Siemens Desigo™ PX BACnet Router
Models: PXG3.L, PXG3.M
A versatile BACnet router designed for seamless integration between BACnet/IP, BACnet/LonTalk, and BACnet MS/TP networks.
Key Features
- Routing between BACnet/IP, BACnet/LonTalk (PXG3.L only), and BACnet MS/TP.
- Supports BACnet/IPv4 and BACnet/IPv6.
- BACnet standard compliant.
- ISO 16484-5 compliant.
- BTL label (BACnet communications passed the BTL test).
- BBMD support (BACnet Broadcast Management Device).
- Third-party device support.
- Configuration via Xworks Plus or Web browser (via IPv4).
- Web browser access to network statistics.
- Firmware update via Ethernet and USB Device.
- LED indication for Ethernet link and activity.
- LED indication for BACnet/LonTalk and BACnet MS/TP (diagnostics).
- 2-port Ethernet switch for low-cost cabling (10/100 baseT).
- BACnet MS/TP (RS-485) baud rates: 9600, 19200, 38400, 76800, 115200.
- Plug-in screw terminal blocks for supply, LONWORKS, and MS/TP.
- RJ45 plug for PXM20 (LONWORKS).
- Operating voltage: AC 24 V or DC 24 V.
- DIN rail mounting.
- BACnet MS/TP Slave Proxy.
- SNMP (v2), MIB-2.
- BACnet NAT.
Product Overview and Use
The PXG3... BACnet router connects a BACnet/IP network to a BACnet/LonTalk network (PXG3.L only), and/or a BACnet MS/TP channel. BACnet objects are transmitted simultaneously throughout any and all networks.
Diagram Description: A network diagram illustrates the router's connectivity, showing how it links BACnet/IPv4, BACnet/IPv6, BACnet/LonTalk (PXG3.L only), and BACnet MS/TP networks, with connections to Desigo Insight and third-party devices.
Router Functions
Four-way routing
The PXG3... BACnet router transmits BACnet protocol between a BACnet/IPv4 network, a BACnet/IPv6 network, a BACnet/LonTalk network (PXG3.L only), and a BACnet MS/TP channel. BACnet objects are simultaneously transmitted throughout any and all networks.
BBMD (Broadcast Management Device)
Used to distribute BACnet Broadcast messages across IP Routers.
Web server
The BACnet router includes a Device Object and can be operated by a BACnet Client. The present operating state, date and time, as well as statistics on sent packages can be viewed via the web server.
MS/TP Slave Proxy
The BACnet router can serve as a Slave Proxy for slaves connected to its MSTP port. It responds to Who-Is messages on the slaves' behalf by sending an I-Am message.
SNMP v2
Simple Network Management Protocol MIB-2, used for monitoring and diagnosing the BACnet router network interface.
BACnet NAT
Supports the setup of a BACnet network over a NAT device. Additionally, remote access from a public network to BACnet devices is possible on a private network. Important: The public IP address must be static. For security reasons, VPN tunneling is recommended with BACnet NAT.
BACnet/IP to BACnet/IP
When routing between BACnet/IP on the same IP network, the BACnet router address must be the same on both BACnet networks. The difference lies in the use of different BACnet UDP ports on the BACnet network.
Communication and Connectivity
- The router complies with BACnet standard and ISO 16484-5.
- A 2-port Ethernet switch allows low-cost cabling via line topology, serving as the preferred commissioning medium.
- The LONWORKS network is connected via a 2-pin connection terminal.
- The MS/TP channel is connected via RS485 or a 3-pin connection terminal.
- An RJ45 plug on the device front allows connecting to a PXM20 operator unit (PXG3.L only).
- A USB port is available for connecting configuration tools.
Type Summary
| Type (ASN) | Product number (SSN) | Name | Ethernet ports | LONWORKS | MS/TP |
|---|---|---|---|---|---|
| PXG3.L | S55842-Z105-A100 | BACnet Router Ethernet/IP-LonTalk-MS/TP | 2 | ✔ | ✔ |
| PXG3.M | S55842-Z106-A101 | BACnet Router Ethernet/IP-MS/TP | 2 | ✔ |
Mechanical Design
Diagram Description: A schematic illustrates the physical layout of the router with numbered components:
- Plastic housing
- Plug-in terminal block (operating voltage)
- 2-port Ethernet switch (with 2 LEDs each for display purposes)
- LEDs for device and system status indication
- RJ45 interface for PXM20 (PXG3.L only)
- Tool interface (USB Device)
- Service button for identification on network (Ethernet, LONWORKS)
- LONWORKS terminal block (PXG3.L only)
- MS/TP terminal block
- Slider for mounting on DIN rail
LED Indicators
Diagram Description: Visual representation of the HMI/Tool LEDs (RUN, FLT, INF, COM1, COM2, SVC) and Ethernet port LEDs.
