KEPCO EL Series Electronic Load Operator Manual P/N 243-1295 Firmware Version 3.63 through 3.86 - Manual (Page 31)

SERIES EL 070312
2-13
eter (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
The signal at the ANALOG CONTROL - ILOAD BNC connector (see Figure 2-3) is an output
signal (ILOAD), 0 to 10V corresponding to 0 to full scale of the load’s rated current. For dual
channel models (D suffix) this signal appears at pin 1 (pin 15 return) of the ANALOG CONTROL
connector (see Figure 2-4). Monitor current using an external voltmeter connected to the BNC
connector or, for dual channel models, across pin 1 and pin 15 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
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 designed for the Series EL Electronic Load are listed in Appendix B.
2.7.1 STANDARD UNITS
If control via the USB or RS 232 computer interface is desired, the computer should be con-
nected to the load via either the USB 2.0 type B connector or the RS-232 interface connector
located at the rear panel.
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.
2.7.2 G OPTION - GPIB INTERFACE
For G option units, 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.
2.7.3 E OPTION - ETHERNET INTERFACE
For E option units, connect a computer to the LAN connector at the rear panel using a standard
RJ 45 Ethernet cable (not supplied). The LAN interface uses a socket connection at Port 5025.