SIEMENS PXC7 Automation Stations Instruction Manual

System controller for system networks with PXC3, PXC4, PXC5, PXC7 and DXR controllers over BACnet/IP, BACnet/SC, or BACnet MS/TP
Integrates data points and/or subsystems via Modbus RTU and/or Modbus TCP

Integrates MS/TP devices
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) or BACnet MS/TP, in compliance with the BACnet standard including B-BC profile (Rev. 1.15)
BACnet Secure Connect communication as BACnet/SC hub and 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 or DC 24 V
DIN rail or screw mounting

Plug-in screw terminal blocks

Type summary

Standardized hardware
PXC7.E400S, M, and L are based on the same hardware and all have the same look and feel. Interfaces like RS485 are enabled and disabled according to the type specification.

PXC7 variants	E400S	E400M	E400L
Order number	S55375-C111 ¹⁾	S55375-C110 ¹⁾	S55375-C105 ¹⁾
Number of TXM inputs and outputs	up to 100	up to 200	up to 400
Number of integration data points (Modbus TCP and/or RTU)	up to 100	up to 200	up to 400
Total number TXM-I/Os and integration DPs	100 ²⁾	250 ²⁾	600 ²⁾
Number of BACnet/SC devices connected as nodes	up to 100	up to 100	up to 100
Number of BACnet MS/TP devices in a field level network	up to 60 ³⁾	up to 120 ³⁾ (2 x 60)	up to 240 ³⁾ (4 x 60)
Number of KNX PL-Link devices	up to 64	up to 64	up to 64
Number of configurable RS485 interfaces either for integration of Modbus RTU or BACnet MS/TP	1	2	4

For details on engineering, see PXC4, PXC5 & PXC7 Planning overview, A6V13054435.
KNX PL-Link DPs do not count as integration points. For KNX PL-Link, only the limitation of BACnet objects have to be considered.
Depending on the behavior of the third-party MS/TP devices.

TXM input/output modules

Description	Type	Data sheet
Digital input module 8 or 16 I/O points	TXM1.8D, TXM1.16D	CM2N8172
Universal module with/without local operation and LCD	TXM1.8U, TXM1.8U-ML	CM2N8173
Super universal module with/without local operation and LCD	TXM1.8X, TXM1.8X-ML	CM2N8174
Relay module with/without local operation	TXM1.6R, TXM1.6R-M	CM2N8175
Resistance measuring module (for Pt100 4- core cable)	TXM1.8P	CM2N8176
Triac module (only if PXC7.E400 is powered with AC)	TXM1.8T	CM2N8179
Digital input and relay module	TXM1.4D3R	CM2N8188

Power module	TXS1.12F10	CM2N8183
Bus connection module	TXS1.EF10	CM2N8183
Island bus extension module	TXA1.IBE	CM2N8184

For details, see planning overview A6V13054435 and data sheets.
KNX PL-Link devices

Description	Type	Data sheet
Wall-mounted temperature sensor	QMX3.P30	CM2N1602
Wall-mounted temperature and humidity sensor	QMX3.P40
Wall-mounted temperature, humidity, and CO₂ sensor	QMX3.P70
Wall-mounted temperature sensor and room operator unit	QMX3.P34
Wall-mounted temperature and humidity sensor and room operator unit	QMX3.P44
Wall-mounted temperature, humidity, and CO₂ sensor and room operator unit	QMX3.P74

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

Description	Type	Data sheet
BACnet touch panels with integrated web server		A6V11664137
7.0 “	PXM30.E
10.1 “	PXM40.E
15.6 “	PXM50.E
Touch panels with data storage in web server PXG3.Wx00-2		A6V11664139
7.0 “	PXM30-1
10.1 “	PXM40-1
15.6 “	PXM50-1
BACnet/IP web server with standard functionality	PXG3.W100-2	A6V12304192
BACnet/IP web server with extended functionality	PXG3.W200-2

Product documentation

Related documents such as environmental declarations, CE declarations, etc., can also be downloaded at the following Internet address: www.siemens.com/bt/download

Technical and mechanical design

		4	Service button (ID on network and WLAN on/off)
		5	2-port Ethernet switch (with 2 LEDs per port for display purposes)
		6	Ethernet port (for future use)
		7	Plug-in terminal block with screw terminals KNX PL-Link
		8	Plug-in terminal blocks with screw terminals Power supply
		9	Plug-in terminal block with screw terminals Digital input (for future use)
		10	Data matrix code
		11	Connection for TXM modules (island bus)
		12	Plug-in terminal block with screw terminals M-bus (for future use)
		13 14 15 16	Plug-in terminal block with screw terminals (either Modbus or MS/TP) COM1 interface COM2 interface COM3 interface COM4 interface Activation of COM 1/2/3/4 depending on Type (S,M,L)
		17	DIP switches for bus termination and polarization
		18	QR code for default WLAN access Description in technical data
		19	Date/series and serial number
1	Plastic housing	20	Slider for mounting on DIN rails
2	Battery cover	21	Eyelets for cable ties
3	LEDs for communication and state	22	Holes for wall mounting

LED displays

Activity	LED	Color	Activity	Function
	Ethernet	Green	Steady ON Steady OFF Flashing	Link active No connection Network traffic
	Ethernet	Yellow	Steady ON Steady OFF	Link 100 Mbps Link 10 Mbps
	RUN	Green	Steady ON Steady OFF Flashing	Device operational Device not operational Start-up or program stop
	RUN	Red	Steady OFF Steady ON Rapid flashing	OK HW or SW fault Firmware or application missing/corrupted
		Blue	Steady ON Steady OFF	Cloud connection OK No cloud connection
	BAT	Red	Steady OFF Steady ON	Optional battery OK Optional battery empty – replace
	TXM	Yellow	Flashing Steady OFF	Communication No communication with TXM modules
	SVC	Red	Steady OFF Flashing	OK Device not configured
			Flashing after wink command	Device ID after receipt of wink command

