from AC 230 V
Ordering
●When ordering, indicate product number, SSN and name.
e.g. RDF870KN (S55770-T407) room controller
●Order sensors separately.
Equipment combinations
Type of units
Product number
Data sheet*)
Room sensor for detection of
PM2.5
3-color LED service
indication
QSA2700
A6V11160938
Room sensor with LCD
display for detection of
PM2.5
2.4-inch color LCD screen
for PM2.5 values, air quality
index, and service
QSA2700D
A6V11160938
Sensors

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Type of units
Product number
Data sheet*)
Duct air quality sensor CO2/
temperature / rel. humidity /
VOC
QPM1100,
QPM2100,
QPM2102
N1962
Duct air quality sensor CO2/
temperature / rel. humidity /
VOC
QPM2102D
N1962
Duct air quality sensor CO2/
temperature / rel. humidity /
VOC
QPM2160,
QPM2180
N1962
Duct air quality sensor CO2/
temperature / rel. humidity /
VOC
QPM2160D,
QPM2162D
N1962
*) All documents can be downloaded from https://www.downloads.siemens.com/download-
center.
Product documentation
Title
Document ID:
Operating instruction
A6V11439451
CE declaration
A5W90010366 (RDF870KN)
A5W90010367 (RDF870MB)
Environmental product declaration
A6V11625786
Related documents such as environmental declarations, CE declarations, etc., can also be
downloaded at the following Internet address:
http://siemens.com/bt/download
Notes
Security
CAUTION
National safety regulations
Failure to comply with national safety regulations may result in personal injury and property
damage.
●Observe national provisions and comply with the appropriate safety regulations.

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Engineering
See the product documentation for information on engineering, selection and sizing connect-
ing cables for supply voltage and field devices.
Mounting and installation
Mount the room controller on a conduit box. Do not mount on a wall in niches or between
bookshelves, behind curtains, above or near heat sources, wind outlets or inlets, and do not
expose to direct solar radiation. Mount about 1.5 m above the floor.
●Do not apply excessive force to screws! Deformation of the mounting frame may result in
improper connections and faulty operation.
●Mount the room controller in a clean, dry indoor place without direct airflow from a heat-
ing/cooling device, not exposed to drips or splash water.
●Before removing the front cover, disconnect the power supply.
WARNING
No internal line protection for supply lines to external consumers
Risk of fire and injury due to short-circuits
●Adapt the line diameters as per local regulations to the rated value of the installed fuse.
See Operating Instruction for the installation instructions enclosed with room controller.
●Comply with local regulations to wire, protect and earth the room controller.
●The device has no internal fuse for supply lines to fan and actuators. To avoid risk of fire
and injury due to short-circuits, the AC 230 V mains supply line must have a circuit
breaker with a rated current of no more than 10 A.
●The wiring cross section used for power supply (L, N) and 230 V outputs (Qxx - N) must
be adapted to the preceding overload protection elements (max. 10 A) under all circum-
stances. Always comply with local regulations.
●Properly size the cables to the room controller and valve actuators for AC 230 V mains
voltage.
●Cables of SELV inputs X1-M / X2-M: Use cables with min. 230 V insulation, as the con-
duit box carries AC 230 V mains voltage.
●Inputs X1-M or X2-M of different units (e.g. temperature sensor) may be connected in
parallel with an external switch. Consider overall maximum contact sensing current for
switch rating.
●KNX communication cables (input CE+ / CE-): Use cables with Min. 230 V insulation, as
the conduit box carries AC 230 V mains voltage. (Only for RDF870KN)
●When a KNX bus power supply is connected on the line with communicating room con-
troller and Synco controllers, the internal KNX power supply of the Synco controllers
must be switched off. (Only for RDF870KN)
Mounting
Wiring

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●Isolate the cables of Modbus communication input A+, B- and REF for 230 V. (Only for
RDF870MB)
●No cables are provided with a metal shield.
●Disconnect from supply before opening the cover.
Commissioning
After powering up, all LCD segments light up for about three seconds before the room con-
troller enter its normal states.
Address and application can be downloaded via ETS by pressing and holding for more
than five seconds to enter programming mode. (Only for RDF870KN)
The room controller and room unit can be set via DIP switches. (Only for RDF870MB)
DIP switch configuration
DIP switch positions
Application
1
2
ON
OFF
Room unit
OFF
OFF
Room controller
DIP switch setting applies to RDF870MB only.
Current factory setting for PM2.5 control with 3 speed on/off fan application is as follows:
●APP= 1: PM2.5 control only
●DISP: Room temp= 1; PM2.5= 1
●SEN1= 3: PM2.5 (AI) μg/m3(0…10 V)
●SEN2= 0: no function
●FAN= 3: 3 speed fan

