Siemens POS8.4420/109 User manual

A6V11519429_en--_a
2019
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01
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28
Room operator units
POS8.4420/109; POS8.4440/109
Communicating room operator units with KNX PL
-
Link.
●Measurement of room temperature (POS8.4420/109)
●Measurement of room temperature and humidity (POS8.4440/109)
●Keys to adjust the room temperature setpoint, ventilation, domestic hot water,
scheduler settings depending on the controller application
●LCD display of room temperature, operating modes, humidity (only for
POS8.4440/109), scheduler, notification, and clock setting
●Operation with 8 pushbuttons
●2-wire interface to the controller via KNX PL-Link
●Power supply of the room operator unit via KNX PL-Link
●Backlit LCD display

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Use
●Measure and indicate the room temperature with POS8.4420/109
●Measure and indicate both room temperature and humidity with POS8.4440/109
●Switch different operating modes: Home, Away and Temporary
●Select different HVAC modes: Comfort, Economy, Unoccupied, and Protection
Application
The device communicates via controller on KNX PL-Link bus to access the controller's
preinstalled application:
●Heat recovery ventilation
Functions
Elements Functions
// Operating modes: Home / Away / Temporary
/ Temporary modes: Ventilation boost / Fireplace
// / HVAC modes: Comfort / Economy / Unoccupied / Protection
/ Auto / Manual
Manual
Ventilation
Temperature
Domestic hot water
Notification
Clock
/
General / Expert
/ Indicates an operable element
Wait
Start
List
Alarm (A-alarm) notification abnormal and unacknowledged
Alarm(A-alarm) notification normal and unacknowledged
Alarm (A-alarm) notification abnormal and acknowledged

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Elements Functions
Alarm (A-alarm) notification normal and acknowledged
Service (B-alarm) notification abnormal and unacknowledged
Service (B-alarm) notification normal and unacknowledged
Service (B-alarm) notification abnormal and acknowledged
Acknowledge all notifications
Reset
Confirm
Cancel
Go back
/ Exit / next
+ / - Increase / decrease
Add a switching point
Edit
Delete
1 2 3 4 5 6 7 1=Monday, 2=Tuesday, …, 6=Saturday, 7=Sunday
Time
Switch point
Scheduler bar
Read parameter
Outside temperature
Room temperature
Auxiliary input for Comfort
Auxiliary input for Economy
Auxiliary input for Unoccupied
Auxiliary input for Protection
Auxiliary input for Ventilation
Auxiliary input for fireplace
Auxiliary input for kitchen hood

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Mechanical design
1 Frame for panel mounting 4 KNX PL-Link bus connector
2 Base plate with
●screw holes for all common conduit boxes in
regions such as EU, UK, and so on.
●guide channels for wiring from center, up, or
bottom
5 Jack connector for tool connection
3 Room operator unit
Type summary
Product number Stock number Feature LCD display
with backlight
Min. order
size
Temperature sensor Humidity sensor
POS8.4420/109 S55625-H422-A100 Yes No Yes 20
POS8.4440/109 S55625-H444-A100 Yes Yes Yes 20
Equipment combinations
Type Type no. Document ID Description
Controller POS3.5715/100 A6V11417931 For HVAC control, switching
and monitoring functions
Controller POS3.3515/100 A6V11417931 For HVAC control, switching
and monitoring functions
Product documentation
Topic Title Document ID:
Installation, cable length, topology Mounting instructions A6V10733764
Engineering, commissioning, and operation Basic documentation A6V11471220
CE declaration CE declaration A6V11210253
Product environmental declaration Product environmental
declaration
A6V10733777
All documentation listed in the above table can be downloaded from:
http://siemens.com/bt/download.

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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.
Engineering
●The device offers plug and play functionality.
●The device is powered via the connected controller on the KNX PL-Link interface or the
jack connector.
NOTICE
De
-
energize the controller before wiring the device.
Mounting
●The devices are suitable for wall mounting or panel mounting.
●Recommended height: 1.50 m above the floor.
●Do not mount the devices in recesses, shelves, behind curtains or doors, or above or
near heat sources.
●Avoid direct solar radiation and drafts.

