The Best Rs485 Modem of 2025 – Reviewed and Top Rated
After hours researching and comparing all models on the market, we find out the Best Rs485 Modem of 2025. Check our ranking below.
2,512 Reviews Scanned
- 𝟑-𝐢𝐧-𝟏 𝐒𝐞𝐫𝐢𝐚𝐥 𝐏𝐨𝐫𝐭——The serial optic modem has 1Ch RS232 (Full Duplex), 2Ch RS485 (Half Duplex), 1Ch RS422 (Full Duplex)，which all support bi-directional transmission
- 𝐒𝐅𝐏 𝐏𝐨𝐫𝐭——The Serial to Fiber Converter adopts open SFP ports, which supports 100Base moudle. You can choose the right module according to your needs. It supports transmission distances of up to 80 km.
- 𝐄𝐚𝐬𝐲 𝐭𝐨 𝐔𝐬𝐞——It supports transparent transmission, self-adaptive baud rate. You don’t need to chang the user protocol, plug and play
- 𝐃𝐢𝐧-𝐑𝐚𝐢𝐥 & 𝐖𝐚𝐥𝐥 𝐌𝐨𝐮𝐧𝐭 𝐒𝐮𝐩𝐩𝐨𝐫𝐭——It has 35mm Din-rail mounting bracket and wall mount accessory
- 𝐈𝐏𝟒𝟎 𝐀𝐥 𝐂𝐚𝐬𝐞—— It uses industrial grade protection design，having 6KV lighting protection and can work at wide range temperature -25°C to 75°C (-13°F to 167°F)
- Bi-directional high Speed Serial Data – The Serial Optic Modem have 1ch RS232, 1Ch RS485, 2Ch high Speed RS485, all are Bi-directional. Serial data is fully transparent, baud rate is self-adaptive, no setting is required.
- High Speed RS485 RS422 – The Serial Fiber Extender's 2Ch RS485H can be grouped into 1Ch High Speed RS422 which can used for DMX512 communication in Stage Lighting Control.
- 12~48V DC Input – The RS232 /RS485 /RS422 fiber media converter support 12~48V DC Input. Wide range voltage makes it compatible with more DC power supply system.
- Industrial Grade Quality – Use industrial grade components and aluminum housing, it can work at wide range temperature -40°C to 75°C (-40°F to 167°F). You can use it in outdoor harsh environment.
- Din-Rail & Wall Mount –The media converter come with 35mm Din-rail Clip and Wall mount accessories.
- Single-mode communication distance up to 20 km.
- Support RS-232, RS-422 and RS-485 asynchronous communication protocols
- It supports asynchronous RS-232, RS-485, RS-422 communication interface, which is the best choice for connecting remote terminal unit (RTU) to host computer (HOST) or distributed data acquisition system (SCADA) controller.
- Optional SC, FC, ST interfaces are available.This is ST interface. If you need other interface types, please contact our customer service.
- Supports 2-wire (half-duplex) and 4-wire (full-duplex) RS-485 operation
- Work Mode: Transparent Mode, HTTPD Client Mode, SMS Mode
- TCP Server/Client,UDP, Modbus RTU to TCP
- RS485 to 4G modems
- Hardware watchdog
- SMS,NET,Serial AT command configuration
- Can be used as a standard HART protocol modem or HART to modbus accumulator
- DIN Rail Mounted (35mm)
- RS-485 port allows multiple modems on the same network
- Wide 5 to 30 Vdc supply range
- LED provides HART communications status
- 𝟑-𝐢𝐧-𝟏 𝐒𝐞𝐫𝐢𝐚𝐥 𝐏𝐨𝐫𝐭——The serial optic modem has 1Ch RS232 (Full Duplex), 2Ch RS485 (Half Duplex), 1Ch RS422 (Full Duplex)，which all support bi-directional transmission
- 𝐒𝐂 𝐏𝐨𝐫𝐭——The Serial to Fiber Converter applies to SC 1310nm single-mode fiber, which can transmit singal up to 20KM
- 𝐄𝐚𝐬𝐲 𝐭𝐨 𝐔𝐬𝐞——It supports transparent transmission, self-adaptive baud rate. You don’t need to chang the user protocol, plug and play
- 𝐃𝐢𝐧-𝐑𝐚𝐢𝐥 & 𝐖𝐚𝐥𝐥 𝐌𝐨𝐮𝐧𝐭 𝐒𝐮𝐩𝐩𝐨𝐫𝐭——It has 35mm Din-rail mounting bracket and wall mount accessory
- 𝐈𝐏𝟒𝟎 𝐀𝐥 𝐂𝐚𝐬𝐞—— It uses industrial grade protection design，having 6KV lighting protection and can work at wide range temperature -25°C to 80°C (-13°F to 176°F)
- Communication rate up to 460Kbps
- Optional SC, FC, ST interfaces are available
- Support point-to-point (point-to-multipoint) connection
- Support RS-232, RS-422 and RS-485 asynchronous communication protocols
- Supports 2-wire (half-duplex) and 4-wire (full-duplex) RS-485 operation
- 3 IN 1: Serial RS232/RS422/RS485 to fiber media converter, single Mode, dual fiber, SC, 20KM.
