Two RS232/4xx/20mA ports (port type can be mixed but must be specified
Overview of the KD485
The KD485 is a multi-purpose isolated RS232/422/485/20mA interface converter with intelligent data processing options.
Three standard product versions cover most industrial interface and protocol conversion applications.
Another common requirement is multi-drop connection of non-addressable RS232/422/20mA devices, to enable them to be conveniently polled from a single RS422/485 Master device. The KD485-ADE can act as an "addressable adapter" for each RS232 device.
Many projects involve the interconnection of equipment which is mutually incompatible. The KD485-PROG can be programmed - in ANSI C - to convert virtually any industrial automation protocol into any other. A MODBUS RTU comms library is available for rapid MODBUS RTU SLAVE protocol converter development, enabling a non-MODBUS device to appear as a MODBUS RTU SLAVE device.
The KD485 is available in three stock versions which share the following common features:
This entry level product has no CPU. It is an interface converter/isolator only and is baud rate and character format independent. Its main application is in isolated conversion between RS232, RS422 and 20mA. It can also drive a 2-wire RS485 bus if the RS232 host provides RTS Control
As for the KD485-STD but inserts a CPU (with two serial ports) into the data path. Several standard application programs ("Modes") are provided in a built-in ROM:
The KD485-ADE can be configured with any "dumb" terminal, a PC or a hand-held terminal such as a Psion Organiser. A PC-based configuration program, KDCFG.EXE, for Windows 3.x and win9x/NT/2000/XP is included on a diskette - click here for an example config screen.
This fully programmable version has all the KD485-ADE features, plus a large EEPROM and a means of uploading user-written programs in to it. Programs can be written in ANSI C, assembler and other languages, and are uploaded to the KD485-PROG with supplied software (DOS or Windows).