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BACnet MSTP

BACnet MSTP (Master-Slave/Token-Passing) is a communication protocol used in building automation and control systems. It's a part of the BACnet (Building Automation and Control Networks) family of protocols, which are standards for communication in building automation systems such as HVAC (Heating, Ventilation, and Air Conditioning), lighting control, access control, and fire detection systems. Here are some key aspects of BACnet MSTP:

BACnet MSTP (Master-Slave/Token-Passing) is a communication protocol used in building automation and control systems. It’s a part of the BACnet (Building Automation and Control Networks) family of protocols, which are standards for communication in building automation systems such as HVAC (Heating, Ventilation, and Air Conditioning), lighting control, access control, and fire detection systems. Here are some key aspects of BACnet MSTP:

  1. BACnet Standard: BACnet is an industry-standard protocol designed to allow communication and interoperability between different building automation devices regardless of the manufacturer. It was developed by ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers).
  2. Master-Slave/Token-Passing Mechanism: In BACnet MSTP, data communication is managed using the master-slave/token-passing method. This means that one device (the master) controls the access to the network and passes a token to other devices (slaves), giving them permission to communicate on the network. This ensures organized and collision-free communication between devices.
  3. Physical Layer: BACnet MSTP typically operates over an RS-485 physical layer. RS-485 is a standard defining the electrical characteristics of drivers and receivers for use in serial communications systems, and it’s suitable for multi-drop networks.
  4. Data Transmission: It can transmit data at various speeds, typically ranging from 9.6 Kbps to 76.8 Kbps. The slower transmission rates are often sufficient for the types of data communicated in building automation systems and allow for longer cable runs.
  5. Network Structure: BACnet MSTP is well-suited for small to medium-sized building automation networks. It can support up to 127 devices on a single network segment. For larger systems, BACnet/IP (which uses Ethernet and IP networking standards) is often used.
  6. Applications: BACnet MSTP is commonly used in HVAC control systems, lighting control, and other building management systems. It’s chosen for its reliability, ease of implementation, and compatibility with a wide range of control devices.
  7. Interoperability: One of the key advantages of BACnet, including MSTP, is its emphasis on interoperability. Devices from different manufacturers that are BACnet compliant can communicate and work together over a BACnet network.

BACnet MSTP is an important protocol in the field of building automation, providing a standardized, reliable means of communication between various devices and systems within a building’s infrastructure.

ANC-100e Ethernet IP to AB's DH+ Converter

The Automation Networks ANC-100e communicates with all SCADA, HMI, PLC programming with direct Ethernet/IP access to the DH+ network and stations. 

ANC-100e has similar replacement features as the Controllogix 1756-DHRIO / 1756-ENBT, and AB 1784 Interface Cards: 1784-U2DHP, 1784-KTx, 1784-PKTx, 1784-PCMK and Prosoft AN-X2-DHRIO Converters.

$1,295 USD List. Jan. 1, 2024

Overnight Shipping Available

ANC-120e USB to AB's DH+

The ANC-120e is an economical and high performance USB-to-Allen-Bradley Data Highway Plus converter interfacing major HMI, SCADA, PLC Programming packages to Devices on DH+. Its features significantly outperform AB’s 1784-U2DHP PLC Programming Cable operating at 12 Mg USB speed with the Controllogix Ethernet/IP Driver.

The ANC-120e works with all SCADA, MMI, PLC programming packages installed on your PC with USB direct access to the DH+ network and stations. These packages include RSLINX/LOGIX Classic & Enterprise with RSLOGIX 5/500, Wonderware DAServer & TCP/IO Server, Citect, and Kepware using Controllogix Ethernet/IP Drivers. 

$1,295 USD List. Jan 1, 2024

Overnight Shipping Available

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