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User Manual
i Series / iX Series 199
9.4 EOS Option
9.4.1 Introduction
This section contains information on the installation and operation of the EOS-1 and EOS-3
electronic output switches to be used with the California Instruments i/iX-series of power
sources.
9.4.2 EOS Revisions
There are two versions of the EOS1 and EOS3. The first generation EOS1 is the original version
and has top assembly number 5100-407-1. The second generation EOS1 adds an additional
output tap at the 80% test level selectable through a front panel switch and has top assembly
number 5100-410-1, Rev A. For the EOS3, the top assembly number remains the same at
5100-407-3. However, the revision of the second generation EOS-3 is Rev E. First generation
EOS-3 units will have an older revision letter. The selection between a 70% tap and an 80% tap
on the EOS-3 must be hard wired which requires removal of the top cover.
Top assembly number and revision information can be obtained from the model number/serial
tag.
Model Generation Assembly Revision
EOS1 1 5100-407-1 D or lower
2 5100-410-1 A
EOS3 1 5100-407-3 D or lower
2 5100-407-3 E
Table 9-21: EOS Versions
9.4.3 General Description
The EOS-1 and EOS-3 electronic output switches are used with the IEC1000-4-11 option (option
–411) to perform IEC1000-4-11 voltage dips and interruptions tests. The –411 option must be
installed in the iX/I power source for the EOS to function. It is configured if the EOS was ordered
with the iX/i AC source. If the-411 option is not present, contact California Instruments at
support@calinst.com for support.
The tests are fully compliant as long as the equipment under test draws less than 70% of the
peak current drive capability of the controlling power source. The EOS-1 may be used with a
5001iX power source for single-phase tests. The EOS-3 may be used with a 15003iX power
system for three phase tests. During IEC1000-4-11 testing the EOS directs power from the iX
source to a multi-tap power transformer and a set of electronic switches. The switches are
opened and closed as required to select the appropriate tap from the transformer to send to the
EOS output. During standard operation, the transformer and switches are bypassed within the
EOS unit.
All control of the EOS unit is performed automatically by the controlling California Instruments iX
power source. The controlling power source automatically detects whether an EOS is operating
in the system or not. If the EOS unit is not powered on and active, the controlling source will still
perform non-compliant IEC1000-4-11 tests. No user controls are provided. Refer to Section 9.2
for instructions regarding performing IEC1000-4-11 tests with this equipment.