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Software version (RDF870KN)
Two different software versions of RDF870KN are available:
●RDF870KN with software version
(U101):
Related ETS5 file
(RDF870KN_v1d0_ETS5.knxprod)
●RDF870KN with software version
(U103):
Related ETS5 file
(RDF870KN_v1d1_ETS5.knxprod)
The software version can be checked as follows:
●The software version relates to production date (DDMMYYYY) on the individual package
label or printed on the rear of the product.
E.g. "DDMMYYYY = 02062019" equals to "02 June 2019"
–If YYYY = 2018, 2019 or 2020, RDF870KN software version is "U101".
–IF YYYY = 2021 onwards, RDF870KN software version is "U103".
●Checked under parameter mode:
–Enter password 9999 after accessing parameter mode. For parameter mode access,
see Parameter mode user access [19].
–When first parameter appears, press and hold until "SW" is displayed. Then relat-
ed software version is shown as "U101" or "U103".
For further support, please raise a support request via site:
https://support.industry.siemens.com/cs.
Disposal
The device is considered an electronic device for disposal in accordance
with the European Guidelines and may not be disposed of as domestic
garbage.
●Dispose of the device through channels provided for this purpose.
●Comply with all local and currently applicable laws and regulations.
Warranty
Technical data on specific applications are valid only together with Siemens products listed
under "Equipment combinations". Siemens rejects any and all warranties in the event that
third-party products are used.
Note

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Technical data
Power supply
Operating voltage
AC 230 V
Frequency
50/60 Hz.
Power consumption
Max. 7.0 VA / 2.5 W
CAUTION
On internal fuse.
External preliminary line protection with max. C 10 A circuit breaker required in all cases.
Multifunctional input X1-M/X2-M
Temperature sensor input:
Type
Temperature range
Accuracy
Calibration range
NTC 10k
0…50 °C (32…122 °F)
±0.5 K at 25 °C (77 °F)
-5 K…5 K, resolution 0.5 K
Digital Input:
Logic states
Insulation against mains voltage (SELV)
Cable length
Selectable NO/NC
≥3.75 kV, reinforced insulation
Up to 80 m (wire diameter of 1.5 mm2))
Analog input
Signal type
Sensor range and limit
Cable length
0…10 V, NTC 10k
Set by parameters
Up to 80 m (wire diameter of 1.5 mm2))
Function of inputs
PM2.5 sensor, CO2sensor, VOC sensor,
humidity sensor, alarm input
Selectable
X1: SEN1
X2: SEN2
Output
3/4 speed fan
Type
Voltage
Maximum current
Q1…Q4
On/Off
AC 230 V
5(2) A
ECM fan
Type
Voltage
Maximum current
Y50
Modulating
DC 0…10 V
5.0 mA
CAUTION
If fans must be connected in parallel, connect one fan directly, for additional fans, one relay
for each speed.

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KNX interface
KNX type
Bus current
KNX TP1-64, galvanic isolation.
5 mA
Modbus interface
Modbus type
Transmit mode
Connection
Baud rate
Modbus address
Cable length
Identity
Transmission format (start bit –data –parity
–stop)
RS485
RTU
Support up to 32
9600, 19200 (default), 38400
1-247, 1 (default)
Max.1200 meters
Slave
0 = 1-8-E-1 (default) / 1 = 1-8-O-1 / 2 = 1-8-
N-1 / 3 = 1-8-N-2
Wiring connections
Diameter
Wire
1.5 mm2
Solid or stranded
Ambient conditions and protection classification
Classification as per EN 60730
Function of automatic control devices
Degree of contamination
Overvoltage category
Type 1
2
III
Design type
Device suited for use with equipment of
safety class II.
Degree of protection of housing to EN 60529
Room automation station
With terminal cover
IP30.
IP30.
Climatic ambient conditions
Transport (packaged for transport) as per
EN 60721-3-2
Operation as per EN 60721-3-3.
Class 2K3
Class 3K5 1)
Mechanical ambient conditions
Transport as per EN 60721-3-2
Operation as per EN 60721-3-3
Class 2M2.
Class 3M2.
1) No condensation is allowed.
Standards, directives and approvals
Electromagnetic compatibility
For residential, commercial, and industrial
environments
EU conformity (CE)
A5W90010366 (RDF870KN) *)
A5W90010367 (RDF870MB) *)

