The following are free of charge. All are Copyright KK Systems Ltd unless otherwise specified.

All Products Software Utilities diskette (41MB)
This is the complete diskette as sent out with all KK Systems products from January 2014. It contains all data sheets, manuals, and drivers.
KD485-ADE/KD485-PROG Software Utilities diskette (868k)
This is the complete diskette as sent out with the KD485-ADE or KD485-PROG. Includes the Windows 95/98/NT4/2000/XP win32 configuration program (KDCFG.EXE v2.03 updated 3/2008), and DOS configuration utilities.
KD485-ADE/KD485-PROG Win32 Configuration Utility v2.5 (297k)
This is a win32 (Windows NT4/2000/XP/Vista/win7) version of the above KDCFG.EXE configuration program. The main change is that COM ports above COM4 can be selected.
KD485-ADE/KD485-PROG Win16 Configuration Utility v1.3 (334k)
This is a win16 (Windows 3.1/WFWG 3.11) version of the above KDCFG.EXE configuration program. It also runs under NT4.
KD485-PROG MODBUS Library User Manual (133k)
This is the user manual for the KD485-PROG MODBUS RTU SLAVE LIBRARY. It shows how the library is used to create MODBUS-to-custom protocol converters.
KD485-PROG Bisync-Modbus Converter (28k)
This is the source code for a protocol converter, based on the KD485-PROG MODBUS LIBRARY, which can be used to make almost any Eurotherm Bisync product look like a MODBUS RTU SLAVE.
KDMON System Monitor CD (25MB)
This is a win32 (Windows NT4/2000/XP/Vista/win7) configuration program CD for the KDMON.
KD420 Modbus Sensor Interface CD (25MB)
This is a win32 (Windows NT4/2000/XP/Vista/win7) configuration program CD for the KD420.
PPC Software Utilities diskette (174k)
This is the complete diskette as sent out with the PPC or
PPC-E Protocol Converter. Includes the KTERM DOS/Windows configuration program, and many example files.
USB232 Windows Drivers (2000k)
These are the latest drivers (from Prolific Technology) for the USB232 USB-RS232 converter, for Windows 98, Windows 2000, Windows XP, IMAC, Linux.
For Vista and Win7 drivers please visit http://tech.prolific.com.tw (direct link) and download the PL2303 Driver Installer. A copy of the latest (2012) installer is here.
USB485 Windows Drivers CD (26MB)
These are the Microsoft certified drivers (from FTDI) for the USB485 USB-RS422/485 converter, for Windows 98, Windows 2000, Windows XP, Vista and Windows 7.
Alternatively, the latest drivers for everything that's supported can be found at the FTDI website (FT232B chip, VCP driver).
USB232 Application Note #1 (100k)
This Application Note contains information on how to control the COM port number which the USB232 driver creates, in cases where a PC used to contain hardware COM ports which are still known to the operating system but which are no longer physically present.