USB to RS-485 Converter with 2-Wire Terminal Block & Galvanic Isolation
The B+B SmartWorx BB-485USBTB2WLS-A is a professional-grade USB to RS-485 converter engineered for demanding industrial environments. This isolated converter combines galvanic isolation, surge protection, and a rugged metal enclosure to deliver reliable serial communication in harsh field conditions. With its 2-wire terminal block interface, locking USB connector, and wide operating temperature support, this converter is ideal for factory automation, SCADA systems, building management, and remote sensor networks requiring robust, noise-immune data transmission.
Key Features
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Galvanic Isolation — Eliminates ground loop noise and protects connected equipment from voltage spikes
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2-Wire Terminal Block Interface — Secure, tool-free connections for RS-485 A/B lines and ground
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Wide Temperature Operation — Rated for extended temperature ranges to support outdoor and uncontrolled environments
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Surge Protection — Integrated protection against transient overvoltage and ESD events
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Locking USB Connector — High-retention design prevents accidental disconnection during operation
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Metal Enclosure — Durable, shielded housing provides EMI/RFI protection and mechanical durability
- Plug-and-play USB installation with standard drivers
- Compact form factor suitable for panel mounting or desktop use
Technical Specifications
| Specification |
Details |
| Manufacturer |
B+B SmartWorx |
| Part Number |
BB-485USBTB2WLS-A |
| Interface Type |
USB to RS-485 (2-wire) |
| Connector Type |
2-Wire Terminal Block (RS-485); Locking USB Type-A (Host) |
| Isolation |
Galvanic Isolation (Opto-isolated) |
| Surge Protection |
Integrated TVS diodes and transient suppression |
| Operating Temperature |
Wide industrial range (consult datasheet for exact limits) |
| Enclosure |
Metal case with EMI/RFI shielding |
| USB Cable |
High-retention, integrated or detachable |
| Power Supply |
USB-powered (5V from host) |
| Data Rate |
Up to 115.2 kbps (standard RS-485 speeds) |
Frequently Asked Questions
What is a USB to RS-485 converter used for?
A USB to RS-485 converter bridges modern computers and industrial devices by converting USB signals to RS-485 serial protocol. It's essential for connecting legacy industrial equipment, sensors, PLCs, and distributed I/O modules to PCs, laptops, and industrial controllers that lack native RS-485 ports.
Why is galvanic isolation important in industrial converters?
Galvanic isolation in an isolated converter prevents ground loop currents and protects your computer and connected devices from high-voltage transients common in factory floors, power distribution systems, and outdoor installations. This protection extends equipment lifespan and ensures data integrity.
Can this converter handle outdoor or high-temperature environments?
Yes. The BB-485USBTB2WLS-A features wide temperature operation and a rugged metal enclosure with integrated surge protection, making it suitable for outdoor cabinets, HVAC systems, renewable energy installations, and other uncontrolled temperature environments.
Is the USB connector secure enough for industrial use?
Absolutely. The locking USB connector with high-retention design prevents accidental disconnection during vibration or movement, a critical requirement in mobile equipment, vehicles, and high-vibration industrial settings.
