Chapter 3 Front-Panel Operation
RS-232 Interface Configuration
56
RS-232 Interface Configuration
You connect the power supply to the RS-232 interface using the 9-pin (DB-9) serial
connector on the rear panel. The power supply is configured as a DTE (Data Terminal
Equipment) device. For all communications over the RS-232 interface, the power
supply uses two handshake lines: DTR (Data Terminal Ready, on pin 4) and DSR
(Data Set Ready, on pin 6).
The following sections contain information to help you use the power supply over the
RS-232 interface. The programming commands for RS-232 are explained on page 89.
RS-232 Configuration Overview
Configure the RS-232 interface using the parameters shown below. Use the front-
panel key to select the baud rate, parity, and number of data bits (see
page 53 for more information to configure from the front panel).
• Baud Rate: 300, 600, 1200, 2400, 4800, or 9600 baud (factory setting)
• Parity and Data Bits: None / 8 data bits (factory setting)
Even / 7 data bits, or
Odd / 7 data bits
• Number of Start Bits: 1 bit (fixed)
• Number of Stop Bits: 2 bits (fixed)
RS-232 Data Frame Format
A character frame consists of all the transmitted bits that make up a single character.
The frame is defined as the characters from the start bit to the last stop bit, inclusively.
Within the frame, you can select the baud rate, number of data bits, and parity type.
The power supply uses the following frame formats for seven and eight data bits.
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