BACnet/IP Fieldbus system
What is BACnet/IP?
BACnet (Building Automation and Control network) is a manufacturer-independent protocol that is used for building automation. BACnet enables communication between devices from different manufacturers without special interface adaptations. The high level of interoperability due to standardized, detailed rules and structures for communication exchange is the most important advantage over other communication protocols in the building automation sector. BACnet is often used when it comes to networking smart buildings.
![[Translate to Englisch:] BACnet](/fileadmin/_processed_/6/7/csm_bacnet_1__9228544b5b.webp "[Translate to Englisch:] BACnet")
ASi BACnet/IP Gateway
The ASi-3 BACnet/IP gateway in stainless steel provides an interface for a BACnet/IP fieldbus. All gateways also have an Ethernet diagnostic interface for convenient diagnostics. They also include an OPC UA server, which can be used to transfer all process data and additional information to the IT world. One product variant offers data decoupling integrated in the gateway.All gateways also have an Ethernet diagnostic interface for convenient diagnostics. They also include an OPC UA server, which can be used to transfer all process data and additional information to the IT world. One product variant offers data decoupling integrated in the gateway.
BACnet/IP ASi
| Figure | Model | Communication interface between fieldbus and gateway: interfaces for standardized fieldbus systems in industrial automation. Bihl+Wiedemann offers a wide range of gateways for common fieldbus interfaces:
| The device communicates via the standard ASi-3 and/or ASi-5. | Standard devices"Single Master": 1 ASi network, 1 ASi-5/ASi-3 Master. 1 ASi network, 1 ASi-3 Master. 2 ASi networks, 2 ASi-5/ASi-3 Masters. 2 ASi networks, 2 ASi-3 Masters. Safety devices "Single Master" : 1 ASi network, 1 ASi-5/ASi-3 Master. 1 ASi network, 1 ASi-3 Master. 2 ASi networks, 2 ASi-5/ASi-3 Masters. 2 ASi networks, 2 ASi-3 Masters. | " yes, max. 4 A/ASi network ": Data decoupling integrated in the gateway. Cost-effective power for 2 ASi networks with 1 power supply (optionally supply of multiple Single Gateways by 1 power supply). Operation with short cable lengths with standard 24 V power supply possible.
Data decoupling integrated in the gateway. Cost-effective power for 2 ASi networks with 1 power supply (optionally supply of multiple Single Gateways by 1 power supply). Operation with short cable lengths with standard 24 V power supply possible.
Data decoupling integrated in the gateway. Optimized for use with 2 x UL certified 30 V/3 A power supplies with power limitation <100 W (BW4223). In combination 2 separate NEC Class 2 compliant ASi circuits are created.
1 ASi power supply per ASi network. Gateway is powered in normal operation from one of the two ASi power supplies. Should one ASi power supply fail, switching to the other ASi power supply allows all the diagnostics functions to be maintained and the unaffected ASi network continues to operate.
1 ASi power supply per ASi network. | Access to ASi master and safety monitor via own software from Bihl+Wiedemann using the diagnostic interface (e.g. USB, RJ45, RS232). For certain devices with Ethernet-based fieldbus (PROFINET, EtherNet/IP), there is also the option of diagnostics and configuration directly via the fieldbus interface.
The latest version of the device description file of the gateway/gateway with integrated safety monitor (GSD, GSDML, EDS, etc.) is available in the "Downloads" section of the respective device. | Detects whether the same address has been assigned to two ASi nodes. Frequent error when using a handheld addressing device. | Checks the ASi line for interference effects such as noise, external voltages, ... | Using a C-program offers the possibility to run mini-PLC functions with a gateway. | Article No. |
|---|---|---|---|---|---|---|---|---|---|---|
 |
Gateway
|
BACnet/IP, OPC UA, REST API
|
ASi-3 compatible
|
2 ASi networks, 2 ASi-3 Masters
|
yes, max. 8 A/ASi network
|
Ethernet diagnostic, Ethernet fieldbus
|
yes
|
yes
|
optional
| BWU4778 ASi-3 BACnet/IP Gateway in stainless steel, 2 ASi-3 Masters |
 |
Gateway
|
BACnet/IP, OPC UA, REST API
|
ASi-3 compatible
|
2 ASi networks, 2 ASi-3 Masters
|
no, max. 8 A/ASi network, redundant supply
|
Ethernet diagnostic, Ethernet fieldbus
|
yes
|
yes
|
optional
| BWU3356 ASi-3 BACnet/IP Gateway in stainless steel, 2 masters |
Safety, BACnet/IP ASi Gateways with integrated Safety Monitor
The certified ASi gateways with integrated safety monitor are available in different versions with protection class IP20. All gateways feature the Safe Link technology, which makes it possible to connect different system components easily and flexibly. In addition, they all offer an OPC UA interface that transmits sensor data to the IT system.
