Interface Connections; Usb Device Interface; Gpib Device Interface; Table 5-2: Gpib Interface Connector Pin Assignments - Pacific Power Source LMX Series Operation Manual

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
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Pin 6
Pin 7
Pin 8
Pin 9
Pin 10
Pin 11
Pin 12
Pin 13
Pin 14
Pin 15
Pin 16
Pin 17
Pin 18
Pin 19
Pin 20
Pin 21
Pin 22
Pin 23
Pin 24

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LMX Series Power Source Operation Manual
Signal
DIO1 Data input/output bit.
DIO2 Data input/output bit.
DIO3 Data input/output bit.
DIO4 Data input/output bit.
EOI End-or-identify.
DAV Data valid.
NRFD Not ready for data.
NDAC Not data accepted.
IFC Interface clear.
SRQ Service request.
ATN Attention.
SHIELD
DIO5 Data input/output bit.
DIO6 Data input/output bit.
DIO7 Data input/output bit.
DIO8 Data input/output bit.
REN Remote enable.
GND (wire twisted with DAV)
GND (wire twisted with NRFD)
GND (wire twisted with NDAC)
GND (wire twisted with IFC)
GND (wire twisted with SRQ)
GND (wire twisted with ATN)
Logic ground

Table 5-2: GPIB Interface Connector Pin Assignments

LMX SERIES® OPERATION MANUAL
Unpacking and Installation
SECTION 5:
Description
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