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Industrial USB to 4-Port RS232 Converter (3KV isolation/6KV lightning protection)

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Type : USB to RS232 Converter
Description :

The basic function of this model FC-2008 is a conversion from USB to 4 channel 3KV isolation /6KV lightning protection RS232.


The basic function of this model FC-2008 is a conversion from USB to 4 channel 3KV isolation /6KV lightning protection RS232. The working power supply of this product is supplied by a USB port without an external power supply. It adopts unique non-delay automatic transceiver conversion technology, plug and play suitable for all software, and has transceiver enable control. When no data is sent, the output is in a high resistance state and supports multi-point communication.


Unlike other similar cheap products on the market, this product:

Industrial-grade operating temperature (-40 to +85 degrees),

Serial port 3KV isolation (access AC~380V non-burning USB port)/6KV three-level lightning protection (10/700us current wave, internal resistance 40Ω)

USB built-in TVS protection (±15kV-air and ±8kV-contact),


Full-speed USB device interface, compatible with USB v2.0.

Emulate a standard serial port, used to upgrade the original serial port peripherals, or add an additional serial port through USB.

The serial port application program under the Windows operating system on the computer side is fully compatible and does not need to be modified.

The hardware has a built-in transceiver buffer, each serial port has its own isolation chip, and supports communication baud rates of 1200bps to 256kbps

4 Channel RS232 serial port and USB interface with 3KV isolation, when connected to AC~220V or AC~380V high voltage for a long time, only the RS232 interface will be burned, and the USB port and connected equipment will not be burned.

Applicable operating system: Win98/2K/XP, WIN10/WIN11 system 32/64 bit.

5 LED indicator lights: power light, 4Channel serial port data sending and receiving two-color lights, convenient for monitoring status.

TYPE B USB port, power supply USB power supply, working current <30mA, USB interface protection: electrostatic protection can reach ±15kV (air) and ±8kV (contact), EFT protection can reach 40A (5/50ns), lightning protection can Up to 5A (8/20us).

RS232 interface has three levels of lightning protection, radar protection to GB/T17626.5 (IEC61000-4-5) short circuit current wave 10/700μs open circuit peak output voltage 6KV, internal resistance 40Ω standard;

Wide temperature type: working temperature -40℃~ +85℃.


● Serial Interface


EIA/TIA-232 RS-232 (ITU-T V.28)

Serial interface:

RS-232: 3-wires

RS-232: TxD, RxD, GND


USB2.0 Interface


Standard: USB2.0

Full speed: Full-speed (500Kbps~12Mbps)

Physical interface: USB TYPE B female


Working Environment

Working temperature: -40°C – +85°C

Storage temperature: -40°C – +85°C

Working humidity: 0% – 95% (no condensation)

MTBF: >100,000 hours


Product Model


Function Description

Lightning-proof isolated USB to 4-channel RS232 converter

Port Description

1*USB2.0 port; 4* RS232 port

Power Supply

Passive, USB-powered, power consumption <1W

Product Size

Dimensions: 97mm(L) x 54mm(W) x 32mm(H)

Installation method: 35mm rail mounting, wall-mounted




application of usb to rs232


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