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Specifications are subject to change without notice.
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: 800-321-6699 • Fax: 800-996-3821
ETA-20SH
AC Power Conditioning & Suppression Module
INTERNAL FEATURES OF THE ETA-20SH – PROTECTION BEHIND THE PANEL
• EMI/RFIFilters
ECM filters unwanted Radio Frequency Interference (RFI) that is commonly introduced into the AC lines by nearby radio
transmitters or wireless products. EMI filters are incorporated to reduce noise from Electromagnetic Interference (EMI) produced
by such items as electric motors or switching power supplies. The benefit of these filters can be seen on video products or
audibly by reducing static pops and external signal interference.
• ACSpikeProtection
ECM modules feature AC spike suppression. AC Spikes, or Transients, are commonly caused by utility power plant grid
switchovers. The amount of energy that can be injected into the power system can be immense with voltages reaching 6kV or
amperage peaks of 3000A. These spikes are very fast and usually only last for a very short period of time. To protect against
this potential problem, incoming AC Mains have special suppression circuitry to eliminate the unwanted energy. This circuitry is
very fast and can suppress unwanted energy within a nanosecond, while sustaining the suppression up to 2 milliseconds, thus
ensuring virtually trouble free protection.
• ACSurgeProtection
High line can also be known as surges. Surges usually are a slower steady state rise in voltages ranging from 128VAC and up.
They can be caused by fluctuations in the utility company's power lines or industrial equipment turning on and off, and are on the
same power leg of the building's incoming AC.
• EVSProtection
If an ECM Module is connected to the ETA-ECS6RM, the ETA-ECS6RM has built in intelligence that monitors the AC lines from
the ECM modules and will inform you of potentially damaging voltages. If the AC Mains voltage is between 128VAC and 132VCA
or 107VAC and 101VAC the display will flash an error code indicating a potential fault has occurred and you should check sensitive
equipment. If an extreme voltage swing occurs above 128VAC or below 101VAC, the Extreme Voltage Shutdown (EVS) protection
circuit will automatically turn all remote ECM modules off until the system is manually reset. The EVS feature can be defeated if
required via the ETA-ECS6RM EVS bypass switch.
• OverCurrentProtection
In the case of excessive current draw at the ECM module, an internal Slow Blow fuse will open and protect the devices plugged
in to the ECM module. Note:Thisfusemustbechangedbyaqualifiedservicetechnician.