Chapter 3 Front-Panel Operation and Features
RS-232 Interface Reference
64
RS-232 Interface Reference
The power supply can be connected 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 101.
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 50
for more information).
• Baud Rate: 300, 600, 1200, 2400, 4800, or 9600 (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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