Siemens Desigo PXC4.E16 User manual

Desigo™
Automation stations
PXC4.E16
For the control of primary plants
● Compact automation station for HVAC and building control systems,
freely programmable using graphical programming interface
● Communication BACnet/IP (BTL certified)
● 2-port Ethernet switch for low-cost cabling
● 16 inputs/outputs: 12 universal inputs/outputs, 4 relay outputs
Extendable via I/O modules TXM…
● Integration of Modbus data points via RTU and / or TCP
● WLAN interface for engineering and commissioning
● Operating voltage AC24V
● Mounted on standard rails or on the wall
● Plug-in screw terminal blocks
A6V11646018_en--_e Smart Infrastructure
2021-06-11

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Type summary
Type Order number Description
PXC4.E16 S55375-C100 Compact automation station for BACnet/IP with Modbus
PXC4.E16S S55375-C108 Compact automation station for BACnet/IP
Inputs/outputs
PXC4.E16 PXC4.E16S
Number of inputs/outputs (Onboard) 16 16
Number of universal inputs/outputs (UIO) 12 12
Number of relay outputs (DO) 4 4
Number of inputs/outputs (Onboard + TXM) 40 40
Number of Modbus data points TCP and/or RTU 40 0
UIO Universal inputs/outputs support the following signal types:
● Passive sensors LG-Ni 1000, 2x LG-Ni1000, Pt 1000 (*75, 385), NTC 10k, NTC 100k
● Resistance sensors 1000 Ohm, 2500 Ohm, 2650 Ohm, 1000...1175 Ohm (for setpoint shift)
● Active sensors DC 0 ... 10 V
● Current measurement analog DC 0...20 mA or 4...20 mA, (inputs U1, U2, U7, U8)
● Binary potential-free contacts for signaling functions
● Counter to 25 Hz (electronic switch to 100 Hz)
● Analog outputs DC 0…10 V
DO Relay outputs for binary controls, changeover contact
(NO, NC, pulse)
System functions
PXC4.E16 PXC4.E16S
Number of Modbus RTU devices in field level network per
PXC4.E16
Up to 31 0
Equipment combinations
I/O modules TXM (Series D and later)
Description Type Data sheet
Digital input module 8 or 16 I/O points TXM1.8D, TXM1.16D CM2N8172
Universal module without / with local operation and LCD TXM1.8U, TXM1.8U-ML CM2N8173
Super universal module without / with local operation and LCD TXM1.8X, TXM1.8X-ML CM2N8174
Relay module without / with local operation TXM1.6R, TXM1.6R-M CM2N8175
Resistance measuring module (for Pt100 4-wire) TXM1.8P CM2N8176
Triac module TXM1.8T CM2N8179
Digital input and relay module TXM1.4D3R CM2N8188
PXC4 can power TXM extensions modules (for details see planning overview
A6V11973797).

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Desigo Control Point
Description Type Data sheet
BACnet touch panels with integrated Web server
7.0"
10.1"
15.6"
PXM30.E
PXM40.E
PXM50.E
A6V11664137
Client Touch Panels with data storage in Web server PXG3.Wx00-1:
7.0"
10.1"
15.6"
PXM30-1
PXM40-1
PXM50-1
A6V11664139
BACnet/IP Web server with standard functionality
BACnet/IP Web server with extended functionality
PXG3.W100-1
PXG3.W200-1
A6V10808336
System controller
Description Type Data sheet
System controller to integrate Modbus and MS/TP devices PXC5.E003 A6V11646020
Functions
Automation stations for HVAC and building control systems.
● System functions (alarming, scheduling, trending, access protection with individually
definable user profiles and categories)
● Freely programmable (close resemblance to CEN standard 11312). All function blocks,
available in libraries, can be graphically connected.
● Engineering and commissioning with the ABT Site Tool using graphical function charts
● BTL tested BACnet communication, in compliance with the BACnet standard including B-
BC profile (Rev. 1.15)
● Generic object viewer for device local data points via an embedded web-based interface
● Wireless connection for engineering and commissioning
● Cloud connectivity for remote access
● PXC4.E16: Integration of Modbus data points via RTU and/or TCP
● Direct connection of field devices

