CHAPTER 5
APPLICATIONS
Entire Contents Copyright
2004 by Adaptive Power Systems, Inc. (APSI) • All Rights Reserved • No reproduction without written authorization from APSI.
APS-1000 Series
5 - 2
OM-001-01000-000-04.0
PLC External Interface
All APS Power Converters have a built-in PLC External Interface. Consequently, all
APS Power Converters can be operated remotely. The PLC external interface is
particularly useful for tests that require the use of independent metering and external
data acquisition instrumentation. The PLC external interface allows remotely located
contact closures to start / stop one of three sets of pre-programmed test parameters. The
test parameters are entered in memory sets M1, M2, and M3.
Operation of the PLC remote interface does not require a true PLC, as simple switch
closures are effective at starting and stopping an APS-1000 stored test program.
However, although simple switches can be used, they require manual operation. The
use of a PLC permits external automatic control of the test programs in memories M1,
M2, or M3.
In preparation for external control, connect an external switch / controller. The
controller is attached using the PLC External Interface D-Sub DE-9 connector located
on the rear panel of your APS-1000 Power Converter (see page 3-8).
To activate the APS PLC internal circuitry, set the system parameter PLC to ON.
NOTE: Do not attempt to use the PLC D-Sub DE-9 connector as an RS-232 or GPIB
data port.
When the PLC system parameter is set to ON in the Systems parameters, the OUTPUT
button on the front panel is disabled. If the OUTPUT button is pressed, PLC ON will
be displayed on the panel, an alarm will sound, and the system will return to its previous
status. If the system encounters an error, the front panel RESET button or the ON/OFF
control at the PLC remote can be enabled to perform a system reset.
A sketch of the APS PLC DE-9 pinouts and simple switch configuration is shown on
the following page.