Rs232/Rs485 Port In Local Mode; Front Panel In Remote Mode; Rear Panel Rs232/Rs485 Connector - TDK-Lambda GEN 8-400 ABCDE User Manual

b) There are two Remote modes:
1. Remote:
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.
2. Local Lockout:
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/RS485 Port in Local 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 7.11) the power supply
will transmit SRQ's while in Local.

7.2.7. Front Panel in Remote Mode

Front panel control in Remote mode is Disabled except for:
PREV: use to preview the Voltage and Current setting.
OVP/UVL: use to preview the OVP/UVL setting.
LOC/REM: use to set the unit into Local mode.
In Local Lockout mode, only the PREV and OVP/UVL pushbuttons are active.
7.3.

Rear Panel RS232/RS485 Connector

The RS232/RS485 interface is accessible through the rear panel RS232/RS485 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.
SG
NC
+
TXD
+
RXD
-
RXD
-
TXD
NC
NC
Tx and Rx are used for RS232 communication. Txd +/- and Rxd +/- are used for
RS485 communication. Refer to RS-232 and RS-485 cabling and connection details.
8 7 6 5 4 3 2 1 8 7 6 5 4 3 2 1
OUT
Fig. 7-1: Rear Panel J3 IN/OUT Connectors Pinout
83503001 Rev G
RX
TX
-
RXD
-
TXD
+
TXD
+
RXD
NC
SG
(connector enclosure)
IN
NOTE
73
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