User`s guide

382280-EU-EN v1.9 07/13

RS-232 PC Communications Interface

RS-232 data format

Baud rate 9600

Parity none

Data bits 8

Stop bits 1

Flow control none

RS-232 Connection

Connect the supplied communications cable to the rear of the power

supply and to the communications port of the PC.

Power Supply PC

Pin 2 ------------------------------ Pin 2 RX

Pin 3 ------------------------------ Pin 3 TX

Pin 4 ------------------------------ Pin 4 DTR

Pin 5 ------------------------------ Pin 5 GND

RS-232 Commands

The command format is as follows: Command

Parameter <Carriage Return (cr)>

For example: V 20.5 (sets output to 20.5VDC)

An ASCII code for <Carriage Return> must be sent together with the command or commands.

Commands will not be processed until a <Carriage Return> is received. Note that the unit can

process up to 50 characters. If more than 50 characters are received, the unit will clear the entire

command buffer.

Summary of Commands

STBY <cr> (place the unit in standby mode)

OPER <cr> (place the unit in operating mode)

V xx.xxx <cr> (set the voltage output)

A x.xxx <cr> (set the current output)

SEC xxx.xx <cr> (enter time in seconds)

OVP xx.xxx <cr> (enter desired voltage value for over-voltage protection)

OCP 0 <cr> (disable the over-current protection)

OCP 1 <cr> (enable the over-current protection)

STORE xxx <cr> (store the present output values to memory location xxx)

RECALL xxx <cr> (recall an output setup from memory location xxx)

STEP <cr> (enable the ATS Auto Test Sequencing function)

? <cr> (retrieve all data)

V? <cr> (retrieve the voltage value)

A? <cr> (retrieve the current value)

OCP? <cr> (retrieve the status of OCP)

OVP? <cr> (retrieve the voltage value for OVP)

SEC? <cr> (retrieve the time value in seconds)

STATUS? <cr> (retrieve the STBY/OPER, OCP, OVP, & 5V/3.3V fixed output status)

Note: All commands are case insensitive.