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The Best Rs485 Optical Isolator of 2022 – Reviewed and Top Rated

After hours researching and comparing all models on the market, we find out the Best Rs485 Optical Isolator of 2022. Check our ranking below.

2,403 Reviews Scanned

SaleRank No. #1
RS485 Signal Repeater Optical Isolator Anti Thunder Optoelectronic Isolation High Speed Transmission Hub for Expand Transmission Distance
  • DESCRIPTION: The YN2209 isolated repeater is an active isolated RS‑485 repeater designed to solve the industrial complex electromagnetic environment. The external power supply can ensure the stability and reliability of the equipment during long‑term operation
  • ADVANTAGE: YN2209 optical isolator can extend the existing RS485 by 1200m to solve the problem of signal attenuation caused by too long RS485 wiring. The baud rate supported at the same time is up to 115.2kpbs
  • PROTECTION FUNCTION: The photoelectric technology isolation of this RS485 converter can ensure that the equipment is not damaged by the ground loop and the common mode voltage difference during the communication process
  • WIDE APPLICATION: The optical isolation splitter can be widekly used for video surveillance, building intercom, PLC, card access control, power acquisition, time attendance, etc.
  • WORKING PRINCIPLE: The direction control of the RS‑485 repeater bus is automatically completed by the on‑board microprocessor, without software intervention, and the YN2209 can work in an industrial‑grade temperature and humidity environment
Rank No. #2
ATNEDCVH RS232 RS485 to 4 Ports RS485 Repeater Optical Isolator Industrial Grade, RS485 hub 4 in 1 Out Signal Amplifier Anti-Interference (Blue)
  • RS232 RS485 to 4 Ports RS485 repeater/hub. This is a RS485 repeater / hub specially designed for industrial automation communication. It solves the networking of RS485 bus star structure and the requirements of RS485 large system in complex electromagnetic environment.
  • It supports transmission rate up to 115.2kbps, and adopts optical isolation technology in the RS485 terminal. High performance transient voltage suppressor, 600W protect against surges circuit,Providing 1000V isolation voltage can effectively ESD protection. It effectively optocoupler isolate the RS485 signal from the main and auxiliary ends, and has 4 independent isolated auxiliary stations. Effectively do power supply isolating between the main port and the auxiliary port.
  • The built-in conversion processor automatically senses the direction of data flow. Automatically judge the channel status, automatically switch the enabling control circuit,It is easy to solve the delay problem of RS485 transceiver conversion.No jumper setting is needed to realize full asynchronous half duplex (RS485) mode conversion.Plug and play.
  • Signal isolation, power isolation, two-way transmission, enhanced anti-interference, extended communication distance. Support multiple device hand-in-hand connections, or multiple device cascade connections networking. It is easy to install. It can be installed by 35mm standard guide rail or other ways ( (Not included 35mm guide rail).
  • The RS485 terminal transmission distance is more than 3000 meters, stable performance. Adopt external power supply, safe and reliable, suitable for outdoor, provide DC 9 ~ 40V wide voltage input. Widely used in highway toll system, road monitoring system and electric power collection system, it is a data communication product with excellent performance.
Rank No. #3
COMMFRONT Industrial RS485 / RS422 Isolator/Repeater/Converter, 2500V Optical Isolation, 600W Surge and 15kV ESD Static Protection, DIN-Rail/Wall/Panel Mount
  • Rugged industrial-grade RS485 / RS422 isolator / repeater / converter
  • Isolates one group of RS485 / RS422 equipment from another, converts 2-wire RS485 to 4-wire RS422, or extends RS485 / RS422's distance for 4000 feet (1.2 km)
  • 2500V optical isolation
  • 300 to 115.2K Baud operation, auto-sensing & self-adjusting, RS-485 / RS-422 auto-detection, no software drivers or manual setting is required
  • Operating temperature: -40ºF to 185ºF (-40ºC to 85ºC). Built-in 600W surge protection, 15kV static protection and circuit protection
Rank No. #4
Industrial Grade Photoelectric Isolation RS-485 Signal Repeater DC/DC Isolated Power Module Amplifier Converter
  • INDUSTRAIL GRADE: Industrial grade design, communication is completely isolated, stable and reliable performance, transmission rate is up to 500Kbps
  • MULTI-MACHINE COMMUNICATION: Support multi-machine communication, can connect up to 128 nodes, and transmission distance is up to 1200 meters
  • DC TO DC MODULE AND DATA FLOW CONTROL: Built-in high-quality DC/DC isolated power supply module realizes electrical isolation between ports. Data flow automatic control technology, automatically distinguish and control data transmission direction
  • INSTRUCTION: Indicator Light; PWR: Green power supply indicator light, normally on when power on. COM: Red data indicator light, flashes when there is data on bus. Terminal Definition; DC9V: power supply. G: Isolate RS-485 ground, can connect to earth or shielded wire. A: RS-485 signal input/output positive. B: RS-485 signal input/output negative
  • MULTIPLE PROTECTIVE MEASURES: Positive and negative 15KV ESD protection; 600W dual channel TVS protection; 2.5KV communication isolation. Wide range of power supply from 9V to 36VDC, and support reverse polarity protection
SaleRank No. #5
4‑Channel Industrial Grade Repeater, RS485 Hub with Built‑in Dc/dc Isolated Power Supply Module Photoelectric Isolation Repeater
