BASRTSX-B | BACnet/IP to MS/TP to Ethernet Router with SSL | Contemporary Controls

The BASrouterSX is a high-performance BACnet router that provides stand-alone routing between BACnet networks such as BACnet/IP, BACnet Ethernet (ISO 8802-3), and BACnet MS/TP. The BASrouterSX-GSA is a GSA-compliant model which has been tested and approved for use in U.S. government buildings.

Besides a high speed processor, the routers have advanced features such as MS/TP Backbone, Backward Routing, Allowlist option for enhanced security, MS/TP slave proxy support (allowing auto-discovery of MS/TP slaves), and MS/TP frame capture and storage for use with Wireshark®. An MS/TP Status webpage features a graphical table that provides real-time status of all BACnet MS/TP devices on the network. As a BACnet/IP Broadcast Management Device (BBMD), up to 50 BDT and 147 Foreign Device Registration (FDR) entries can be supported. The BASrouterSX has two physical communication ports—a 10/100 Mbps BACnet/IP Ethernet port and an optically-isolated EIA-485 port for MS/TP. Router configuration is accomplished via web pages using HTTPS (HTTP over SSL) that provides encrypted webpage communications with the BASrouterSX.

The BASrouterSX is housed in a metal case available as 35-mm DIN-rail mount (BASRTSX-B) or Panel mount (BASRTSX-B/P) model. The BASrouterSX-GSA is housed in a metal case available as 35-mm DIN-rail mount model (BASRTSX-B-GSA). Powered from a 24 VAC/VDC (± 10%) source, their half-wave rectified power supply design allows sharing of power with other half-wave devices. There are two ports on the unit — one Ethernet and one EIA-485.

The optically-isolated EIA-485 serial port allows for connection to either 2-wire or 3-wire MS/TP networks using a removable 5-pin terminal block. Up to 31 full-load or 62 half-load EIA-485 devices can share the serial bus at data rates between 9.6 and 115.2 kbps. A 2-pin DIP switch is accessible from the front of the unit that can provide 120 Ω termination and bias.

The Ethernet port offers a shielded RJ-45 connector. Through auto-negotiation and Auto-MDIX, it automatically matches connections to the attached equipment. Thus, either straight-through or crossover Ethernet cable can be used to attach to the BACnet/IP network at either 10 or 100 Mbps.

MS/TP slave devices do not participate in token passing but can be made assessable throughout the complete MS/TP address range using either Manual Slave Address Binding or Automatic Slave Discovery. Once they are known, the BASrouters functions as their proxy.

A resident HTTPS web server allows for secure commissioning and troubleshooting via a standard web browser. A reset switch is provided on the router to return the unit to the factory default IP and password settings. Five LEDs are provided. The power LED indicates that proper power is being provided. Two Ethernet LEDs indicate link status, data activity, and data rate. Two EIA-485 LEDs indicate transmission and reception of data.