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

4 way serial data splitter 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 cables separately (functioned as RS232 splitter: 1 master controls 4 slave).

Serial port combiner splits 1 port in multi hardware COM ports that are used by several applications, so those 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 cables 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.

Serial port hub automatically outputs the values as long as it's wired and powered. DC 5V 1A power adapter provides stable power to transmit and receive data without any delay; supports electrostatic discharge (ESD) protection: ±8kV.

3 Wire RS 232 Connection: TxD, RxD, GND
For IT Administrators to add legacy functionality to notebook, desktop PC and server without COM port
Connect monitors and control industrial/automotive sensors and equipment, barcode scanner, scale, GPS, POS, scanner, receipt printer, satellite receiver, modem, PDA with serial sync
Connect and program LED/Digital signage board ...

Specific
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

What's Included:
1x Serial Splitter Box
1x Power Supply Adaptor
1x Manual