American Magnetics 4Q1010PS-430 Integrated Power Supply System - Manual (Page 183)

Rev. 5 165
Appendix
Remote Computer Communication (RS-232)
operates as an electronic load, absorbing and dissipating energy from the
load.
Figure A-3. Four-Quadrant Supply Output Characteristics
A.12 Remote Computer Communication with the Model 430
A.12.1 Communication via RS-232
1. Using serial a null modem cable, connect the DB9 RS-232
connector on the rear of the Model 430 Programmer to a serial
connector on the computer.
1. The BOP power supplies are designed to safely sink only ½ of the
rated power output. Thus the Model 430 is set to limit voltage for
both source and sink to 50%.