- Mini Size: 110mm*104mm*28mm black rugged case, support desktop and wall-mounted.
- Serial Distance: RS-232 port 15m, RS-422, RS-485: 1500 meters.
- Features: Hot-pluggable, 15KV ESD protection, Led Indicators PWR, TX and RX
- What You Get: One pair serial fiber converter, one for TX, one for RX. 2pcs 5V1A USA power adapter, 1pc user manual
- Hassle-free Protocol, Easy Adaptation It can be directly connected to the existing ModBus system without worrying about the problem of protocol matching
- High-precision Analog Acquisition It has been "calibrated"before leaving the factory to ensure AD acquisition accuracy.1%. Acquisition Accuracy three rounds of algorithm correction
- Supporting Virtual Serial Port Software.Seamless connection with various configuration software and touch screen
- Switch Input Photoelectric lsolation. Industrial-grade isolation protection to improve equipment reliability
- RS485 Cascade Expansion Through the built-in RS485 serial port,cascade expansion serial port I/O module, realize the simultaneous acquisition of multiple devices
Last update on 2026-03-27 / Affiliate links / Images from Amazon Product Advertising API
How Do You Buy The Best Rs485 Modem?
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- Is it worth buying an Rs485 Modem?
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This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:
- Brand Value: Every brand of Rs485 Modem 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.
- Features: What bells and whistles matter for an Rs485 Modem?
- Specifications: How powerful they are can be measured.
- Product Value: This simply is how much bang for the buck you get from your Rs485 Modem.
- Customer Ratings: Number ratings grade Rs485 Modem objectively.
- Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their Rs485 Modem.
- Product Quality: You don’t always get what you pay for with an Rs485 Modem, sometimes less, and sometimes more.
- Product Reliability: How sturdy and durable an Rs485 Modem is should be an indication of how long it will work out for you.
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FAQ:
Q: What is an IoT wireless RS485 modem?
A: Our new IoT Wireless RS485 modem makes it easy communicate with NCD wireless sensors over RS485 by simply opening a COM port and watching for incoming data to arrive as sensor data is broadcast. We have stripped away complexity and focused on what you need most, an easy way to get wireless data over a RS485 connection.
Q: What is the emulator version of the RS485 modem?
A: The Emulator Version of the RS485 modem is ideal for customers who are already using NCD wireless sensors and wish to adapt existing RS485 messages to follow NCD standards for device communications.
Q: What is GSM rs232/rs485 industrial serial to IP cellular GPRS modem?
A: Introduction of GSM Modem RS232/RS485 Industrial Serial to IP cellular GPRS modem which convert the serial data RS232/485 into IP data and then transfer to data center through GPRS 2.5G mobile network. USR-GPRS232-730 is based on USR-GM3.
Q: How does this wireless to RS485 gateway work?
A: This Wireless to RS485 Gateway was designed for indoor use only. Requires a 12VDC Power Supply (optional during checkout). This device operates at 900MHz and converts raw sensor data into raw RS-485 data. Compatible with Alpha Station https://ncd.io/alpha