Item no. 750-829

Controller BACnet MS/TP

Item no. 750-829
Controller BACnet MS/TP;
Stock item

The BACnet MS/TP Controller (750-829) connects the WAGO I/O System to the BACnet protocol and supports the B‐BC BACnet device profile per DIN EN ISO 16484‐5. It communicates with other BACnet devices via BACnet MS/TP.

The controller provides the three following functionalities:

  • 1. Native server: For each channel, appropriate BACnet objects are generated automatically for the digital and analog I/O modules that are connected to the controller.
  • 2. Application server: Other supported BACnet objects can be created via IEC 61131‐3 programming environment and made available to a BACnet network.
  • 3. Application client: Using the client functionality, objects and their properties can be accessed by other BACnet devices.

The IEC 61131-3 programmable controller is multitasking-capable and features a capacitor-backed RTC.

The ETHERNET service interfaces can be used for IEC downloads, for example. Furthermore, two ETHERNET interfaces and an integrated switch allow the ETHERNET fieldbus to be wired in a line topology. This eliminates additional network devices, such as switches or hubs. Both interfaces support autonegotiation and Auto-MDI(X).

An integrated Webserver provides configuration options to the user, while displaying the controller's status information. The Webserver cannot be used via BACnet MS/TP.

For initial start-up, access to the Web-Based Management (WBM) via standard Web browser is required to set the baud rate and activate the MS/TP fieldbus. Further configuration and commissioning is performed via WAGO BACnet Configurator's Windows software (V1.8 or higher) and requires an additional BACnet router within the network.

The Protocol Implementation Statement (PICS) contains all supported objects, services and properties. The controller supports a maximum of 250 BACnet objects.

A slide switch enables the switching on of a terminating resistor together with the BIAS network on the RS-485 interface.


The WAGO BACnet Configurator can be downloaded for free at

Product details

Technical data
Communication BACnet MS/TP
Modbus (TCP, UDP)
Visualization Web Visu
CPU 32 bits
Programming languages per IEC 61131-3 Instruction List (IL)
Ladder Diagram (LD)
Function Block Diagram (FBD), Continuous Function Chart (CFC)
Structured Text (ST)
Sequential Function Chart (SFC)
Programming environment WAGO-I/O-PRO V2.3 (based on CODESYS V2.3)
Configuration options WAGO-I/O-CHECK
BACnet Configurator
Web-Based Management
Network length (max.) limited by IEEE 802.3 specification
Baud rate BACnet MS/TP: 38.4 kBd (9600, 19200, 38400*, 57600, 76800, 115200 Bd (per BACnet standard); * Factory setting)
Bus segment length (max.) BACnet MS/TP: 1200 m; Depends on baud rate/cable (per BACnet standard) 1200 m at ≤ 76800 baud; 1000 m at > 76800 baud; ETHERNET: 100 m
Transmission medium (communication/fieldbus) ETHERNET: Twisted Pair S-UTP, STP; 100 Ω; Cat. 5e
Program memory 1024 kByte
Data memory 1024 kByte
Non-volatile software memory 32 Kbytes
Memory for fieldbus input variables (max.) 512 Byte
Memory for fieldbus output variables (max.) 512 Byte
Number of modules per node (max.) 99
Number of modules without a bus extension (max.) 64
Input and output (fieldbus) process image (max.) 1020 Worte/1020 Worte
Device-specific BACnet device profile: B-BC (BACnet building controller); BACnet revision: 1.7
Powerfail RTC buffer 6 days (min.)
Indicators LED (LINK/ACT) green: Network connection via ports 1 … 2; LED (MS/BT, NS) red/green: Status of node/BACnet, network; LED (I/O, USR) red/green/orange: Local data bus status, status programmable by user; LED (A, B) green: Status of system power supply, field supply
Supply voltage (system) 24 VDC (-25 … +30 %); via pluggable connector (CAGE CLAMP® connection)
Input current (typ.) at nominal load (24 V) 500 mA
Power supply efficiency (typ.) at nominal load (24 V) 90 %
Power consumption (5 V system supply) 450 mA
Total current (system supply) 1,700 mA
Supply voltage (field) 24 VDC (-25 … +30 %); via power jumper contacts
Current carrying capacity (power jumper contacts) 10 A
Number of outgoing power jumper contacts 3
Isolation 500 V system/supply; BACnet MS/TP: 1500 V (per BACnet standard)
WSPCert certification in Vorbereitung
Connection data
Connection technology: communication/fieldbus BACnet MS/TP: 1 x Male connector; 4-pole; Modbus TCP/UDP: 2 x RJ-45
Connection technology: system supply 2 x CAGE CLAMP®
Connection technology: field supply 6 x CAGE CLAMP®
Connection type (1) System/field supply
Solid conductor 0.08 … 2.5 mm² / 28 … 14 AWG
Fine-stranded conductor 0.08 … 2.5 mm² / 28 … 14 AWG
Strip length 8 … 9 mm / 0.31 … 0.35 inch
Connection type 2 Communication/fieldbus: BACnet MS/TP
Solid conductor 2 0.2 … 2.5 mm² / 24 … 12 AWG
Fine-stranded conductor 2 0.2 … 2.5 mm² / 24 … 12 AWG
Strip length 2 9 … 10 mm / 0.35 … 0.39 inch
Connection technology: device configuration 1 x Male connector; 4-pole
Physical data
Width 61.5 mm / 2.421 inch
Height 100 mm / 3.937 inch
Depth 71.9 mm / 2.831 inch
Depth from upper edge of DIN-rail 64.7 mm / 2.547 inch
Mechanical data
Weight 168.9 g
Color light gray
Housing material Polycarbonate; polyamide 6.6
Conformity marking CE
Environmental requirements
Surrounding air temperature (operation) 0 … 55 °C
Surrounding air temperature (storage) -25 … 85 °C
Protection type IP20
Pollution degree (5) 2 per IEC 61131-2
Operating altitude without temperature derating: 0 … 2000 m; with temperature derating: 2000 … 5000 m (0.5 K/100 m); 5000 m (max.)
Relative humidity (without condensation) 95 %
Mounting position any
Mounting type DIN-35 rail
Vibration resistance per IEC 60068-2-6
Shock resistance 15g per IEC 60068-2-27
EMC immunity to interference per EN 61000-6-2
EMC emission of interference per EN 61000-6-3
Exposure to pollutants Per IEC 60068-2-42 and IEC 60068-2-43
Fire load 2.764 MJ
Permissible H2S contaminant concentration at a relative humidity 75 % 10 ppm
Permissible SO2 contaminant concentration at a relative humidity 75 % 25 ppm
Commercial data
Packaging type BOX
Country of origin DE
GTIN 4055143235310
Customs tariff number 85371091990
Approvals / Certificates
Additional Approval Text
Certificate name
Approval: UL
Underwriters Laboratories Inc. (HAZARDOUS LOCATIONS)
Additional Approval Text UL 121201
Certificate name: E198726 Sec.1
Country specific Approvals
Additional Approval Text
Certificate name
Approval: KC
National Radio Research Agency
Additional Approval Text Article 58-2, Clause 3
Certificate name: MSIP-REM-W43-PFC750
Other Approvals
Additional Approval Text
Certificate name
Approval: BACnet
WSP Cert
Additional Approval Text -
Certificate name: BTL Listing 30379
Additional Approval Text
Certificate name
Approval: UL
UL International Netherlands B.V. (ORDINARY LOCATIONS)
Additional Approval Text UL 508
Certificate name: E175199 Sec.1
CAE data
CAD data
Compatible products
Product family