  • EXCELLENT PERFORMANCE: Industrial‑grade design, complete communication isolation, stable performance and transmission rate up to 115.2Kbps.
  • ISOLATED POWER SUPPLY MODULE: Built‑in DC/DC isolated power supply module to achieve electrical isolation between ports.
  • SPECIFIC FEATURES: Support multi‑machine communication, each channel can connect up to 128 nodes, and the longest transmission distance is 2500 meters.
  • AUTOMATICALLY IDENTIFY DATA FLOW: Data flow automatic control technology, automatically distinguish and control the data transmission direction.
  • MULTIPLE PROTECTION MEASURES: Plus or minus 15KV ESD protection, 600W dual‑channel TVS protection 2.5KV communication isolation.
Rank No. #6
ACEIRMC 3pcs ADUM1201 Dual Channel Digital Magnetic Isolator Replace Optocouplers
  • Lower power consumption than the same data transfer rate when the traditional optical isolator 1/10, the minimum operating current 0.8mA.
  • Application: RS-232/RS-422/RS-485 transceiver isolation
  • The smaller the integration, the printed circuit board (PCB) area of 40% of the traditional photoelectric isolator.
  • Performance higher timing accuracy, transient common mode rejection, the degree of matching between channels are better than the traditional optical isolator.
  • ADUM1201 Dual Channel Digital Magnetic Isolator Replace Optocouplers
Rank No. #7
DTech Active Isolated RS232 to RS485 RS422 Converter with RJ45 Serial Port Terminal Board Power Adapter DB9 Cable Optical Isolation Protection 2.5kV
  • Industrial grade isolated RS232 to RS485 converter for High Speed data communication between DB9 serial COM port and RS-485/422 device (wired via RJ45 socket or 6 position terminal board)
  • Provides Power Supply Isolation (optical isolation voltage 2500Vrms 500DC continuity); RS-232 interface - 15kV ESD protection; RS485/422 end with each line of 600W lightning surge protection
  • Port-powered or by DC 9V-24V power adapter; LED indicators for troubleshooting - easy check in the status of power connection and balanced differential signal status
  • Rack-mounted optocoupler with built-in repeater to amplify signals; with automatic baud rate sensing (300bps to 115200 bps); well housed in metal case ensures rapid heat dissipation
  • Bi-directional RS485 to RS232 isolator box supports 4 kinds of data communication: point-to-point/point-to-multilpoint 4-wire full duplex; point-to-point/point-to-multilpoint 2-wire half duplex
Rank No. #8
NOYITO PC817 4-Channel Optocoupler Isolation Board Voltage Converter Adapter Module 3.6-30V Driver Photoelectric Isolated Module
  • This module is used when it comes to the need for isolation control and voltage conversion.
  • Drive terminal signal voltage: 3.6-24V. Output terminal voltage range: 3.6-30V (output current depends on the specific situation but the maximum does not exceed 10MA, the total power is constant, the voltage and current are inversely proportional)
  • It can realize 3.3V or 5V to control the interface of 3.6-30V voltage . After the control terminal is turned on, the controlled terminal will also be turned on.
  • Photoelectric isolation has strong anti-interference ability. It can drive high-power triodes, MOS tubes and other applications that require high-voltage driving, and can also directly drive low-power 24V relays.If it is a pulse signal, please note that the limit of 817 is 4KHZ or less. If the control signal is greater than 4KHZ, please do not use this module, it will not work properly.
  • 【8-Channel Optocoupler Isolation Board ASIN : B09RGTBDKJ 】 NOYITO PC817 4-Channel Optocoupler Isolation Board User Manual https://1drv.ms/u/s!AlzQUCOyZQhKgT98ibtG22R8W5eQ?e=VfKbrK
SaleRank No. #9
HiLetgo 2pcs ADUM1201 Dual Channel Digital Magnetic Isolator Replace Optocouplers
  • Higher speed can reach 125Mbps.
  • Lower power consumption than the same data transfer rate when the traditional optical isolator 1/10, the minimum operating current 0.8mA.
  • Performance higher timing accuracy, transient common mode rejection, the degree of matching between channels are better than the traditional optical isolator.
  • The smaller the integration, the printed circuit board (PCB) area of 40% of the traditional photoelectric isolator.
  • Application: RS-232/RS-422/RS-485 transceiver isolation
SaleRank No. #10
DTECH Industrial Grade RS232 to RS485 Converter Adapter Optical Isolation Protector with TX RX LED Lights for Long Haul Serial Communication
  • Mini size isolated RS232 to RS485 converter with 2.5KVrms /500VDC photoelectric isolation voltage helps you get the precise data and prevent your valued devices from damage
  • RS485 to RS232 optical isolator supports 600W double lightning surge protection and 15KV static protection protects your value devices against high voltage spikes created by either by static electricity or by surges in the supply voltage
  • Industrial Grade conversion adapter with TX and RX indicators enables you to easily know the status of sending or receiving data respectively
  • RS 232 to 485 opto isolator serial adapter supports 2 wire half duplex communication, point to point and point to multi-point network (up to 32 drops RS-485 protocol devices)
  • The baud rate will be detected and adjusted automatically, up to 115200 bps; RS485 isolator is port powered from RS-232 signal, no external power required

Last update on 2023-07-25 / Affiliate links / Images from Amazon Product Advertising API

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  1. Brand Value: Every brand of Rs485 Optical Isolator has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an Rs485 Optical Isolator?
  3. Specifications: How powerful they are can be measured.
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