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Standards, directives and approvals
RCM conformity
A5W90010386 (RDF870KN) *)
A5W90010387 (RDF870MB) *)
REACH
Regulation (EC) No 1907/2006 Registration,
Evaluation, Authorisation and Restriction of
Chemicals (REACH)
RoHS
Directive 2011/65/EU restriction of the use of
certain harzardous substances in electronic
equipment
Environmental compatibility
The product environmental declaration
(A6V11625786 *) contains data on
environmentally compatible product design
and assessments (RoHS compliance,
materials composition, packaging,
environmental benefit, disposal).
General
Weight without/with package
165 g / 265 g
Housing front color
Ivory white
Housing flammability class according to
UL94
V-0
*) The documents can be downloaded from http://siemens.com/bt/download.

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Diagrams
Connection terminals
RDF870KN
RDF870MB
X1
Multifunction input 1
M
Input reference ground for X1, X2 and Y50
X2
Multifunction input 2
Y50
DC 0…10 V output
CE+, CE-
KNX bus + and - terminals
REF
Modbus reference ground
A+, B-
Modbus + and - terminals
L, N
AC 230 V operating voltage
Q1
Output, fan speed 1, AC 230 V
Q2
Output, fan speed 2, AC 230 V
Q3
Output, fan speed 3, AC 230 V
Q4
Output, fan speed 4, AC 230 V

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Connection diagrams
RDF870KN
Single fan
3-speed fan
4-speed fan
ECM fan
RDF870MB (room controller)
Single fan
3-speed fan
4-speed fan
ECM fan

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RDF870MB (room unit)
L, N
AC 230 V operating voltage
X1, X2
Multifunctional inputs 1 & 2 (sensor, alarm, etc.)
M
Input reference ground for X1, X2 and Y50
CE+, CE-
KNX bus + and - terminals
Q1, Q2, Q3, Q4
Four speeds fan output (relay output)
Y50
DC 0…10 V output
REF
Modbus reference ground
A+, B-
Modbus + and - terminals
M1
1-speed, 3-speed or 4-speed fan, DC 0...10 V fan

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Application examples
CO2 application (single duct single fan)
Single duct single fan fresh air unit or purifier with built-in PM2.5 filter
Basic parameter settings: APP = 3, DISP (CO2= 1), SEN1 =4, FAN =1-/3-/4-speed
on/off fan or ECM fan
RDF870… unit can be set up as a CO2controller with an external CO2sensor connected to
X1 to control the fan for a fresh air unit (i.e. single duct single fan fresh air unit with/without
PM2.5 built-in filter).
The fan speeds are switched as per the actual CO2level and the CO2setpoint.
The built-in PM2.5 filter already purifies the outside air before entering indoors.

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PM2.5 application (single duct single fan)
Single duct single fan purifier with built-in PM2.5 filter
Basic parameter settings: APP = 1, DISP (PM2.5 = 1), SEN1 =3, FAN =1-/3-/4-speed
on/off fan or ECM fan
RDF870... unit can be set up as a PM2.5 controller with an external PM2.5 sensor connected
to X1 to control the fan for a PM2.5 purifier unit (i.e. single duct single fan purifier with PM2.5
built-in filter).
The purifier is not connected to external but installed on the ceiling. The purifier circulates in-
door through its built-in PM2.5 filter. The fan speeds are switched as per the actual PM2.5
level and the PM2.5 setpoint.

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CO2 application (dual duct parallel connected fan)
Dual duct parallel connected fan fresh air unit or purifier with built-in PM2.5 filter
Basic parameter settings: APP = 3, DISP (CO2= 1), SEN1 =4, FAN =1-/3-/4-speed
on/off fan or ECM fan
RDF870… unit can be set up as a CO2controller with an external CO2sensor connected to
X1 to control the fan operation of a fresh air unit (i.e. dual duct parallel connected fan fresh
air unit with/without PM2.5 built-in filter).
The fan speeds are switched as per the actual CO2value and the CO2setpoint.
The built-in PM2.5 filter already purifies the outside air before entering indoors.
This fresh air unit operates in similar way as per single duct type. With the dual duct type, air
exchange performance is better.
CAUTION
If fans must be connected in parallel, connect one fan directly, for additional fans, one relay
for each speed.

