RS232 Splitter, DTECH 4 Port Serial Expansion Box 1x4 COM Port Expander with Power Adapter for Sharing PCs and Capture Data

4 way serial port divider is a cost effective solution when you need to manage and control multiple DB9 RS232 devices (monitor, printer, modem, scales, scanner) via computer.

Connection 1: Monitor and Control Multiple Terminal Device via 1 PC

1 PC connected to input port, and 4 devices to output ports via Straight Through serial cable separately (functioned as RS232 divider: 1 master controls 4 slave).


Serial port combiner splits 1 port in multi hardware COM ports that are used by several applications, so the applications can receive the same data from PC at once (duplicator).


Connection 2: Capture Data from 1 Terminal Device on Redundant PCs

4 PCs connected to output port, 1 data acquisition equipment to input port via Null Modem serial cable separately. (functioned as RS-232 switch: 4 masters control 1 slave)


Several PCs receive data from 1 device, sharing multiple PCs on a single peripheral; only 1 terminal device can send data to a laptop at a time.


RS232 hub splitter auto-outputs the values as long as its wired and powered. DC 5V 1A power adapter provides stable power to transmit and receive data without any delay; ±8kV ESD electrostatic discharge protection:


3 Wire RS 232 Connection: TxD, RxD, GND

For IT Administrators to add legacy functionality to notebook, desktop PC, modem and server without COM port

Monitor and control industrial / automotive sensors equipment, barcode scanner, scale, radio, personal weather station, GPS, POS, scanner, receipt printer, satellite receiver, modem, PDA with serial sync
Serial adapter hub connect and program LED Digital signage board ...


Master bus: 1x DB9 female (pin2-TxD, pin3-RxD, pin5-GND)

Slave bus: 4 x DB9 male (2-RxD, 3-TxD, 5-GND)

Input/Output Level: RS232-C

Cascade: Yes


Whats Included:

1x External Serial Splitter Box

1x Power Supply Adaptor

1x Manual

Product information