BAS Portable Router BACnet/IP to MS/TP - Portable BACnet Router

Our review of the BAS Portable Router looks at a compact tool for controls technicians who need to bridge BACnet/IP and BACnet MS/TP networks on the go. The biggest reason to buy is simple: it reliably routes messages between Ethernet and MS/TP networks while drawing USB power from a laptop, making it a straightforward commissioning and troubleshooting companion for field work and temporary test setups. The review examines real-world connectivity, configuration convenience and the device's portability advantages for system integrators and building automation professionals.

Key Features

• BACnet routing: Routes messages between BACnet/IP and BACnet MS/TP networks to allow IP devices to communicate with MS/TP devices on a single project.
• Portable power: Attaches to a laptop USB port for power so technicians can carry and use the router without external power supplies during site visits.
• Web server configuration: Built-in web server makes commissioning, reconfiguring and troubleshooting convenient from any browser without extra software.
• MS/TP isolation: The MS/TP port uses an optically-isolated transceiver and removable terminal block for safer field connections and simple wiring changes.
• Ethernet convenience: Single 10/100 Mbps Auto-MDIX Ethernet port with shielded RJ-45 supports common network speeds and simplifies cabling.
• Diagnostic LEDs: Includes LEDs that monitor MS/TP traffic, helping confirm activity and speed up diagnostics on busy networks.

Who It's For

The BAS Portable Router is aimed at building automation technicians, system integrators and controls engineers who need a compact, portable solution to interconnect BACnet/IP and MS/TP segments during commissioning, testing or temporary deployments. Its USB power and web-based configuration suit users who frequently move between sites and prefer a low-footprint tool for troubleshooting.

Prospective buyers who need enterprise rack-mounted routers, multi-port managed BACnet gateways or persistent production infrastructure should look elsewhere; this unit is designed as a portable field router with a single MS/TP port and one Ethernet link rather than a full multi-port gateway for large permanent networks.

Pros & Cons

Pros

• Compact, laptop-powered design makes it easy to carry and use at multiple sites without extra power adapters.
• Web server configuration and diagnostic LEDs speed up commissioning and fault finding in the field.
• Optically-isolated MS/TP transceiver and removable terminal block simplify safe wiring and replacement in noisy industrial environments.
• Supports the full range of MS/TP baud rates, covering common field device configurations from 9.6 to 76.8 kbps.

Cons

• Single MS/TP port and one Ethernet port limit use as a permanent multi-segment gateway for larger installations.
• USB-powered portability means it is primarily a field tool and not intended as a standalone permanent network appliance.

Specifications

Protocol	BACnet/IP to BACnet MS/TP (ANSI/ASHRAE 135)
Ethernet	10/100 Mbps Auto-MDIX shielded RJ-45
MS/TP Port	Optically-isolated transceiver, removable 3-pin terminal block
MS/TP Baud Rates	9600 to 76800 bps
Power	USB powered from laptop port (portable)
Compliance	RoHS and CE Mark

Our Verdict

The BAS Portable Router is a practical, wellbuilt field tool for controls professionals who need reliable routing between BACnet/IP and MS/TP during commissioning and troubleshooting. Its USB-powered portability, web-based configuration and diagnostic LEDs make it good value for service work, though teams needing a permanent multi-port gateway should consider a different product. For on-the-go integration and testing, it is an efficient and cost-effective choice.

Frequently Asked Questions

Can the router be powered from a laptop USB port?
Yes. The portable version is designed to attach to a laptop USB port for power, eliminating the need for an external power supply during field use.

How many devices can be addressed on the MS/TP port?
The MS/TP port can address up to 127 devices on the bus, with a practical limit of as many as 31 full-load devices on the local bus segment.

How is the router configured on site?
The unit includes a built-in web server for configuration, reconfiguration and troubleshooting via a browser without requiring additional software.