Instructions

2. There are two Remote modes:

1. Remote:

2. Local Lockout:

In this mode, return to local can be made by the front panel REM/LOC or via

serial port command RMT 0. Set the unit into Remote mode via serial port

RMT 1 command.

In this mode the unit can be returned to Remote mode via the serial port

RMT 1 command or by turning off the AC power until the display turns off

and then turn it to on again. In Local Lockout mode, the front panel

REM/LOC button is not active. Set the unit into Local Lockout mode via

serial port RMT 2 command.

7.2.6 RS232/485 port in Local mode

7.2.7 Front panel in Remote mode

When the power supply is in local mode, it can receive queries or commands. If a query is received,

the power supply will reply and remain in Local mode. If a command that affects the output is

received, the power supply will perform the command and change to Remote mode.

Serial commands may be sent to set the status registers and read them while the unit is in Local

mode. If the Enable registers are set (refer to section 7.8) the power supply will transmit SRQ’s while

in Local.

Front panel control in Remote mode is disabled except for:

1. PREV: use to preview the Voltage and Current limit setting.

2. OVP/UVL: use to preview the OVP/UVL setting.

3. LOC/REM: use to set the unit into Local mode.

In Local Lockout mode, only PREV and OVP/UVL are active.

The RS232/485 interface is accessible through the rear panel RS232/485 IN and RS485 OUT

connectors. The connectors are 8 contact RJ-45. The IN and OUT connectors are used to connect

power supplies in a RS232 or RS485 chain to a controller. Refer to Fig.7-1 for IN/OUT connectors

7.3 REAR PANEL RS232/485 CONNECTOR

Tx and Rx are used for RS232 communication. Txd +/- and Rxd +/- are used for RS485

communication. Refer to RS232 and RS485 cables description for connection details.

NOTE

TXD

RXD

TXD

RXD

TXD

RXD

TXD

OUT

Fig.7-1: J3 rear panel IN/OUT connectors pinout

8 7 6 5 4 3 2 1

Shield

(connector enclosure)