76
83532002 Rev H
8.2.5. Setting the Unit into Remote or Local Mode
The unit will be put into Remote mode only via serial communication command.
Commands that will put the unit into Remote mode are:
RST
PV n
RMT n
OUT n
PC n
(for values of “n”, see Tables 7-4, 7-5 and 7-6)
There are two Remote modes:
a)
Remote:
In this mode, return to Local can be made by the front panel REM/LOC
button or via serial port command “RMT 0”. Set the unit into Remote mode via the
serial port “RMT 1” command.
b)
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 Input power (until the Front Panel
display turns off) and then recycling AC Input power. In local Lockout mode, the front
panel REM/LOC button is not active. Set the unit into Local Lockout mode via the
serial port “RMT 2” command.
8.2.6. RS-232/RS-485 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.
8.2.7. Front Panel in Remote Mode
Front panel control in Remote mode is disabled except for:
1. PREV: use to preview the Output voltage and Output current limit setting.
2. OVP/UVL: use to preview the OVP/UVL settings.
3. LOC/REM: use to set the unit into Local mode.
In Local Lockout mode, only the PREV and OVP/UVL Front Panel functions are active.
8.3. Rear Panel RS-232/RS-485 Connector
The RS-232/RS-485 interface is accessible through the rear panel RS-232/RS-485 IN and
RS-485 OUT connectors (8-contact RJ-45). The IN and OUT connectors are used to connect
power supplies in a RS-232 or RS-485 daisy-chain to a controller. Refer to Fig. 8-1 for the
IN/OUT connectors.
NC
NC
RX
NC
NC
TXD
RXD
TXD
RXD
RXD
TXD
RXD
TXD
SG
SG
-
-
-
-
+
+
+
+
TX
OUT
IN
8 7 6 5 4 3 2 1
8 7 6 5 4 3 2 1
Shield
(connector enclosure)
Fig 8-1: Rear panel J3 IN/OUT connectors pinout
Tx and Rx are used for RS-232 communication. Txd +/- and Rxd +/- are used for RS-485
communication. Refer to the RS-232 and RS-485 cable descriptions for connection details.
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