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Serial Converters/Repeaters/Isolators (310)

Reliable Serial Communication
Choose serial converters, repeaters and isolators by interface, port count, baud rate, isolation, connector type, DIN rail format, driver support and cable distance

DistriNode serial converters, repeaters and isolators help connect legacy devices, PLCs, meters, POS terminals, access control, CNC equipment, routers, servers and industrial controllers where RS-232, RS-422, RS-485, USB or Ethernet links must stay stable. Compare USB-to-serial adapters, multi-port converters, repeaters for longer cable runs, opto-isolated interfaces, surge protection, screw terminals, DB9 connectors, DIN rail housings, Windows and Linux drivers, Modbus use, half-duplex or full-duplex wiring and whether the link is for commissioning, permanent automation, service laptops or electrically noisy environments.

310 products66 brandsUSB -> RS-485Official distributor

How to Choose Serial Converters

Match the standard
RS-232, RS-422 and RS-485 use different wiring, distance and signalling rules.
Check isolation
Optical isolation protects equipment when ground loops or industrial noise are possible.
Plan drivers
Service laptops, servers and embedded systems may need specific chipset support.
Respect distance
Repeaters and proper termination help long RS-485 runs stay reliable.

What You Will Find Here

USB to Serial AdaptersRS-232 ConvertersRS-485 RepeatersSerial IsolatorsRS-422 AdaptersDIN Rail ConvertersDB9 Serial AdaptersModbus InterfacesMulti-Port Serial CardsIndustrial Serial Links

Leading Serial Interface Brands

DELOCKMOXAStarTechEXSYSROLINEATENDIGITUSMANHATTANLINDYINLINERENKFORCEEQUIPUNITEKACTLOGILINKMICROCONNECTWENTRONICAXAGON
Integration tip: Write down the serial standard, connector, baud rate and wiring mode before replacing a converter.

Frequently Asked Questions

Can RS-232 and RS-485 be connected directly?
No. They need a proper converter because signalling and wiring are different.
When is isolation needed?
Use isolation when devices are powered from different sources or the environment has electrical noise.
Why do some USB serial adapters fail with old devices?
Chipset drivers, voltage levels and handshake lines may not match the equipment.
Brand: EXSYS Stock: 2
The EX-6131-2POE stands out by combining Power over Ethernet with dual serial interfaces—one RS-232 and one software-selectable RS-422/485—in a rugged..
Interface Type Serial Product Type Serial Protocol Converter Connector B Terminal Block Isolation & ... No
R6,063
Ex Tax:R5,272
1 supplier Reward +R23
Add to Cart
Brand: EXSYS Stock: 6
In industrial automation environments where RS-485 networks span long distances or connect equipment with different ground potentials, the EXSYS EX-47..
Product Type Serial Repeater / Hub Isolation & ... No Primary Seri... RS-485
R3,795
Ex Tax:R3,300
1 supplier Reward +R13
Add to Cart
Brand: EXSYS Stock: 9
Legacy RS-422/485 serial equipment often lacks a direct Ethernet connection, making integration into modern IP networks difficult. The EXSYS EX-6051IS..
Interface Type Serial Product Type Serial Protocol Converter Number of Po... 1 Port Connector B Terminal Block
R3,419
Ex Tax:R2,973
1 supplier Reward +R12
Add to Cart
Brand: EXSYS Stock: 23
Embedded developers and industrial integrators often need to connect legacy RS-232 equipment to modern TTL-based microcontrollers or sensors. The EXSY..
Connector B Terminal Block Primary Seri... RS-232
R1,564
Ex Tax:R1,360
1 supplier Reward +R5
Add to Cart
Brand: EXSYS Stock: 5
The EX-6051POE stands out by combining Ethernet connectivity with a single RS-422/485 serial port and Power over Ethernet support, eliminating the nee..
Interface Type Serial Product Type Serial Protocol Converter Number of Po... 1 Port Connector B Terminal Block
R3,418
Ex Tax:R2,972
1 supplier Reward +R12
Add to Cart
Brand: EXSYS Stock: 2
The EXSYS EX-1339HMV consolidates eight serial ports into a single USB 2.0 connection, supporting RS-232, RS-422, and RS-485 standards per port. Its m..
Interface Type USB Type-B Product Type Multi-Port USB Serial Hub Number of Po... 8 Ports Connector B DB9
R10,199
Ex Tax:R8,869
1 supplier Reward +R39
Add to Cart
Brand: EXSYS Stock: 15
Connect legacy RS-232 equipment to modern RS-422 or RS-485 networks in industrial automation, building management, or laboratory settings. This conver..
Interface Type Serial Connector B Terminal Block Primary Seri... RS-485
R1,579
Ex Tax:R1,373
1 supplier Reward +R5
Add to Cart
Brand: EXSYS Stock: 2
Connect legacy RS-232 serial devices to modern Ethernet networks with the EXSYS EX-6031 Ethernet Data Gateway. This robust metal-enclosed gateway brid..
Interface Type Serial Product Type Serial Protocol Converter Number of Po... 1 Port Connector B 2.5 mm Jack
R3,084
Ex Tax:R2,682
1 supplier Reward +R11
Add to Cart
Brand: EXSYS Stock: 2
Convert RS-232 signals to RS-422 or RS-485 with 2.5kV optical isolation, 15kV ESD protection, and 600W surge protection for reliable industrial commun..
Interface Type Serial Product Type Serial Protocol Converter Number of Po... 1 Port Connector B DB9
R2,832
Ex Tax:R2,463
1 supplier Reward +R10
Add to Cart
Brand: EXSYS Stock: 17
Connect legacy RS-232 equipment to modern RS-422 or RS-485 networks in industrial automation, building management, or laboratory environments. The EXS..
Interface Type Serial Product Type Serial Protocol Converter Number of Po... 1 Port Connector B Terminal Block
R1,786
Ex Tax:R1,553
1 supplier Reward +R5
Add to Cart
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