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Technical and mechanical design
The compact build allows for mounting the devices on a standard rail or a wall.
45 6
15 1413
10 12
1
3
2
7
9
8
11
16
Date/Series
S/N
WLAN
Default
4 2-port Ethernet switch with 2 LEDs per port for
display purposes
5 PXC4.E16: Plug-in terminal block with screw
terminals
KNX, PL-link, for future use
6 Plug-in terminal block with screw terminals
Power supply
7 Plug-in terminal blocks with screw terminals
Universal inputs/outputs, field device supply
8 Connector for I/O modules TXM
9 Plug-in terminal block with screw terminals
Relay outputs
10 PXC4.E16: Plug-in terminal block with screw
terminals
COM, Modbus RTU
11 PXC4.E16: DIP switch for bus termination and
polarization COM
12 Slider for mounting on DIN rails
13 Eyelets for cable ties
1 Plastic housing 14 Holes for wall mounting
2 Service button (identification in the network and
WLAN on/off)
15 Date / Series and Serial number
3 LEDs for communication and state 16 QR code for default WLAN access
Description see Technical data

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LED displays
Activity LED Color Activity Function
Ethernet 1/2 Green Continuously ON
Continuously OFF
Flashing
Link active
No connection
Network traffic
Yellow Continuously ON
Continuously OFF
Link 100
Link 10 Mbps
RUN Green Continuously ON
Continuously OFF
Flashing
Device operational
Device not operational
Start-up or program halted
Red Continuously OFF
Continuously ON
Rapid flashing
OK
HW or SW fault
Firmware or application missing/corrupted
Blue Continuously ON
Continuously OFF
Connection to the cloud OK
No connection to the cloud
COM TX
(PXC4.E16)
Yellow Flashing
Continuously OFF
Communication
No communication to subsystem
COM RX
(PXC4.E16)
Yellow
SVC Red Continuously OFF
Flashing
OK
Device is not configured
Flashing per wink
command
Identification of the device after receipt of
wink command
2s 1s
5 Hz 5 Hz
2s 1s
WLAN Blue Steady OFF
Steady ON
Flashing
WLAN inactive
WLAN active and at least one WLAN client
connected
WLAN active and no WLAN client
connected
Service button Short press (< 1 s)
Long press (> 3 s)
Identification in the network
Enable / disable WLAN
WLAN is disabled automatically after 10
min if no client is connected
As per description Do the following to reset the device to
factory state:
1. Power off the device.
2. Power on the device.
3. Wait until all LEDs light up and
turn off again, then press the
Service button.
4. Keep the Service button
pressed until all LEDs light up,
then release the button.
All LEDs go off, the device re-
starts.
5. Wait until the device has fully
started – unconfigured (green
RUN LED and red SVC LED
are flashing)

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Product documentation
Related documents such as the environmental declarations, CE declarations, etc., can be
downloaded from the following Internet address:
https://siemens.com/bt/download
Notes
Safety
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.
Mounting position and ambient temperature
The devices can be snapped onto standard rails or screwed onto a flat surface.
Plug-in screw terminals connect power and interfaces.
Ambient temperature -5...50°C (23...122°F) Ambient temperature -5...45°C (23...113°F)
● Wall, horizontal
– From left to right
– From right to left
● Overhead
● Wall, vertically
– From top to bottom
– From bottom to top
● On a horizontal surface
CAUTION
Risk of overheating for failure to comply with ambient temperature
Burning and damage to the device
● Ensure sufficient ventilation to comply with the permissible ambient temperature within
the panel or installation box. The temperature must be at least 10K (18° F) lower out-
side the installation box.

