8 way serial data splitter is a cost effective solution when you need to manage and control multiple DB9 RS232 devices via computer. Connection 1: Monitor and Control Multiple Terminal Device via 1 PC 1 PC connected to input port, and 8 devices to output ports via Straight Through serial cables separately (functioned as RS232 splitter: 1 master to control 8 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 8 PCs connected to output port, and 1 data acquisition equipment to input port via Null Modem serial cables separately. (functioned as RS-232 switch: 8 master to control 1 slave) Several PCs to receive data from 1 device, allowing you to share multiple PCs on a single peripheral; only 1 terminal device can send data to a laptop at a time. Easy and Simple No need of driver, plug and play; serial port hub will automatically output the values as long as it?s wired and powered. DC 5V 1A power adapter help you to get stable power to transmit and receive data without any delay. 3 Wire RS 232 Connection for IT Administrators to add legacy functionality to notebook, desktop PC and server without COM port Connect monitor 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 and Digital signage board ... Specific Master bus: 1x DB9 female (pin2- TxD, pin3- RxD, pin5- GND) Slave bus: 8 x DB9 male (pin2 -RxD, pin3 - TxD, pin5 -GND ) Input/Output Level: RS232-C Cascade: Yes What?s Included: 1x Serial Splitter Box 1x Power Supply Adaptor 1x Manual