	WLAN	Blue	Steady OFF	WLAN inactive
			Steady ON	WLAN active and at least one WLAN client connected
			Flashing	WLAN active and no WLAN client connected
	COM…	Yellow	Flashing Steady OFF	Communication (TX: Transmit, RX: Receive) No communication to subsystem
	KNX	Yellow	Flashing Steady OFF	Communication (TX: Transmit, RX: Receive) No communication to subsystem
	M-bus	Yellow		Reserved for future use
	Service button		Press 0.2 … 1 s Press 1 … 3 s	ID in the network WLAN enable/disable WLAN disables automatically after 10 minutes if no client is connected
	Service button		Factory reset	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)

Notes

Safety & 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.

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 outside the installation box.

Installation

WARNING
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.

Technical data

Power supply

Operating voltage AC 24 V (24 V=, J_, kt)	AC 24 V -15 / +20 % (PELV) AC 24 V Class 2 (US) 48…63 Hz
Operating voltage DC 24 V (24 V=, 1, 4)	DC 24 V -15 / +20 % (PELV) DC 24 V Class 2 (US)
Functional ground (US) Functional earth Fist	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 / power supply planning)

	Operating voltage AC 24 V	Operating voltage DC 24 V
Full load	71 VA / 3.0 A	66 W / 2.8 A
Base load (without loading by I/O modules TXM, KNX PL-Link, M-Bus, and field devices)	15.4 VA / 0.64 A	7.8 W / 0.33 A
I/O modules TXM supply	15 VA / 0.6 A	8 W / 0.3 A
KNX PL-Link supply	4 VA / 0.17 A	2.2 W / 0.09 A
M-Bus supply, for future use	3 VA / 0.13 A	1.7 W / 0.07 A
Field device supply V~	Max. 2 A, total of the connected field devices < 48 VA / 48 W

Function data

Hardware information
Processor	NXP i.MX8 QuadXPlus, 1.2 GHz
Storage	2 GB RAM 8 GB eMMC

Interfaces

Ethernet interface
Plug	3 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)

The COM interfaces can be used either for Modbus or for MS/TP, according to type and configuration.

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 and DC 24 V

BACnet MS/TP interface
Interface type	EIA-485, electrically isolated
Baud rate	9600, 19200, 38400, 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) Distance between 2 devices Length of the MS/TP line	3-wire cable, shielded Max. 500 m (1650 ft) Max. 1000 m (3300 ft)
Protection	Short-circuit proof Protection against faulty wiring with AC 24 V and DC 24 V

WLAN interface
Interface type	Wireless access point
Supported standards Frequency band WLAN channels Maximum radio-frequency power	IEEE 802.11b/g/n 2.412…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:PXC7.E400_0000550;T:WPA;P:1400052738;; Then SSID = PXC7.E400_0000550 and password = 1400052738 Determine manually: Use the information from the Date/Series/SN block It will show something like: Date/Series: 202104230000550 S/N: 1400052738 SSID = <ASN>_<Running number after the series letter> 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
TXM I/O module power	Max. 300 mA
Switchable in parallel with DC 24 V power supply module TXS1.12F4	For details, see: TX-I/O- engineering and installation, CM110562
Protection	Short-circuit proof
TXM I/O module plug: No protection against faulty wiring on AC 24 V	No electric protection. Use cover

Field device power (I/O module TXM)
AC 24 V (terminal V~ on the TXM module)	Max. 2 A, short-circuit proof (Only if PXC7 is powered with AC).

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)

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 I
Protection against electric shock	Protection class III
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 60721‑3‑2 ● 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

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

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

Color top/bottom	2003 Ti-Grey / 804 Black
Dimensions	per DIN 43880, see dimensions
Weight without/with packaging	516 g / 581 g

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.
Dispose of empty batteries at designated collection points.

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.

Connection terminals

Terminal	Symbol	Description
1A, 1B		2 x RJ45 interface for Ethernet with switch
2		1 x RJ45 interface (for future use)
3, 4	KNX	KNX PL-Link
5, 6	~ , ⏊	Operating voltage AC 24 V
7		Functional ground (must be connected on the installation side with the building grounding system (PE).
10, 11	D, ⏊	Digital input (for future use)
Term	On, off	Switch for bus termination
Polar	On, off	Switch for polarization
66, 67	MBUS	M-bus interface (for future use)
68, 69, 70	COM1	Interface EIA-485 (Modbus and MS/TP) Remark: Activation of COM 1/2/3/4 depending on Type (S,M,L)
71, 72, 73	COM2
74, 75, 79	COM3
77, 78, 79	COM4
Right side of device		Interface for connecting TXM input/output modules

Dimensions

All dimensions in mm and inches.
PXC7

PXC7 with four TXM modules

Issued by
Siemens Switzerland Ltd
Smart Infrastructure
Global Headquarters
Theilerstrasse 1a
CH-6300 Zug
+41 58 724 2424
www.siemens.com/buildingtechnologies
© Siemens Switzerland Ltd, 2022
Technical specifications and availability subject to change without notice.
Document ID A6V12505052_en–_c
Edition 2022-08-30

Documents / Resources

SIEMENS PXC7 Automation Stations [pdf] Instruction Manual
PXC7.E400S, PXC7.E400M, PXC7.E400L, PXC7, PXC7 Automation Stations, Automation Stations, Stations

References

User Manual