Product Overview
B&B Electronics 485OP Optical Isolator/Reapter for RS-422/RS-485 – Used
Presented here is a B&B Electronics 485OP optical isolator and repeater for RS-422 and RS-485 serial networks, used to regenerate signals and provide galvanic isolation between segments.
Industrial serial networks are tough until they are not. The moment ground loops, long runs, or noisy cabinets show up, an optical isolator becomes the quiet referee that keeps data moving and equipment protected.
Product Condition
This unit is used and in good condition. It shows normal signs of prior handling consistent with installed equipment. A 12 VDC power adapter is not included.
Product Overview
The B&B Electronics 485OP is designed for RS-485 and RS-422 environments where isolation and signal repeating are needed to maintain communication reliability. Optical isolation helps break ground potential differences between connected devices, while the repeater function can improve signal integrity across longer cable runs or segmented networks. Units like this are commonly used in automation, instrumentation, and industrial monitoring systems that rely on robust serial communications.
Key Features
- Model: B&B Electronics 485OP
- Function: optical isolation plus signal repeating
- Supports RS-422 and RS-485 serial communications
- Helps mitigate ground loops and ground potential differences
- Useful for improving signal integrity on longer runs or segmented networks
- Industrial communications accessory for control and monitoring systems
- Requires 12 VDC power input (power adapter not included)
Applications
- Isolating RS-485 networks between separate grounded panels
- Extending or segmenting RS-485/RS-422 serial bus runs
- Protecting PLC, RTU, and instrumentation serial ports from ground loops
- Improving reliability for Modbus RTU and other RS-485-based protocols
- Adding isolation between building automation controllers and field devices
- Industrial monitoring and data acquisition serial links
Frequently Asked Questions
Is the power adapter included?
No. A 12 VDC power adapter is not included.
Does this work with RS-485 and RS-422?
Yes. The 485OP is intended for RS-422 and RS-485 serial communication environments.
Is this a converter from RS-232 to RS-485?
No. This unit is an optical isolator and repeater for RS-422/RS-485. It is not described as an RS-232 converter.
What problem does optical isolation solve?
Optical isolation helps reduce issues caused by ground loops and differences in ground potential between connected devices, which can disrupt communication or stress equipment interfaces.
What should I confirm before buying?
Confirm your wiring, connector needs, network topology, and that you have a compatible 12 VDC power source available.
Some devices make the network faster; this one keeps it honest. Drop the 485OP into the line, feed it 12 VDC, and let your serial link get back to doing its job.
