83-517-000 Rev.
A
59
2. There are two Remote modes:
1.
Remote
:
In this mode, return to
Local
mode can be made by the front panel
REM/LOC
button or via serial port command
RMT 0
. Set the unit into
Remote
mode via serial
port command
RMT 1
.
2.
Local Lockout
:
In this mode the unit can be returned to
Remote
mode via the serial port command
RMT 1
or by recycling the AC Input power. In
Local Lockout
mode, the front panel
REM/LOC
button is not active. Set the unit into
Local Lockout
mode via serial port
command
RMT 2
.
RS-232/RS-485 Port in Local Mode
7.2.6
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 switch 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 (re
fer to Section 7.8) the power supply will transmit SRQ’s while in
Local
mode.
Front Panel in Remote Mode
7.2.7
Front panel control in
Remote
mode is disabled except for:
-
PREView
: use to preview the Output voltage and Output current settings.
-
OVP/UVL
: use to preview the power supply OVP/UVL settings.
-
LOC/REM: use to set the unit into
Local
mode.
In
Local Lockout
mode, only the
PREView
and
OVP/UVL
pushbuttons are active.
7.3
REAR PANEL RS-232/RS-485 CONNECTOR
The RS-232/RS-485 interface is accessible through the rear panel RS-2332/RS-485
IN
and RS-485
OUT
connectors. The connectors are 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 Figure 7-1 for the
IN/OUT
connectors.
Figure 7-1: Rear Panel J3 IN/OUT Connectors Pinout
NOTE
Tx and Rx are used for R-S232 communication. Txd +/- and Rxd +/- are used for
RS-485 communication. Refer to RS-232 and RS-485 cables description for
connection details.
NC
NC
RX
NC
NC
TXD
RXD
TXD
RXD
RXD
TXD
RXD
TXD
SG
SG
-
-
-
-
+
+
+
+
TX
OUT
IN
Fig.7-1: Rear panel J3 IN/OUT connectors pinout
8 7 6 5 4 3 2 1 8 7 6 5 4 3 2 1
Shield
(connector enclosure)