Siemens POS8.4420/109 User manual

A6V11519429_en--_b
2020-10-14
Room operating unit
POS8.4420/109; POS8.4440/109
Communicative room operating units with KNX PL-Link.
●Measurement of the room temperature (POS8.4420/109)
●Measurement of the room temperature and humidity (POS8.4440/109)
●Keys for adjustment of the room temperature setpoint, ventilation, domestic hot
water, time scheduler settings depending on the controller application
●LCD display of room temperature, operating modes, humidity (only for
POS8.4440/109), time scheduler, notification, and clock setting
●Operation with 8 push buttons
●2-wire interface to the controller through KNX PL-Link
●Power supply of the room operating unit over KNX PL-Link
●LCD display with backlight

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

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Elements
Functions
Alarm (A-alarm) notification abnormal and acknowledged
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 switch point
Edit
Delete
1 2 3 4 5 6 7
1=Monday, 2=Tuesday, …, 6=Saturday, 7=Sunday
Time
Switch point
Time scheduler bar
Read parameter mode
Outside temperature
Room temperature
Auxiliary input for comfort mode
Auxiliary input for economy mode
Auxiliary input for unoccupied mode
Auxiliary input for protection mode
Auxiliary input for ventilation boost mode
Auxiliary input for fire place mode
Auxiliary input for kitchen hood mode

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Building Technologies
2020-10-14
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 operating unit
Type summary
Product number
Stock number
Feature
LCD display
with backlight
Minimal
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 controlling,
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.
Notes
Security

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2020-10-14
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 receives their power from the connected controller via the KNX PL-Link
interface or from the jack connector.
NOTICE
De-energize the controller before wiring the device.
Mounting
●The devices are suitable for wall mounting and 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.
●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

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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 applications from its connected controller by automatic commissioning.
When it is powered up using the KNX bus for the first time, it performs the commissioning
procedure automatically.
Operation
The operation of the device is defined by the application loaded in the connected controller.
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: fan boost and fire place. When temporary mode
times out, the device returns to its previous mode. Tap button 1 during the temporary
mode running time terminates the temporary mode and the device returns to the auto
mode.
Parameter settings
The behavior of the device can be configured by setting parameters. Long press button 8 to
enter the standard page to adjust settings for P01 to P05 and long press button 6 and 8 to
enter the expert page to adjust settings for P01 to P05 and P51.
More information about parameter descriptions, see the Basic documentation
(A6V11471220).
Time scheduler settings
Users can use the time scheduler to adjust the settings for HVAC modes. For example,
users can set the device to run under Comfort mode from 9:00 to 17:00 and Economy mode
from 17:00 to 19:00. Long press button 2 to enter the time 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.
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.

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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 operating 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 operating 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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2020-10-14
Standards, directives and approvals
environmental benefit, disposal).
*) Documents can be downloaded at the following address:
http://siemens.com/bt/download
NOTICE
This equipment 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 radio/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 communications does not work on
interchanged wires. The KNX / KNX PL-Link bus MUST NOT be connected to the tool plug,
only the tool.
Tool plug
Connector
Pin
Description
+
KNX PL-Link (positive)
-
KNX PL-Link (negative)
Connection diagrams
Operation

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R1
The device - room operating unit (POS8.44xx)
N1
The controller - room automation station
Twisted pair

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Building Technologies
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Issued by
Siemens Switzerland Ltd
Building Technologies Division
International 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--_b
Edition
2020-10-14
Dimensions
Unit: mm
Dimensions for housing
Dimensions for mounting