---
product_id: 57206074
title: "USB-4COMi-SI-M USB to Quad RS-422/485 Metal case with DIN-Rail"
brand: "serialgear"
price: "6093 DH"
currency: MAD
in_stock: true
url: https://www.desertcart.ma/products/57206074-usb-4comi-si-m-usb-to-quad-rs-422-485
store_origin: MA
region: Morocco
---

# 921.6K bps speed 4x RS-422/485 ports 25KV ESD protection USB-4COMi-SI-M USB to Quad RS-422/485 Metal case with DIN-Rail

**Brand:** serialgear
**Price:** 6093 DH
**Availability:** ✅ In Stock

## Summary

> 🔗 Connect with Confidence!

## Quick Answers

- **What is this?** USB-4COMi-SI-M USB to Quad RS-422/485 Metal case with DIN-Rail by serialgear
- **How much does it cost?** 6093 DH with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ma](https://www.desertcart.ma/products/57206074-usb-4comi-si-m-usb-to-quad-rs-422-485)

## Best For

- serialgear enthusiasts

## Why This Product

- Trusted serialgear brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Durable Design:** Crafted with a sturdy SECC metal chassis and equipped with a DIN rail bracket for easy installation.
- • **Robust Protection:** Enjoy peace of mind with 2000V DC optical isolation and 25KV ESD surge protection.
- • **Seamless Connectivity:** Effortlessly add four RS-422/485 serial ports via USB.
- • **Versatile Compatibility:** Supports a wide range of operating systems including Windows, Linux, and Mac OS.
- • **Lightning-Fast Performance:** Experience high-speed data transfer with baud rates up to 921.6K bps.

## Overview

The USB-4COMi-SI-M is a high-performance USB to Quad RS-422/485 converter that allows you to add four serial ports to your system. With robust protection features and a durable metal chassis, it ensures reliable connectivity across various operating systems.

## Description

The optical isolation on this 4 port serial adapter protects your PC from spikes and surges on the RS-422/485 network, by converting the electrical pulse into an optical signal and then changing it back into an electrical pulse. The surges and spikes cannot cross the optical link.The adapter is built-in surge protector to withstand electrostatic discharge and power surges up to 25KV ESD. The USB-to-Optical isolated Quad RS-422/485 Adapter provides instant connectivity to RS-422 or RS-485 communication devices for POS, factory automation equipment, multi-drop data collection devices, bar code readers, time clocks, scales, data entry terminals, PC to PC long distance communications, ATMs and serial data communication in harsh environments.Features:Adds four RS-422, or RS-485 serial ports by connecting to USB portInstalled as standard Windows COM port2000V DC optical isolation protection25KV ESD surge protectionRS-422 data signal: Tx-, Tx+, Rx+, Rx-, GND, RTS-, RTS+, CTS+, CTS-RS-485 data signal: 4-wire: Tx-, Tx+, Rx+, Rx- 2-wire: data-, data+FIFO: 128 byte transmit buffer 384 byte receive bufferSerial port speed up to 920K bpsFour DB9 male connectorsFull hardware and software flow controlAutomatic transmit buffer control for 2-wire RS485 half-duplex operation2KV DC optical isolation protectionESD surge protection (25KV)Monitor LEDs of Power, TxD, RxD indicating power & port status

## Features

- Adds four RS-422 or RS-485 serial ports by connecting to a USB port
- 2000V DC optical isolation. 25KV ESD surge protection.
- SECC metal chassis with DIN rail bracket
- High speed serial port with the baud rate up to 921.6K bps
- OS Support: Windows 7, Windows 8, and Windows 10 Linux and Mac OS 10.X

## Images

![USB-4COMi-SI-M USB to Quad RS-422/485 Metal case with DIN-Rail - Image 1](https://m.media-amazon.com/images/I/41DJBpzR5IS.jpg)
![USB-4COMi-SI-M USB to Quad RS-422/485 Metal case with DIN-Rail - Image 2](https://m.media-amazon.com/images/I/51sNo6pUNJL.jpg)
![USB-4COMi-SI-M USB to Quad RS-422/485 Metal case with DIN-Rail - Image 3](https://m.media-amazon.com/images/I/41WKfkaEKCS.jpg)
![USB-4COMi-SI-M USB to Quad RS-422/485 Metal case with DIN-Rail - Image 4](https://m.media-amazon.com/images/I/41cwj5eviTL.jpg)
![USB-4COMi-SI-M USB to Quad RS-422/485 Metal case with DIN-Rail - Image 5](https://m.media-amazon.com/images/I/51WvtG93chS.jpg)

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**Shop now:** [https://www.desertcart.ma/products/57206074-usb-4comi-si-m-usb-to-quad-rs-422-485](https://www.desertcart.ma/products/57206074-usb-4comi-si-m-usb-to-quad-rs-422-485)

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*Product available on Desertcart Morocco*
*Store origin: MA*
*Last updated: 2026-02-14*