Remote Sense Configuration; Parallel Connection - Ametek Amrel PLA Series Operation Manual

REMOTE SENSE CONFIGURATION

CAUTION
Turn off the electronic load before making any connections on the rear panel terminal block.
In remote sense operation, the electronic load senses the input at output terminals of the source. As shown in figure 2 .4,
the remote sense terminals of the Load are connected to the output of the source. Remote sensing compensates for the
voltage drop in applications that require long leads. It is useful in any operating mode requirin g accurate voltage read
back. Load leads should be bundled or tied together to minimize inductance.
Note: Use the largest gauge size, lowest inductance and shortest possible length for the sources line.
DC Power Supply
PARALLEL CONNECTIONS
The electronic loads can be connected in parallel to increase power dissipation and allow current sharing. Numerous
Electronic Loads can be directly paralleled in CC or CRM or CP mode, with the proper setup and configuration. Parallel
operation in all operating modes is recommended when using the external control port to send in an in-sync external
control signal. By utilizin g an external control signal and ensuring all eLOAD are identical in model, operating range and
mode; synchronized parallel eLOAD operation can be achieved, providing optim ized performance and results. As a rule
of thumb, parallel Load Bank operation is for current sharing amongst a number of loads, to ease the overpower
restrict ions of a sin gle load. In short, parallel operation increases the power handling capability for high current and high
voltage applications. Each Electronic Load will d issipate the power it has been programmed for. If two Electronic Loads
are connected in parallel, with Load 1 programmed for 10 A and Load 2 programmed for 15 A, the total current dr awn
from the source is 25 A. In another scenario, if Load 1 is pro grammed for 0.5 ohm and Load 2 is programmed for 0.5
ohm, the total equivalent resistance of the two paralleled Loads is 0.25 ohm. eLOAD (with firmware version 2.86 or
later) offers an advance control of parallel operation; please refer to Appendix B section 11 for "Master-Slave Parallel
Operation" step-by-step procedures and important details.
M470039-01 REV-F
_
+
FIGURE 2.4 REMOTE SENSE CONFIGURATIONS
PROGRAMMING
ELECTRONIC LOAD
–
(-) Sense Pin – 2 at External Programming Port
+
(+) Sense Pin – 1 at External Programming Port
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