LMX SERIES® OPERATION MANUAL
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2018 by Pacific Power Source, Inc. (PPS) • All Rights Reserved • No reproduction without written authorization from PPS.
LMX Series Power Source Operation Manual
Page 84 of 463
5.14
Interface Connections
There are several analog and digital interfaces on the LMX power source. This sections
describes their purpose and location on the rear panel of the unit.
5.14.1
USB Device Interface
The USB DEVICE interface (USB Type B connector on the rear panel) provides a virtual COM
port for the PC. Via this port, the unit can be controlled as a normal RS232 interface, e. g.
with a terminal program or user application program. Refer to the section 9, “USB Driver
Installation” for further setup and configuration information.
Refer to the section 9, “USB Driver Installation” for further setup and configuration
information.
5.14.2
GPIB Device Interface
The GPIB interface uses the IEEE488.1 standard 24-pin D-Shell Amphenol micro ribbon
connector. Using a standard GPIB cable, the cable will break out to the left of the unit when
facing the rear. This will typically obstruct USB and LAN interface connector access. Reverse
GPIB cables are available but using these will obstruct the Auxiliary I/O connector.
The GPIB pin assignments are per the IEEE488.1 standard and listed in the table below.
PIN
Signal
Description
Pin 1
DIO1
Data input/output bit.
Pin 2
DIO2
Data input/output bit.
Pin 3
DIO3
Data input/output bit.
Pin 4
DIO4
Data input/output bit.
Pin 5
EOI
End-or-identify.
Pin 6
DAV
Data valid.
Pin 7
NRFD
Not ready for data.
Pin 8
NDAC
Not data accepted.
Pin 9
IFC
Interface clear.
Pin 10
SRQ
Service request.
Pin 11
ATN
Attention.
Pin 12
SHIELD
Pin 13
DIO5
Data input/output bit.
Pin 14
DIO6
Data input/output bit.
Pin 15
DIO7
Data input/output bit.
Pin 16
DIO8
Data input/output bit.
Pin 17
REN
Remote enable.
Pin 18
GND
(wire twisted with DAV)
Pin 19
GND
(wire twisted with NRFD)
Pin 20
GND
(wire twisted with NDAC)
Pin 21
GND
(wire twisted with IFC)
Pin 22
GND
(wire twisted with SRQ)
Pin 23
GND
(wire twisted with ATN)
Pin 24
Logic ground
Table 5-2: GPIB Interface Connector Pin Assignments