1-2 General Description PLZ-U
1.1 About This Manual
This operation manual covers the following PLZ-U Series Electronic Load Units.
Product version covered
This operation manual covers products with frame ROM version 1.0X and load unit
ROM version 2.0X.
When contacting us about the product, please provide us the following information.
Model
ROM version
Manufacturing number (indicated at the lower section on the rear panel on the
frame and on the top panel on the load unit)
For the procedure of confirming the ROM version, see section 2.6, “Power Up.”
1.2 Product Overview
The PLZ-U Series Electronic Load Unit is a compact, high-performance, multi-
channel electronic load unit that has three operation modes: constant current, con-
stant resistance, and constant voltage.
The PLZ-U consists of a frame and load units. Load units are inserted into the frame
(control section) for operation. The PLZ-30F and PLZ-50F Frames can accommo-
date up to 3 channels and 5 channels of load units, respectively.
The current capacity or power capacity can be increased through a parallel opera-
tion of load units. The load units can be combined to produce a power capacity from
75 W to 750 W (when five PLZ150Us are installed into the PLZ-50F).
In addition to high-speed response and highly precise preset resolution, various
functions are provided including the soft start function, variable slew rates, switch-
ing function, ABC preset memories, four setup memories, and sequence function.
Because the PLZ-U comes standard with GPIB and RS-232C communication func-
tions, it can easily be incorporated into various test and inspection systems. The
communication functions are useful for testing batteries, DC/DC converters,
switching power supplies, and multi-output power supplies.
Frame
• PLZ-50F
• PLZ-30F
Load unit
• PLZ150U
• PLZ70UA
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