| LED | Color | Activity | Function |
|---|---|---|---|
| RUN | Green | Continuously ON | Device ready. |
| Continuously OFF | At least one internal power supply out of range. | ||
| Flashing | Start-up of device. | ||
| FLT | Red | Continuously OFF | OK |
| Continuously ON | HW fault or program fault. | ||
| Flashing | Incorrect or corrupt FW. | ||
| INF | Yellow | Flashing | (Not used) |
| COM1 | Yellow | Flashing | Sends MS/TP packages. |
| COM2 | Yellow | Flashing | Sends LONWORKS packages (PXG3.L only). |
| SVC | Red | Continuously OFF | Unconfigured. |
| Continuously ON | Configured. | ||
| Flashing | Defective Hardware. | ||
| Flashing per wink command *) | Physical identification of the router. | ||
| Ethernet 1/2 | Green | Continuously ON | Link active |
| Continuously OFF | Link inactive | ||
| Flashing | Network activity | ||
| Yellow | Continuously ON | Link 100 Mbps | |
| Continuously OFF | Link 10 Mbps |
*) Wink command pattern: A visual representation shows a flashing pattern with durations (2s, 1s) and frequencies (5 Hz).
Service Button
Diagram Description: Location of the service button (labeled '1') on the device.
Factory Reset Procedure:
- Power off the device.
- Power on the device.
- Wait for all LEDs to light up and turn off, then push the SVC button.
- Keep the SVC button pressed until all LEDs light up, then release. (For Desigo V6_SP and earlier: Keep pressed until the green RUN LED flashes, then release).
- Wait for the device to fully start up unconfigured (RUN LED on, SVC LED flashes).
Note: Any device passwords and other settings are lost.
Engineering, Installation, and Maintenance
Engineering
The router does not require programming. Configuration is performed using Xworks Plus or the Desigo SSA-DNT via Ethernet, or using a USB device. For details, refer to SSA (Setup & Service Assistant) Commissioning, CA111050. Each device has a unique identification number on a removable barcode label and a unique MAC address. For more details, see document "Ethernet, TCP/IP, MS/TP and BACnet - Principles" (CM110666).
Installation
Ethernet: Refer to installation manual Desigo TRA, CM111043.
LONWORKS: Refer to installation manual Desigo RXC, CA110336.
Note: The HMI (RJ45 plug) only supports the PXM20. Connecting other devices may damage the PXG3.L or the connected device.
Mounting
The router is designed for mounting on a standard mounting rail or a wall. Power is supplied by connecting the plug-in screw terminal blocks.
Commissioning
To prevent equipment damage and/or personal injuries, adhere to local safety regulations and related safety standards.
Maintenance
No maintenance is required. A supercap supports the real-time clock for up to 3 days.
Disposal
These devices are considered electronic waste according to the European Directive 2012/19/EU (WEEE) and must not be disposed of as domestic waste. Dispose of the devices via the proper channels and observe all local and applicable laws.
Technical Data
Operating Voltage and Power
| Parameter | Specification |
|---|---|
| Operating voltage (24 V~, ⚡, ?) | AC 24 V ± 20 % (SELV/PELV) or AC/DC 24 V class 2 (US), 48...63 Hz. Symmetric. |
| Power consumption | Max. 9 VA (At AC 24 V) |
| Max. 4 W (At DC 24 V) | |
| Max. permissible transit power AC/DC 24 V (RJ45 interface, HMI) | Max. 0.5 A |
| Internal fuse | With PTC |
Hardware Information
| Parameter | Specification |
|---|---|
| Processor | Series B: Atmel ARM9 Series C: Texas Instruments AM3352, 600MHz |
| Memory | Series B: 256 MB Flash, 64 MB SDRAM Series C: 512 MB Flash, 512 MB SDRAM (DDR3) |
| Response to power / communication failure | Energy reserve (Supercap) to support real-time clock (3 days). Data available only if saved to flash memory. |
Interface Specifications
| Interface | Type | Details |
|---|---|---|
| Ethernet interface | 2 x RJ45, screened | 100BaseTX, IEEE 802.3 compatible, 10/100 Mbps, half / full duplex, auto-negotiation. Protocol: BACnet over UDP/IP. |
| HMI interface | RJ45 | (PXG3.L only) |