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Installation
WARNING
No internal line protection for supply lines to external consumers
Risk of fire and injury due to short-circuits!
● Adapt the wire cross sections as per local regulations to the rated value of the installed
fuse.
WARNING
The relay outputs may be connected to mains voltage
Risk of electric shock! Incorrect installation of the device may lead to electric shock injuries
when touching the device!
● Install the device in a lockable cabinet or use terminal covers.
● Do not install the device in locations where children are likely to be present.
● Conductors with a cross-section of 0.5 mm2 (AWG24) or greater shall comply with the
requirements of IEC 60332-1-2 and IEC 60332-1-3 or IEC TS 60695-11-21.
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.
Technical data
Power supply
Operating voltage (24 V~, ⏊, ) AC 24V -15 / +20% (PELV)
AC 24V Class 2 (US)
48…63 Hz
Functional ground(US)
Functional earth
The terminal for the functional ground must be
connected on the installation side with the building
grounding system (PE).
Screw terminals for wire cross sections up to Max. 2.5 mm2 (14 AWG)
Internal fusing 4 A irreversible / non-replaceable
External supply line fusing (EU) Non-renewable fuse max. 10A slow-blow
or
circuit breaker max. 13A
Tripping characteristic B, C, D per EN 60898
or
Power supply with current limitation of max. 10A
Power consumption (for transformer planning)
Base load (without loading by I/O modules TXM and
field devices)
10VA / 0.4A
Field device supply V+ (DC 24 V, 100 mA)
(terminals 8 and 19)
5VA / 0.2A

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Field device supply V~ (AC 24 V, 2 A)
(terminals 18 and 29)
48VA / 2A
I/O modules TXM supply 15VA / 0.6A
Function data
Hardware information
Processor Texas Instruments AM335x, 300 MHz
Storage 128 MByte SDRAM (DDR3)
512 MByte NAND Flash
Data backup in the event of power failure
Energy reserve (supercap) to support real-time clock (7 days).
Data available if stored to flash memory. Occurs every 5 minutes.
The interval of 5 minutes is only valid for change log but not for trending.
In case of a power failure, trend log data can be lost up to 30 minutes.
Interfaces
Screw terminals, plug-in
Cu-wire or Cu-strand with wire end sleeve 1 x 0.6mm ∅ to 2.5mm2 (22 to 14AWG)
or 2 x 0.6mm ∅ to 1.0mm2 (22 to 18AWG)
Cu-strand without wire end sleeve 1 x 0.6mm ∅ to 2.5mm2 (22 to 14AWG)
or 2 x 0.6mm ∅ to 1.5mm2 (22 to 16AWG)
Stripping length 6...7.5mm (0.24...0.29 in)
Screwdriver Slot screws, screwdriver size 1 with shaft ø = 3 mm
Max. tightening torque 0.6 Nm (0.44 lb ft)
Ethernet interface
Plug 2 x RJ45, shielded
Interface type 10Base-T / 100Base-TX, IEEE 802.3 compatible
Bit rate 10/100Mbps, autosensing
Protocol BACnet on UDP/IP and HTTPS on TCP/IP
Cabling (in-house cabling only), cable type 10Mbps: Min. CAT3, shielded cable is recommended
100Mbps: Min. CAT5, shielded cable is recommended
Cable length Max. 100m (330ft)
WLAN interface
Interface type Wireless access point
Supported standards
Frequency band
WLAN channels
Maximum radio-frequency power
IEEE 802.11b/g/n
2.4…2.462 GHz
1…11
16.4 dBm
Distance (unobstructed field) Min. 5m (16 ft)
Device pairing Activation / Deactivation with service button
Automatic switch off after 10minutes if no WLAN-client
is connected.
Optionally, for cyber security reasons, the WLAN can be
permanently disabled via configuration.
Default SSID and WLAN password: Scan the QR code.
It will show something like WIFI:S:PXC4.E16_0000550;T:WPA;P:1400052738;;
Then SSID = PXC4.E16_0000550 and password = 1400052738
Determine manually: Use the information from the Date/Series/SN block It will show something like:
Date/Series: 20190423A0000550
S/N: 1400052738
SSID = <ASN>_<Running number after the series letter> and password = <S/N>

