SIEMENS PXC4.E16 Automation Stations Instruction Manual

Desigo™
Automation stations
PXC4.E16

PXC4.E16 Automation Stations

For the control of primary plants

1. Compact automation station for HVAC and building control systems, freely programmable using graphical programming interface
2. Communication BACnet/IP (BTL certified)
3. 2-port Ethernet switch for low-cost cabling
4. 16 inputs/outputs: 12 universal inputs/outputs, 4 relay outputs Extendable via I/O modules TXM…
5.  KNX PL-Link bus to connect sensors and operator units (including bus power)
6. Integration of Modbus data points via RTU and / or TCP
7. WLAN interface for engineering and commissioning
8. Operating voltage AC 24 V
9. Mounted on standard rails or on the wall
10. Plug-in screw terminal blocks

Functions

Optimized, flexible automation station for HVAC and building automation and control systems

• System functions (alarming, scheduling, trending, access protection with individually definable user profiles and categories)

• Integrates data points and/or subsystems via Modbus RTU and/or Modbus TCP

• The following functions are available with KNX PL-Link bus:
  – Communication with room operator units and sensors.
  – Plug-and-play connection of Siemens field devices with KNX PL-Link.

• Engineering and commissioning with the ABT Site Tool using graphical function charts

• Freely programmable. All function blocks, available in libraries, can be graphically connected.

• BTL tested BACnet communication on IP (BACnet/IP or BACnet/SC), in compliance with the BACnet standard including B-BC profile (Rev. 1.15)

• BACnet Secure Connect communication as BACnet/SC node

• Generic operation via embedded web interface

• Cloud connectivity for remote access

• 2-port Ethernet switch for low-cost cabling

• WLAN interface for engineering and commissioning

• Operating voltage AC 24 V

• DIN rail or screw mounting

• Plug-in screw terminal blocks

• Direct connection of field devices

Type summary

(node only)

1. For details on engineering, see PXC4, PXC5 & PXC7 Planning overview, A6V13054435.
2. KNX PL-Link DPs do not count as integration points. For KNX PL-Link, only the limitation of BACnet objects have to be considered.

Onboard inputs/outputs

UIO| Universal inputs/outputs support the following signal types:
●  Passive sensors LG-Ni 1000, 2x LG-Ni1000, Pt 1000 (375, 385), NTC 10k (Type II / Beta (0-50 °C) = 3892 K),
NTC 100k
●  Resistance sensors 1000 Ohm, 2500 Ohm, 1000…1175 Ohm (for setpoint shift)
●  Voltage input analog 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)

Equipment combinations
I/O modules TXM (Series D and later)

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 A6V13054435).
KNX PL-Link devices

QMX3.P74

For details, see planning overview A6V13054435 and data sheets.
Desigo Control Point

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.W100-2
PXG3.W200-2| A6V12304192

System controller

A6V12505052

Technical and mechanical design

The compact build allows for mounting the devices on a standard rail or a wall.

| 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
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

LED displays

| 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
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|  | Press 0.2 … 1 s
Press 1 … 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 restarts.
5.  Wait until the device has fully started – unconfigured (green RUN LED and red SVC LED are flashing)

Product documentation

Related documents such as the environmental declarations, CE declarations, etc., can be downloaded from the following Internet address: www.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

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 European Directive and may not be disposed of as domestic waste.

• Use only designated channels for disposing the devices.
• 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
PXC4.E16S: without loading by I/O modules TXM and field devices
PXC4.E16: without loading by I/O modules TXM, KNX PL-Link, and field devices| 10 VA / 0.4 A| 10 VA / 0.4 A
Field device supply V+ (DC 24 V, 100 mA) (terminals 8 and 19)| 5 VA / 0.2 A| 5 VA / 0.2 A
Field device supply V~ (AC 24 V, 2 A) (terminals 18 and 29)| 48 VA / 2 A| 48 VA / 2 A
I/O modules TXM supply| 15 VA / 0.6 A| 15 VA / 0.6 A
KNX PL-Link supply|  | 4 VA / 0.17 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/IP on UDP/IP, BACnet/SC on TCP/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.E160000550 and password = 1400052738
Determine manually: Use the information from the Date/Series/SN block It will show something like: Date/Series: 20190423A 0000550
S/N: 1400052738
SSID = and password = <S/N>
KNX PL-Link interface

Type| KNX TP1 PL-Link, galvanic isolation Baud rate: 9.6 kbps
Cabling (in-house cabling only)
Cable length| 2-wire cable, 0.75 mm2 / AWG20 or 1 mm2 / AWG18
With internal supply: Max. 80 m (262 ft) With external supply: Max. 1000 m (3300 ft)
Internal bus power| Max. 50 mA
When using external bus power for KNX PL-Link, switch off the internal bus power via the ABT Site Tool.
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| 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 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, shielded cable recommended (shield must be connected to building earth in the mounting panel)
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 (Type II / Beta (0-50 °C) = 3892 K)| -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)
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 switching’s
1 x 105 switching’s
1 x 105 switching’s
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 *)
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.

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 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 equipment 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.

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 user 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 license-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 uncontrolled environment. This equipment should be installed and operated with a minimum distance of 20 cm between the radiator and your body.
This transmitter must not be co-located or operated in conjunction with any other antenna or transmitter.
Housing

Connection terminals

| 2 x RJ45 interface for Ethernet with switch|  |
3, 4| KNX| PXC4.E16: KNX PL-Link|  |
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).|  |
9 to 17

20 to 28

| 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

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.
Analog inputs

Analog outputs

Warranty

The application-specific technical data is guaranteed only in combination with the Siemens products listed in the ‘Device combinations’ section. If third- party products are used, any guarantee provided by Siemens will be invalidated.

Dimensions

All dimensions in mm and inches.

© Siemens Switzerland Ltd, 2020
Technical specifications and availability subject to change without notice.
Issued by
Siemens Switzerland Ltd
Smart Infrastructure
Global Headquarters
Theilerstrasse 1a
CH-6300 Zug
+41 58 724 2424
www.siemens.com/buildingtechnologies
Document ID
A6V11646018_en–_j
Edition
2022-10-06

References

• CSA Group Product Listing - CSA Group
• Smart Information Delivery
• Product Sourcing and Certifications Database | UL Solutions
• Smart Information Delivery
• Building technology - Products & Services - Siemens Global Website
• Building Technologies - Building Technologies - Siemens USA

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