Copyright  2017 by i-Logic Software support@i-logic.com

USB to Serial Converters

Since newer computers don't have serial ports it is necessary to use a Serial port converter that plugs into a USB port on your PC. Most USB to Serial converters will automatically download the drivers for it from Windows Update when first plugged in. The more unknown brands may not.  
USB Converter
Serial
Information about drivers for Prolific chip:  
 Latest PL2303 Prolific DriverInstaller     2016/10/7   v1.16.0   4019KB   Older Drivers:               PL2303_Prolific_DriverInstaller_v1.8.19.zip    2012/10/11   v1.8.19   4000 KB   PL2303_Prolific_DriverInstaller_v170.zip    2012/8/1   v1.7.0   3800 KB   PL2303_Prolific_DriverInstaller_v10518.zip    2009/7/17   v1.5.18   3201 KB  
(For PL2303 HXA, XA, HXD, EA, RA, SA, TA, TB versions) Installer version & Build date: 1.10.0 (2014-09-25) Windows XP (32 & 64-bit) WDM WHQL Driver: v2.1.51.238 (10/22/2013) - Compatible with Windows 2000SP4 & Server2003 Windows Vista/7/8/8.1 (32 & 64-bit) WDF WHQL Driver: v3.4.67.325 (08/15/2014) - Windows Vista, 7, 8, 8.1, Server 2008R2, Server 2012, Server 2012R2 Certified WHQL Driver - Driver can auto-download via Windows Update (for Windows 7/8/8.1/Server2008R2/2012/2012R2)
Prolific recommends to purchase from following Cable Makers: ATEN UC232A USB to Serial    (Recommended). Drivers: for XP,Vista,Win7,8,10  2000,98,ME
Note on Windows 8-10: Windows 8-10 is NOT supported for older versions of prolific chips. So if your USB to Serial converter worked in Windows 7 and doesn't work in Windows 8, it is probably because you have an older or no-name brand converter that does not have the latest version of chip in it. And new drivers wont help it. In Windows 8 Device Manager the yellow warning symbol will show for converters that used to work in Windows 7 but are too old to work now: In Windows 8 a newer name brand converter will work fine: The DNC Server software itself works fine on Windows 8. Recommended to use ATEN UC232A USB to Serial This is the Gold Standard of USB to Serial adapters.    
We don't sell any serial port hardware, but we have bought converters on ebay and used them. These models that are sold by many sellers on Ebay. This 4-port USB-Serial converter works good on Win98 to Windows 8-10. Are available from many places on Ebay: Uses MosChip MCS7840 driver available here: http://i-logic.com/ftp/drivers/MCS7840(USB TO 4S).zip
Don't use these Belkin F5U409 USB to Serial converters. These don't work for CNC communication. Stay away from these cheap blue things. They don't work.
Many brands use FTDI chips. Drivers available here: http://www.ftdichip.com/FTDrivers.htm

USB to Serial Converters

Since newer computers don't have serial ports it is necessary to use a Serial port converter that plugs into a USB port on your PC. Most USB to Serial converters will automatically download the drivers for it from Windows Update when first plugged in. The more unknown brands may not.  
USB Converter
Serial
Copyright  2017 by i-Logic Software support@i-logic.com
Note on Windows 8-10: Windows 8-10 is NOT supported for older versions of prolific chips. So if your USB to Serial converter worked in Windows 7 and doesn't work in Windows 8, it is probably because you have an older or no-name brand converter that does not have the latest version of chip in it. And new drivers wont help it. In Windows 8 Device Manager the yellow warning symbol will show for converters that used to work in Windows 7 but are too old to work now: In Windows 8 a newer name brand converter will work fine: The DNC Server software itself works fine on Windows 8. Recommended to use ATEN UC232A USB to Serial  This is the Gold Standard of USB to Serial adapters.    
Prolific recommends to purchase from following Cable Makers: ATEN UC232A USB to Serial    (Recommended). Drivers: for XP,Vista,Win7,8,10  2000,98,ME
(For PL2303 HXA, XA, HXD, EA, RA, SA, TA, TB versions) Installer version & Build date: 1.10.0 (2014-09-25) Windows XP (32 & 64-bit) WDM WHQL Driver: v2.1.51.238 (10/22/2013) - Compatible with Windows 2000SP4 & Server2003 Windows Vista/7/8/8.1 (32 & 64-bit) WDF WHQL Driver: v3.4.67.325 (08/15/2014) - Windows Vista, 7, 8, 8.1, Server 2008R2, Server 2012, Server 2012R2 Certified WHQL Driver - Driver can auto-download via Windows Update (for Windows 7/8/8.1/Server2008R2/2012/2012R2)
 Latest PL2303 Prolific DriverInstaller     2016/10/7   v1.16.0   4019KB   Older Drivers:               PL2303_Prolific_DriverInstaller_v1.8.19.zip    2012/10/11   v1.8.19   4000 KB   PL2303_Prolific_DriverInstaller_v170.zip    2012/8/1   v1.7.0   3800 KB   PL2303_Prolific_DriverInstaller_v10518.zip    2009/7/17   v1.5.18   3201 KB  
Information about drivers for Prolific chip:  
We don't sell any serial port hardware, but we have bought converters on ebay and used them. These models that are sold by many sellers on Ebay. This 4-port USB-Serial converter works good on Win98 to Windows 8-10. Are available from many places on Ebay: Uses MosChip MCS7840 driver available here: http://i-logic.com/ftp/drivers/MCS7840(USB TO 4S).zip
Many brands use FTDI chips. Drivers available here: http://www.ftdichip.com/FTDrivers.htm
Don't use these Belkin F5U409 USB to Serial converters. These don't work for CNC communication. Stay away from these cheap blue things. They don't work.