Remote/Local Operation; Rs232 Interface Connector - Metek Sorensen XEL serie Manual De Operación

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Remote/Local Operation

At power-on the instrument will be in the local state with the REMOTE indicator off. In this state all
front panel operations are possible. When the instrument is addressed to listen and a command is
received the remote state will be entered and REMOTE will be turned on. In this state the front
panel is locked out and remote commands only will be processed. The V/I settings, Meter Average
setting, Current Range and output state(s) are unchanged but LOCK and V-Span are cancelled if
they were on. The Vmin and Vmax values are retained. The instrument may be returned to the local
state by pressing the LOCAL key; however, the effect of this action will only remain until the
instrument is addressed again or receives another character from the interface, when the remote
state will once again be entered. Returning to Local by this action, or by the use of the LOCAL
command, will keep the V/I settings at their last remotely set values, with Lock Settings on, and will
leave the output in its present state.
RS232 Interface

RS232 Interface Connector

The 9-way D-type serial interface connector is located on the instrument rear panel. The pin
connections are as shown below:
Pin
1
2
3
4
5
6
7
8
9
RS232 Connections
The RS232 interface should be connected to a standard PC port using a fully wired 1:1 male-female
cable without any cross-over connections. Alternatively, only pins 2, 3 and 5 need be connected to
the PC, but with links made in the connector at the PC end between pins 1, 4 and 6 and between
pins 7 and 8, see diagram.
Name
Description
RI
Passively asserted (+V through 10kΩ)
TXD
Transmitted data from instrument
RXD
Received data to instrument
CTS
GND
Signal ground
RTS
Passively asserted (+V through 10kΩ)
DSR
No internal connection
DTR
CD
No internal connection
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Sorensen xel 120Sorensen xel 250

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