AMETEK i Series - Manual (Page 223)

User Manual
i Series / iX Series 209
9.4.6 Operation
9.4.6.1 General
The EOS-1 is used with a California Instruments i/iX power source to perform testing compliant
with the requirements of IEC1000-4-11. The EOS routes the voltage from the power source to
an internal, tapped power transformer. Voltage from each of four taps is sent through an
electronic switch to the EOS-1 output. During IEC1000-4-11 testing, the controlling California
Instruments power source selects which voltage tap to connect to the EOS output. When
IEC1000-4-11 testing is not active, the controlling power source puts the EOS-1 into bypass
mode, shunting the EOS input terminals directly to the output terminals.
All control of the EOS-1 is performed automatically by the California Instruments power source.
The control signals are sent from the power source to the EOS via the option interface cable.
Refer to Section 9.2 for instructions regarding performing IEC1000-4-11 tests with this
equipment.
The rated operating current for the EOS in active mode is 18.5 amps. If the controlling power
source is set for an RMS current limit greater than 18.5 amps, it will not activate the EOS unit.
An attempt to do so will indicate Error -
222, “Data out of range”. IEC 1000-4-11 tests may still be
run, but in pre-compliance mode with the EOS unit bypassed.
Note that while the EOS is engaged, there is no Function Strobe output. Normally, the function
strobe - outside the transient system - is associated with any output voltage change. When the
EOS is in use however, the function strobe is generated only when the EOS is engaged. This is
because the output is programmed down during relay activation. These strobes are meaningless
and are not related to any output drops occurring through the EOS. During the EOS transients
that use any of the available EOS drop levels, there are no function strobes. Voltage drops that
do not use one of the available fixed drop levels are done by dropping the output of the power
source itself and will result in functions strobes on J22. It is possible to use the OPTION OUT on
the back of the EOS - a DB9 connector, pin 6. The return can be either pine 2, 3 or 4. The
strobe is a low going level that last for only 400 to 500 nsec. This strobe will coincide with drops
performed by the EOS switch.
If the EOS is already in active mode, the controlling power source will not allow its RMS current
limit to be programmed above 18.5 amps.
The EOS-3 is similar to EOS-1 with provision for three-phase operation.