Connections
Front Panel Connections
The load should be connected to the positive (red) and negative (black) terminals marked
OUTPUT.
Remote sense connections to the load, if required, are made from the positive (+) and
negative (
−
) REMOTE SENSE terminals. Remote sense operation is selected from the keyboard
or via a remote control interface (XDL 35-5P & XDL 56-4P only); the REMOTE SENSE lamp is lit
when remote sense is selected. Switching off remote sense returns the instrument to local
sensing at the output terminals.
The terminal marked
is connected to the chassis and safety earth ground.
Rear Panel Connections
Output Terminals (XDL 35-5P & XDL 56-4P only)
The output and sense terminals are duplicated on the rear panel screw-terminal block marked
, Output
−
, Sense + and Sense
−
; these connections are paralleled with their front panel
equivalents.
Remote sense operation is selected from the keyboard or via a remote control interface. When
the rear panel terminals are used, remote sense should always be selected to ensure that output
regulation is maintained within specification.
RS232 (XDL 35-5P & XDL 56-4P only)
9
−
pin D
−
connector compatible with addressable RS232 use. The pin connections are shown
below:
Pin
Name
Description
1
−
No internal Connection
2
TXD
Transmitted data from instrument
3
RXD
Received data to instrument
4
−
No internal connection
5 GND
Signal
ground
6
−
No internal connection
7
RXD2
Secondary received data
8
TXD2
Secondary transmitted data
9 GND
Signal
ground
Pin 2, 3 and 5 may be used as a conventional RS232 interface with XON/XOFF handshaking.
Pins 7, 8 and 9 are additionally used when the instrument is used in addressable RS232 mode.
Signal grounds are connected to instrument ground. The RS232 address is set from the
keyboard.
GPIB (XDL 35-5P & XDL 56-4P only)
The GPIB interface is not isolated; the GPIB signal grounds are connected to the instrument
ground.
The implemented subsets are:
SH1 AH1 T6 TE0 L4 LE0 SR1 RL1 PP1 DC1 DT1 C0 E2
The GPIB address is set from the keyboard.
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