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I/O modules TXM interface
Nominal voltage DC 24V
Power supply for I/O modules TXM Max. 300mA
Parallel switchable with 24VDC Supply TXS1.12F4 For details, see: TX-I/O engineering and installation,
CM110562
Protection Short-circuit proof
Connector for I/O modules TXM on the side: No
protection against faulty wiring with AC 24 V
No electrical protection.
Use the cover
On PXC4.E16
Modbus RTU interface
Interface type EIA-485, electrically isolated
Baud rate 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200
(depending on the configuration)
Internal bus termination 120 Ohm, switchable with DIP switch
Internal bus polarization 270 Ohm pull-up/pull-down resistances, switchable with
DIP switch
Cabling (in-house cabling only)
Cable length
3-wire cable
Max. 1000 m (3300 ft)
Protection Short-circuit proof
Protection against faulty wiring with AC 24 V
Inputs
12 universal inputs U1...U12 with the following functions
Temperature measurement, analog
Type Range (over range) Resolution
AI NTC10K -40...115 °C (-52.5...155 °C)
-48...239 °F (-62.5...311 °F)
10 mK (25 °C)
0.018 °F
AI NTC100K -40...125 °C (-52.5...155 °C)
-48...257 °F (-62.5...311 °F)
AI PT1K 385(EU) *) -50...600 °C (-52.5...610 °C)
-58...1112 °F (-62.5...1130 °F)
20 mK
0.036 °F
AI PT1K 375(NA) *) -50...180 °C (-52.5...185 °C)
-58...356 °F (-62.5...365 °F)
10 mK
0.018 °F
AI (LG-)Ni1000*)
AI 2x (LG-)Ni1000*)
Resistance sensor, analog
Type Range (over range) Resolution
AI 1000 Ohm*) 0...1000 Ω (0...1050 Ω) 0.1 Ω
AI 2500 Ohm*) 0...2500 Ω (0...2650 Ω) 0.1 Ω
AI Pt1000*) 0...2500 Ω (0...2650 Ω) 0.1 Ω
AI 1000-1175 Ohm*) for setpoint shift 1000...1175 Ω (900...1295 Ω) 0.1 Ω
*) A fixed value of 1 Ω is calibrated to correct line resistance.
Voltage measurement, analog
Type Range (over range) Resolution
AI 0...10V 0...10V (-1.5...11.5 V) 1mV
AI 0...10 V standard 0...100% (-10...110%) 0.01%
Open connection: Negative voltage -1.5 V (line failure detection)