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PM2.5 & CO2 room unit application (dual duct independent fan control together with a master controller)
Dual duct independent fan fresh air unit or purifier with built-in PM2.5 filter via by-pass
damper
Basic parameter settings: APP = 2, DISP (PM2.5 = 1, CO2= 1), SEN1 = 3, SEN2 = 4,
FAN1 & FAN2 =1-/3-speed on/off fan
RDF870... unit can be set up as a controller combining PM2.5 and CO2control with an ex-
ternal PM2.5 and CO2sensors connected to X1 and X2 respectively to control the fan for a
fresh air unit and purifier (i.e. dual duct independent fan fresh air unit with PM2.5 built-in filter
via by-pass damper). The damper can be disabled (inlet open and by-pass close) or enabled
(by-pass open) via an extra damper input from a master controller.
When the by-pass damper is inactive, the outside air can enter the room via the inlet that is
controlled by a master. The fan speeds are switched as per the actual CO2level and the CO2
setpoint.
When the by-pass damper is active via control input from a master controller, the inlet is dis-
abled by the master controller and outside air is blocked. As a result, all the exhaust air (or
partially) will be forced to flow via the by-pass PM2.5 filter and return to the room –air circu-
lates internally. The fan speeds are switched as per the actual PM2.5 level and the PM2.5
setpoint.
If both fans have same fan speed, airflow circulates internally. However, two fans also can
be operated at different speeds to generate different air pressures internally.

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Parameters
Parameter mode user access
1. Touch & hold icon > 5 s
2. Enter first password via or
PAS: Password
Factory: 00 00
3. Enter second password via or
Note: Press the Setting icon
to exit or re-enter the
password if not correct
4. After 6 seconds
P: Successful login
F: Failed login
5. Edit parameters
Value of current selected
parameter
Decrement or Previous
available value
Increment or Next available
value
Previous parameter
current selected Parameter
Next parameter
6. Exit parameter mode
Touch the setting mode icon
to exit
NOTE:
Passwords can be modified
via both HMI and system.

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Engineering parameters
Item
Description
Range
Factory settings
MODA
Modbus address setting
1…247
1
MODB
Modbus baud rate setting
1: 9600 bps
2: 19200 bps
3: 38400 bps
2: 19200 bps
MODF
Modbus data frame format
0: 1/8/E/1
1: 1/8/O/1
2: 1/8/N/1
3: 1/8/N/2
0: 1/8/E/1
APP
Application selection
1: PM2.5 control only
2: PM2.5 + CO2control
3: CO2control only
4: Ventilation
1: PM2.5 control only
DISP
Symbol display enable/disable
0: Disable display
1: Enable display
1) Room temp= 1;
2) Outside temp= 0;
3) PM2.5= 1;
4) VOC= 0;
5) CO2= 0;
6) RH= 0;
SEN1 1)
External sensor1 type selection
0: No function
1: Temperature (AI) (NTC 10k)
2: Temperature (AI) (0…10 V)
3: PM2.5 (AI) μg/m3 (0…10 V)
4: CO2(AI) ppm (0…10 V)
5: VOC (AI) % (0…10 V)
6: VOC (AI) mg/m³ (0…10 V)
7: R.h. (AI) % (0…10 V)
8: Alarm input (DI)
9: Dummy AI (0…10 V) (RU only)
10: Dummy DI (RU only)
3: PM2.5 (AI) μg/m3
(0…10 V)
DIL1
Control action if digital input
0: Normally open / Open
1: Normally closed / Closed
0: Normally open / Open
SEN2 1)
External sensor2 type selection
0: No function
1: Temperature (AI) (NTC 10k)
2: Temperature (AI) (0…10 V)
3: PM2.5 (AI) μg/m3 (0…10 V)
4: CO2(AI) ppm (0…10 V)
5: VOC (AI) % (0…10 V)
6: VOC (AI) mg/m³ (0…10 V)
7: R.h. (AI) % (0…10 V)
8: Alarm input (DI)
9: Dummy AI (0…10 V) (RU only)
10: Dummy DI (RU only)
0: No function
DIL2
Control action if digital input
0: Normally open / Open
1: Normally closed / Closed
0: Normally open / Open
PMH
PM2.5 sensor high range
Max. of low range…1000
500
PML
PM2.5 sensor low range
0…Min. of high range
0
CO2H
CO2sensor high range
Max. of low range…2000
2000
CO2L
CO2sensor low range
0…Min. of high range
0
UOCH
VOC sensor high range
Max. of low range…100
5
UOCL
VOC sensor low range
0…Min. of high range
0
HUMH
Humidity sensor high range
Max. of low range…100
100
HUML
Humidity sensor low range
0…Min. of high range
0