Safety, BACnet/IP ASi Gateways with integrated Safety Monitors
- Safety, BACnet/IP
| Figure | Model | Communication interface between fieldbus and gateway: interfaces for standardized fieldbus systems in industrial automation. Bihl+Wiedemann offers a wide range of gateways for common fieldbus interfaces:
| The device communicates via the standard ASi-3 and/or ASi-5. | Standard devices"Single Master": 1 ASi network, 1 ASi-5/ASi-3 Master. 1 ASi network, 1 ASi-3 Master. 2 ASi networks, 2 ASi-5/ASi-3 Masters. 2 ASi networks, 2 ASi-3 Masters. Safety devices "Single Master" : 1 ASi network, 1 ASi-5/ASi-3 Master. 1 ASi network, 1 ASi-3 Master. 2 ASi networks, 2 ASi-5/ASi-3 Masters. 2 ASi networks, 2 ASi-3 Masters. | " yes, max. 4 A/ASi network ": Data decoupling integrated in the gateway. Cost-effective power for 2 ASi networks with 1 power supply (optionally supply of multiple Single Gateways by 1 power supply). Operation with short cable lengths with standard 24 V power supply possible.
Data decoupling integrated in the gateway. Cost-effective power for 2 ASi networks with 1 power supply (optionally supply of multiple Single Gateways by 1 power supply). Operation with short cable lengths with standard 24 V power supply possible.
Data decoupling integrated in the gateway. Optimized for use with 2 x UL certified 30 V/3 A power supplies with power limitation <100 W (BW4223). In combination 2 separate NEC Class 2 compliant ASi circuits are created.
1 ASi power supply per ASi network. Gateway is powered in normal operation from one of the two ASi power supplies. Should one ASi power supply fail, switching to the other ASi power supply allows all the diagnostics functions to be maintained and the unaffected ASi network continues to operate.
1 ASi power supply per ASi network. | Access to ASi master and safety monitor via own software from Bihl+Wiedemann using the diagnostic interface (e.g. USB, RJ45, RS232). For certain devices with Ethernet-based fieldbus (PROFINET, EtherNet/IP), there is also the option of diagnostics and configuration directly via the fieldbus interface.
The latest version of the device description file of the gateway/gateway with integrated safety monitor (GSD, GSDML, EDS, etc.) is available in the "Downloads" section of the respective device. | Safety communication | Safe inputs can be configured as 1-channel or 2-channels depending on the desired application or PL and SIL level.
| Suitable for applications up to category 4/PLe/SIL 3. | Detects whether the same address has been assigned to two ASi nodes. Frequent error when using a handheld addressing device. | Checks the ASi line for interference effects such as noise, external voltages, ... | Using a C-program offers the possibility to run mini-PLC functions with a gateway. | Article No. |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 |
Gateway with integrated Safety Monitor
|
BACnet/IP, OPC UA, REST API
|
ASi-3 compatible
|
2 ASi networks, 2 ASi-3 Masters
|
yes, max. 8 A/ASi network
|
Ethernet diagnostic, Ethernet fieldbus
|
Safe Link
|
3 x 2 channels
|
6 release circuits, 6 x electronic safe outputs
|
yes
|
yes
|
optional
| BWU4780 ASi-3 BACnet/IP Gateway with integrated Safety Monitor, 2 ASi-3 masters |
 |
Gateway with integrated Safety Monitor
|
BACnet/IP, OPC UA, REST API
|
ASi-3 compatible
|
2 ASi networks, 2 ASi-3 Masters
|
no, max. 8 A/ASi network, redundant supply
|
Ethernet diagnostic, Ethernet fieldbus
|
Safe Link
|
3 x 2 channels
|
6 release circuits, 6 x electronic safe outputs
|
yes
|
yes
|
optional
| BWU4001 ASi-3 BACnet/IP Gateway with integrated Safety Monitor, 2 ASi masters |
