AFX SERIES® OPERATION MANUAL
SECTION 5: UNPACKING AND INSTALLATION
Entire Contents Copyright
2018 by Pacific Power Source, Inc. (PPS)
• All Rights Reserved • No reproduction without written authorization from PPS.
AFX Series Power Source Operation Manual
Page 80 of 402
5.17.5
RS232 Serial Interface - “L” Versions only
A DB9 serial interface connector is located on the rear panel for “L” version models of the
AFX Series. “A” version models has the serial interface integrated in the Aux I/O DB25
connector instead.
The DB9 connector is also used for the Remote Inhibit input (pins 7 and 9) and Mode Relay
control output (pins 8 and 5) functions. These functions can be used while using the serial
interface at the same time if needed but a special cable will be required to do so.
PIN
Abbreviation
Description
Pin 1
N/C
Not connected
Pin 2
TXD
Transmit Data
Pin 3
RXD
Receive Data
Pin 4
DTR
Data Terminal Ready
Pin 5
COM
Common
Pin 7
RTS
Input – Remote Inhibit
Pin 8
CTS
Output – Mode Relay Control
Pin 9
N/C
+5Vdc internal pull-up for Remote Inhibit
Table 5-5: Standard RS232 DB9 Pin Assignments
If only the RS232 interface function is used, a regular straight through DB9 to DB9 cable can
be used to connect to a PC serial port.
5.17.6
GPIB Device Interface (Option G)
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.