HF-2500A HIGH FREQUENCY WELD CONTROL
990-371 E-1
APPENDIX E
Communications
Overview
The Power Supply has the ability to communicate with a host computer or with an automation control
system. The communications option uses either RS-232 to connect one Power Supply to one host, or RS-
485 multi-drop architecture to connect up to 30 Power Supplies to one host on a single channel.
Remote Programming
The codes needed to perform remote programming are listed in Section II. Communications Protocol and
Commands. Using these codes, users can write customized software for controlling all functions of the
welding power supply and interfacing the unit to automation control systems.
RS-485 Connectors
The unit has two DB-9 (female) connectors wired as follows:
A terminating resistor assembly is supplied with the unit. If only one unit is connected to the host, the
terminating resistor assembly must be installed in that unit. If multiple units are connected to the host,
only one unit (the unit furthest from the host) must have the terminating resistor assembly installed.
#1 – Not Used
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