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Current measurement, analog (only inputs U1, U2, U7, U8)
Type Range (over range) Resolution Load
AI 4-20 mA 4...20 mA (1.6...22.4 mA) 1 µA Min. 490 Ω
AI 0-20 mA 0...20 mA (-3...23 mA) 1 µA Min. 490 Ω
Digital input
Contact query voltage 21.5...25V
Contact query current 1mA; 6 mA initial current
Contact resistance for closed contacts Max. 200Ω
Contact resistance for open contacts Min. 50kΩ
Counter memory (counter inputs 0 ... 4.3 x 109 (32-bit counter)
Min. closing/operating time [ms]
including bounces
Of which
Max. bounce time [ms]
Max. counter frequency
(symmetrical)
BI NO / BI NC 60 20
BI Pulse NO 30 10
CI Mech (25Hz) 20 10 25 Hz
CI El (100Hz) 5 0 100 Hz
Outputs
Analog output
Type Range (over range) Resolution Output current
AO 0-10V 0...10V (-0.05…10.6V) 1mV Max. 1mA
AO 0-10V
standard
0...100%
0% = 0 V, 100% = 10V
(-0.05...10.6 V)
0.01% Max. 1mA
Relay output (outputs DO1...DO4)
External supply line fusing
Non-renewable fuse
Circuit breakers
Max. 10 A, slow
Max. 13 A, characteristic B, C, D as per EN60898
Switching voltage AC/DC Max. AC 250 V / DC 30 V
Min. AC/DC 12 V
Current load AC NO contact: Max. 4 A resistive, 3 A inductive (cos phi
0.6)
NC contact: max. 2 A resistive, 1.5 A inductive (cos phi
0,6)
Min. 1 mA at AC 250 V
Min. 10 mA at AC 12 V
Current load DC NO contact: Max. 3A resistive at DC 30V
NC contact: Max. 1A resistive at DC 30V
Min. 10 mA resistive at DC 12V
Switch-on current NO contact: Max. 10A (1s)
NC contact: Max. 3A (1s)
Response/release time 7ms / 3ms typical
Contact life at AC 250 V (reference values)
At 0.3 A resistive
NO contact at 3A resistive
NC contact at 2A resistive
Reduction fact at ind. load (cos phi = 0.6)
5 x 105 switchings
1 x 105 switchings
1 x 105 switchings
0.6
Insulating strength between relay contacts and system
electronics (reinforced insulation).
AC 3750V, as per EN 60730-1
Field device supply (Onboard)
AC 24V (terminal V~) Max. 2A, short-circuit proof *)

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Field device supply (Onboard)
DC 24V (terminal V+) Max. 100mA, short-circuit proof, protected against
incorrect wiring with AC 24V
Field device supply (I/O modules TXM)
AC 24V (terminal V~ on the I/O modules TXM) Max. 2A, short-circuit proof *)
*) Sum total onboard V~ and TXM bus V~ max. 2A
Conformity
Ambient conditions and protection classification
Classification as per EN60730
Automatic action
Control function
Degree of pollution
Overvoltage category
Type 1
Class A
2
III
Protection against electric shock Suitable for use in protection class I or II systems
Degree of protection of housing to EN 60529
Front parts in DIN cut-out
Terminal part
IP30
IP20
Climatic ambient conditions
● Storage / Transport (packaged for transport) as per
IEC EN 60721-3-1 / IEC EN60721‑3‑2
● Operation as per IEC/EN 60721-3-3
● Class 1K22 / 2K12
Temperature -25...70°C (-13...158°F)
Air humidity 5...95% (non-condensing)
● Class 3K23
Operation in enclosed dry locations, having no
temperature or humidity control
Temperature -5...50°C (23...122°F)
(for details see chapter Mounting)
Air humidity 5...95% (non-condensing)
Mechanical ambient conditions
● Transport per IEC/EN 60721-3-2
● Operation as per IEC/EN 60721-3-3
● Class 2M4
● Class 3M11
Standards, directives and approvals
Product standard IEC/EN 60730-1
Product family standards IEC/EN 63044-x
Electromagnetic compatibility (EMC) For residential, commercial, and
industrial environments
EU conformity (CE) See CE declaration 1)
EAC compliance Eurasian compliance
RCM conformity See RCM declaration 1)
UL/cUL certification (US / Canada) UL916; http://ul.com/database
CSA certification C22.2, http://csagroup.org/services-industries/product-
listing
FCC CFR 47 Part 15C
BACnet. B-BC
Environmental compatibility 1) The product environmental declaration 1) contains data
on environmentally compatible product design and
assessments (RoHS compliance, materials
composition, packaging, environmental benefit,
disposal).
1) Documents can be downloaded at http://siemens.com/bt/download.

