KEPCO EL Series Electronic Load Operator Manual P/N 243-1295 Firmware Version 3.22 through 3.41 - Manual (Page 31)

SERIES EL 062011
2-13
2.6.4 ANALOG PROGRAMMING CONNECTIONS
The ANALOG PGM input BNC connector is used for remote analog programming of the load.
Applying 0 to10V adjusts the controlled parameter (depending on mode selection) from 0 to full
scale. See PAR. 3.15 for details. For Master/Slave configurations, the remote analog signal
must be applied to all parallel-connected units.
2.6.5 CURRENT MONITOR CONNECTIONS
An output signal at the ILOAD BNC connector (see Figure 2-3 or 2-4) is 0 to 10V corresponding
to 0 to full scale of the load’s rated current. Connect voltmeter from shell to center pin when the
load is drawing current from the UUT. For Master/Slave configurations, each ILOAD output
reflects the current flowing in that individual load.
2.7 DIGITAL CONNECTIONS
The following paragraphs describe the connections required to use the RS 232 or USB ports for
remote control of the unit.
If control via the computer interface is desired, the computer should be connected to the load via
either the USB 2.0 type B connector or the RS-232 interface connector located at the rear panel.
For G option units (optional GPIB interface is installed), connect the EL Load GPIB connector at
the rear panel to the GPIB bus using a standard GPIB cable (not supplied). NOTE: GPIB drivers
are not available.
The currently active interface takes precedence. That is, with no other direction, the Series EL
communicates with the computer via the USB or RS-232 interface. The selection of the interface
depends on the last interface used.
For simple communications a terminal emulator program such as HyperTerminal provides the
necessary interface. No drivers are required when using the RS-232 interface, however If USB
communications are used, a special driver must be installed (the USB interface is not plug and
play). Refer to the Kepco website to download the Series EL USB Driver Installation Manual that
describes how to download and install the driver, as well as how to establish communications
between the Series EL load and the computer using a terminal emulator:
www.kepcopower.com/support/opmanls.com#e
NOTE: If using USB and HyperTerminal, it is advisable to first turn on the Series EL load and
then launch HyperTerminal as HyperTerminal may become dysfunctional (hung up) if
power is removed from the USB connection before HyperTerminal is closed or before
the connection is closed.
When communicating with the Series EL via a computer interface, the Series EL responds to
IEEE 488.2 and SCPI (Standard Commands for Programmable Instruments) commands and
queries. Compatible IEEE 488.2 commands and queries are listed in Appendix A. The complete
list of SCPI commands for designed for the Series EL Electronic Load are listed in Appendix B.