| USB interface | Type B (USB device) | Data rate: 12 Mbps. Galvanic isolation: No. Protective switch against surges and overcurrent: Yes. |
| LONWORKS interface (PXG3.L only) | TP/FT-10 | Transceiver: FT 5000 smart transceiver. Galvanic isolation: Yes. Bit rate: 78 kbps. Protocol: BACnet over LonTalk. |
| MS/TP interface | RS485 | Galvanic isolation: Yes. Baud rates: 9600, 19200, 38400, 76800, 115200. Protocol: BACnet over MS/TP. |
Connection Terminals, Plug-in
| Parameter | Specification |
|---|---|
| Design type | Plug-in screw terminals |
| Wire size | Cu-wire or Cu-strand with wire end sleeve: 1 x 0.6 mm dia. to 2.5 mm² or 2 x 0.6 mm dia. to 1.0 mm² Cu-strand without wire end sleeve: 1 x 0.6 mm dia. to 2.5 mm² or 2 x 0.6 mm dia. to 1.5 mm² |
| Screwdriver | Slot screws, size 1 with shaft dia. ≤ 4.5 mm |
| Max. tightening torque | 0.6 Nm |
Standards, Approvals, and Environmental Data
| Parameter | Specification |
|---|---|
| Assignment as per EN 60730 | Operation of automatic controller: Type 1 Degree of pollution: 2 Design type: Protection class III |
| Housing protection standard | Protection type as per EN 60529: IP30 Front parts in the DIN section: IP30 Terminal part: IP20 |
| Ambient conditions (Operation) | Climatic: Class 3K5, -5 ... 50 °C, 5...95% r.h. (non-condensing) Mechanical: Class 3M2 |
| Ambient conditions (Transport) | Climatic: Class 2K3, -25...70 °C, 5...95% r.h. (non-condensing) Mechanical: Class 2M2 |
| Standards, directives, and approvals | Product standard: EN 60730-1 (Automatic electrical controls for household and similar use) Product family standard: EN 50491-x (General requirements for Home and Building Electronic Systems (HBES) and Building Automation and Control Systems (BACS)) |
| Electromagnetic compatibility (Applications) | For use in residential, commerce, light-industrial and industrial environments. EU conformity (CE): CM1T9270xx ¹) UL certification (US): UL 916, http://ul.com/database RCM-conformity (EMC): CM1T9222en_C1 ¹) EAC conformity: Eurasia conformity BTL Certificate: www.bacnetinternational.net/btl/search.php ²). |
| Environmental compatibility | Product environmental declaration (contains data on RoHS compliance, materials composition, packaging, environmental benefit, disposal): CM1E9270 ¹). |
| Color | Housing: RAL 7035 (light-gray) |
| Dimensions | Housing as per DIN 43880, see dimensions. |
| Weight | Without/with packaging: 286 g / 332 g |
Footnotes:
1) The documents can be downloaded at http://siemens.com/bt/download.
2) Filter list of results for 'BTL-31001'.
Connection Terminals and Interfaces
Diagram Description: A view of the router's front panel showing numbered connection points and interface labels.
| Connection Point | Interface | Details |
|---|---|---|
| 1, 2 | Ethernet | 2 x RJ45 interface |
| 3 | Operating Voltage | AC/DC 24 V |
| 5 | LONWORKS | (PXG3.L only) |
| ↓ | MS/TP | MS/TP interface |
| HMI | RJ45 | RJ45 interface for HMI (PXG3.L only) |
| USB | USB Tool Interface | USB tool interface |
| Service | Service Button | Service button |
RJ45 Pin Assignment for HMI
| Pin | Name | Description | Pin | Name | Description |
|---|---|---|---|---|---|
| 1 | CLA | LONWORKS A | 5 | nc | Not connected |
| 2 | CLB | LONWORKS B | 6 | nc | Not connected |
| 3 | AC24V_N | AC24V Neutral | 7 | nc | Not connected |
| 4 | AC24V_L | AC24V Line max. 500mA | 8 | nc | Not connected |
Operating Voltage Pin Assignment
| Pin | Name | Description |
|---|---|---|
| 1 | 24 V ~ | AC 24 V |
| 2 | System neutral | |
| 3 | Technical ground |
LONWORKS Pin Assignment
| Pin | Name | Description |
|---|---|---|
| 4 | CLA | LONWORKS A |
| 5 | CLB | LONWORKS B |
MS/TP Pin Assignment
| Pin | Name | Description |
|---|---|---|
| + | Data + | |
| - | Data – | |
| Reference wire |
Dimensions
All dimensions in mm.
Diagram Description: Orthographic views (front, side, top) of the router with dimensions indicated in millimeters. Key dimensions include overall width (162 mm), height (approx. 110 mm), and depth (approx. 90 mm), with detailed measurements provided for various features.
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