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FCC Statement
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 reason-
able protection against harmful interference in a residential installation. This equipment gen-
erates, uses and can radiate radio frequency energy and, if not installed and used in accord-
ance with the instructions, may cause harmful interference to radio communications. How-
ever, 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 de-
termined by turning the equipment off and on, the user is encouraged to try to correct the in-
terference 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.
This device complies with 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
FCC Caution: Changes or modifications not expressly approved by Siemens Switzerland
Ltd. could void the user’s authority to operate the equipment. United States representative
https://new.siemens.com/us/en/products/buildingtechnologies/home.html
Industry Canada statement
This device complies with ISED’s licence-exempt RSSs. Operation is subject to the following
two conditions:
1. This device may not cause interference, and
2. this device must accept any interference received, including interference that may cause
undesired operation.
Radiofrequency radiation exposure statement
This equipment complies with FCC and IC radiation exposure limits set forth for an uncon-
trolled environment. This equipment should be installed and operated with minimum distance
of 20cm between the radiator and your body.
This transmitter must not be co-located or operating in conjunction with any other antenna or
transmitter.
Housing
Color top/bottom RAL 7035 (light grey) / RAL 7016 (anthracite grey)
Dimensions per DIN 43880, see dimensions
Weight without/with packaging 483g / 553g

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Connection terminals
68 69 70
3 4 5 6 7
8 9
Terminal Symbol Description Module Channel
1, 2 2 x RJ45 interface for Ethernet with switch
3, 4 KNX PXC4.E16: KNX PL-Link (for future use)
5, 6 24 V ~,
⏊
Operating voltage AC24V
7 Functional ground (must be connected on the installation side with
the building grounding system (PE).
8 to 29 Ux Universal inputs/outputs 61 1…12
⏊Measuring ground for Ux
8, 19 V+ DC 24V power for field devices 2.4W / <100mA
18, 29 V~ AC 24V power for field devices 48VA / 2A
68, 69, 70 COM PXC4.E16: Interface EIA-485 (Modbus RTU)
Term on, off PXC4.E16: Switch for bus termination
Polar on, off Switch for polarization
75 to 86 DOx Relay outputs 11 1…4
Wiring lines for field devices
Wiring length max. 300 m (1,000ft), CU wire or CU strand.
Cross-section depending on the signal
30m (100ft) applies for signal types AI NTC10K and AI NTC100K
or 80m (260ft) with shielding
Examples of connection diagrams for universal inputs/outputs
Digital inputs
Ux
Ux
S1
S2
Feedback contact (NO)
Feedback contact (NC)
Count inputs: Counter inputs, that count faster than 1 Hz and are laid with more than 10 meters using analog inputs in
the same cable duct, must be shielded.

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Analog inputs
Ux
Ux
Ux
Ux
Ux
M
B
V
VV
Ux
+
V+
+
+ +
B1
B2
B3
B4
B5
B6
Temperature sensor LG-Ni 1000
Temperature sensor, general
Resistance transmitter
Active sensor powered by the automation station
Active sensor with external power
Do NOT ground external power (ground loops)
Active sensors 0 ... 20 mA or 4 ... 20 mA (2-wire)
On U1, U2, U7, U8 only
Analog outputs
Ux
Ux
V
Ux
+
V+V+
Y1
Y2
Y3
Device with input DC 0...10 V
General device with control input DC 0...10 V,
Powered by the automation station
General device with control input DC 0...10 V,
Do NOT ground external power (ground loops)
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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Dimensions
All dimensions in mm and inches.
PXC4.E16
183 (7.20")
198 (7.80")
117 (41.61")
124 (4.88")
3 (0.12")
4.1 (0.16")
70.5 (2.78")
49 (1.91")
26.5 (1.04")
45 (1.77") 67 (2.64")
110 (4.33")
7 (0.28")
PXC4.E16 with TXM module
198 (7.80") 64 (2.52")
90 (3.54")
7 (0.28")
269 (10.59")

Issued by
Siemens Switzerland Ltd
Smart Infrastructure
Global Headquarters
Theilerstrasse 1a
CH-6300 Zug
[phone]
www.siemens.com/buildingtechnologies
© Siemens Switzerland Ltd, 2020
Technical specifications and availability subject to change without notice.
Document ID A6V11646018_en--_e
Edition 2021-06-11