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Quality USB Serial Adapters for Windows 7, 8 and Windows 10 USBGear Providing the Best USB Serial Adapters in the Market. Offering FTDI USB Serial Chip sets in many products.

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  1. RS232/422/485 DB9 to Terminal Block 5 Pin Passive Adapter (Micro Sized)

    Regular Price: $20.95

    Special Price $14.95

    DB-9 Female input provides screw type terminal block for TX+, TX-, RX+, RX-, GND very small portable Adapter, the DB9 to terminal micro sized iSerial-TB5 is a passive micro DB9-Female to 5-pin terminal block. Learn More
  2. RS232 Serial to RS422/485 w/2000V DC Optical Isolation and Surge
    $99.99

    Convert RS232 to RS422 or RS485 with this serial converter using the male and female DB9 connector. Mount the converter on flat surfaces or DIN Rail. Learn More
  3. RS232 to RS422/485 Serial Converter with Switching Power Adapter

    Serial RS232 to RS422 and RS485 converter with LED indicator for power and serial signals, full versatility is controlled by a built- in software configuration menu, which is accessed via terminal programs. RS422 with hardware handshake RS485 by ART (automatic receive and transmit). Learn More
  4. RS-232 to TTL Converter 5V output

    The GM-1010-B interface converter converts data (TXD,RXD) of RS-232C to TTL/COMS; the TTL electrical level is 0-5V, without an external power supply.

    • Works with all communication software, plug & play
    • Baudrate: 300bps-115.2Kbps
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  5. RS-232 to RS-485/422 Converter with Surge Protection

    Great for RS232 communication between a PC and a device that needs an RS422 or RS485 protocol. The GM-1042E-B converter is compatible with RS-232C, RS-485/422 standards. It converts RS-232 signals into balanced differential RS-485 or RS-422 signals.

    • Standards: RS-232C, RS-485/422 EIA/TIA
    • Baud rate: 300bps-115.2kbps
    • Transmission distance: 1,200m (RS-485/422); 5m (RS-232)
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  6. RS-232 to RS-232 Mini Port-Powered Isolator

    The GM-1011-B is an RS-232 serial port optoelectronic isolator. It adopts advanced optoelectronic isolation technology, maximally protects RS-232 serial interface devices from bad environment damage, such as ground loop circuit voltage, surge, lightning, ESD, hot-plug and electromagnetic interference, etc.

    • Standards: RS-232 & CCITTV.24 asynchronous protocol
    • Power: from RS-232(TXD, RTS or DTR)
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  7. DB9 RS-232 5 Bits Optoelectronic Isolated Converter 2,500Vrms

    Adopts advanced optoelectronic isolation technology, prevents RS-232 serial interface device damage from a bad environment, such as ground loop circuit voltage, surge, lightning, ESD, hot-plug and electromagnetic interference, etc.

    • Transmission mode: asynchronous, full-duplex, full transparent
    • Isolated voltage: 2,500Vrms impulse or 500VDC
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  8. Industrial RS-232 to RS-485 Converter

    The GM-1004E-B converts RS-232 signals into balanced differential RS-485 signals. The converter is designed to protect the RS-485 port; with integrated TVS’s (TRANSIENT VOLTAGE SUPPRESSOR).

    • Transmission media: twisted-pair or shielded cable
    • Baudrate: 300ps-115.2kbps
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  9. RS-232 to RS-485 Converter with Isolation 2,500Vrms

    The GM-1004E-B converts RS-232 signals into balanced differential RS-485 signals. The converter is designed to protect the RS-485 port; with its advanced TVS’s (TRANSIENT VOLTAGE SUPPRESSOR).

    • Transmission media: twisted-pair or shielded cable
    • Isolation: Isolated voltage 2,500Vrms  500VDC non-stop
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  10. Industrial RS-232 to RS-422 Converter with Terminal Block

    The GM-1005A-B converts RS-232 signals into balanced differential RS-422 signals. The transmission distance of RS-232 communication can be extended to 1.2km.

    • Transmission media: twisted-pair or shielded cable
    • Baud rate: 300bps-115.2kbps
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