External Mode Relay Control - Pacific Power Source AFX Series Operation Manual

RS232 Interface and Remote Inhibit Function
On AFX Series models with firmware revision numbers lower than 2.0.13, there is a conflict
between the RS232 interface and the Remote Inhibit function. Both cannot be used at the
same time. To enable the Remote Inhibit input control line, the RS232 interface must be
disabled. This can be done using the browser interface over LAN or USB or from the front
panel. If the Remote Inhibit function is needed, use the USB interface instead of RS232.
To disable RS232 from Web browser, select
SYSTEM Menu -> INTERFACE SETUP and move
the SERIAL CONFIGURATION ENABLE position
to OFF.
To disable RS232 from the front panel, press
the CONFIGURATION key to the left of the LCD, select Interfaces, then select RS232
Interface and set the Status field to Disabled. Refer to section 6.8.5.4 on page 173.
Note: For units with firmware revision 2.0.13 or higher, the RS232 interface is
automatically disabled when enabling Remote Inhibit.
Note: If the Remote Inhibit function is enabled, the RS232 interface is still available but no
hardware handshaking is available. (Xon/Xoff RS232 control only). Alternatively, the
USB interface can be used instead.
Note: Units are shipped default with the Remote Inhibit state Disabled. Thus, no shorting
jumper is needed to operate the power source. Changes to the remote inhibit
configuration are retained after power down (Non-volatile).
Note: Master AFX units installed in cabinet systems shipped with the –OCS (Output
Control Switch) option are configured with the RI function permanently set to
Remote inhibit mode (mode 2). This prevents an operator from accidentally
disabling this switch. The master AFX model number will show an "O" (letter O)
postfix to indicate this configuration.

5.18.8 External MODE Relay Control

The RS232 connector also contains a relay control output pin that may be used in
combination with suitable additional hardware to control a single phase mode shorting relay
between phases A, B and C in cabinet systems.
"A" version models have the remote inhibit function on the Aux I/O DB25 connector
instead.
This mode must be enabled in the SYSTEM screen. This control line (pin 8 and 5 on DB9
connector) puts out +5Vdc when the AFX is in FORM1 (single phase) and -5Vdc when the
AFX is in FORM2 (split) or FORM3 (three phase) mode.
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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
AFX SERIES® OPERATION MANUAL
SECTION 5: UNPACKING AND INSTALLATION
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