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●Seal the conduit box or the installation tube if any, as air currents can affect sensor
readings.
●Adhere to allowed ambient conditions.
For more information about mounting, see the Mounting instructions A6V10733764 .
Installation
CAUTION
The devices are not protected against accidental connection to AC 230 V.
●Use the correct cables for the KNX PL-Link bus.
●Do not interchange the wires of the KNX PL-Link cable.
●Observe all local installation regulations.
Commissioning
The device gets its applications from the connected controller by automatic commissioning.
During initial power-up using the KNX bus, commissioning begins automatically.
Operation
The application loaded in the connected controller determines device operation.
Operating mode:
●Auto mode
– The device always works as defined in the application.
– Users can change settings temporarily, such as heating temperature or the domestic
hot water setpoint.
●Manual mode
– Users can change operating settings, such as operating mode, heating and domestic
hot water setpoint, HVAC mode, etc.
●Temporary function
– There are two temporary modes: ventilation boost and fire place. When temporary
mode times out, the device returns to the previous mode. Tapping button 1 in
Temporary mode terminates Temporary mode and returns the device to Auto mode.
Parameter settings
The behavior of the device is configured via parameters. Long-press button 8 to open the
standard page to adjust settings for P01 to P05, and long-press buttons 6 and 8 to open the
expert page to adjust settings for P01 to P05 and P51.
More information about parameter descriptions, see Basic documentation (A6V11471220).
Scheduler settings
Users can use the scheduler to adjust the HVAC modes. For example, users can set the
device to run in Comfort mode from 9:00 to 17:00 and Economy mode from 17:00 to 19:00.
Long-press button 2 to open the scheduler settings page.
Maintenance
The device can be cleaned with off-the shelf, solvent-free cleaning agents.
Do not use mechanical aids (rough sponge or similar materials) – only a soft, damp cloth.

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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.

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Technical data
Power supply
Operating voltage KNX PL-Link DC 21...30 V
Max power consumption 7...10 mA
Interfaces
Type of port between controller and room
operator unit
KNX PL-Link
Baud rate 9.6 kbps
Protocol KNX PL-LINK
Standard KNX connector Wire diameter 0.8 mm, max. 1.0 mm (solid conductors only)
Cable type 2-core twisted pair, stranded, solid
Single cable length (from room automation station
to room operator unit)
<1000 m
Section 0.5…1.5 mm²
Bus line polarity PL+, PL-
Bus terminating resister not required
Sensor data
Temperature sensor Measuring element NTC resistance sensor
Measuring range 0...50 °C
Measuring accuracy (5...30 °C) ±0.8 °C
Measuring accuracy (25 °C) ±0.5 °C
Ambient conditions and protection classification
Housing protection
Protection standard as per EN 60529
●IP30
●IP33 for surface part
Insulation protection class Class III
Climatic ambient conditions
●Normal operation
●Transport
●Environmental conditions: Class 3K5
Temperature 0...50 °C
Air humidity <85% r.h.
●Environmental conditions: Class 2K3
Temperature -25...70 °C
Air humidity <95% r.h.
Mechanical ambient conditions
Normal operation
Transport
Class 3M2
Class 2M2
Standards, directives and approvals
EU conformity (CE) A6V11210253 *)
RCM conformity to EMC emission standard A6V11210257 *)
IC compliance CAN ICE-3(B)/NMB-3(B)
UL compliance UL916
FCC compliance Part 15 of the FCC rules. Operation is subject to the
following two conditions: 1) this device may not cause
harmful interference, and 2) this device must accept any
interference received, including interference that may
cause undesired operation.
Environmental compatibility The product environmental declaration
(A6V10733777 *) contains data on environmentally
compatible product design and assessments (RoHS
compliance, materials composition, packaging,

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Standards, directives and approvals
environmental benefit, disposal).
*) Documents can be downloaded at the following address:
http://siemens.com/bt/download
NOTICE
This equ
ipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy and, if not installed and
used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the device off and on, the user is
encouraged to try to correct the interference by one or more of the following measures:
●Reorient or relocate the receiving antenna.
●Increase the separation between the equipment and receiver.
●Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
●
Consult the dealer or an experienced r
adio/TV technician for help.
General data (POS8.4420/109)
Color Signal white (RAL9003)
Weight 145 g
General data (POS8.4440/109)
Color Signal white (RAL9003)
Weight 146 g

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Diagrams
Connection terminals
KNX PL-Link plug
Connector Pin Description
+KNX PL-Link (positive)
-KNX PL-Link (negative)
To find the location of the KNX PL-Link plug, refer to Mechanical design
NOTICE! Users can choose either pair of the pins to connect.
NOTICE
Wires are NOT interchangeable!
The device is protected against faulty wiring, but communication does not work on
interchanged wires. Do not connect the KNX / KNX PL-Link bus to the tool plug, only the
tool.
Tool plug
Connector Pin Description
+KNX PL-Link (positive)
-KNX PL-Link (negative)
Connection diagrams
Operation
R1 The device - room operator unit (POS8.44xx)
N1 The controller - room automation station
Twisted pair

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Issued by
Siemens Switzerland Ltd
Smart Infrastructure
Global Headquarters
Theilerstrasse 1a
CH-6300 Zug
Tel. [phone]
www.siemens.com/buildingtechnologies
© Siemens Switzerland Ltd, 2019
Technical specifications and availability subject to change without notice.
Document ID A6V11519429_en--_a
Edition 2019-01-28
Dimensions
Unit: mm
Dimensions for housing
Dimensions for mounting