ETA Systems ETA-20SH User manual

– 1 – ETAsys.com
Specifications are subject to change without notice.
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: [phone] • Fax: [phone]
ETA-20SH
AC Power Conditioning & Suppression Module
ETA-20SH
AC Power Conditioning & Suppression Module

– 2 – ETAsys.com
Specifications are subject to change without notice.
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: [phone] • Fax: [phone]
TABLE OF CONTENTS
Introduction..............................................................................................................................................3
Applications..............................................................................................................................................3
Safety.......................................................................................................................................................4
Protection Behind the Panel ....................................................................................................................6
Panel Features .........................................................................................................................................7
Wire & Data Considerations ....................................................................................................................8
Using the ETA-20SH as a Standalone Unit..............................................................................................8
ETA-20SH Remote Activation via External Switch ..................................................................................8
ETA-20SH Remote Activation External DCV............................................................................................8
ETA-20SH Interfaced with an ETA-ECS6RM Sequence Controller..........................................................9
ETA-20SH Interfaced with an ETA-ECS3 Sequence Controller .............................................................10
Mounting the ETA-20SH........................................................................................................................10
AC Power Cord......................................................................................................................................10
Troubleshooting as a Standalone Unit ...................................................................................................11
Troubleshooting Using the ETA-20SH with an ETA-ECS3 Controller.....................................................11
Troubleshooting Using the ETA-20SH with an ETA-ECS6RM Controller...............................................12
Specifications.........................................................................................................................................14
ETA-20SH
AC Power Conditioning & Suppression Module

– 3 – ETAsys.com
Specifications are subject to change without notice.
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: [phone] • Fax: [phone]
INTRODUCTION
The ETA Systems ETA-20SH is a 120V 60Hz AC Electrical Control Module (ECM), 20A Single Housing (SH) Power Conditioner and AC
Spike Suppressor that is designed to be used as a standalone unit or in conjunction with an ETA Systems Sequence controller ETA-
ECS6RM or the ETA-ECS3 up to 1000' away.
The ETA-20SH features noise filtering for removing unwanted Radio Frequency Interference (RFI) and EMI filters to reduce noise from
Electromagnetic Interference (EMI) caused by items such 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. If an AC spike or surge appears,
the ETA-20SH also incorporates Clamping Suppression technology to prevent the unwanted energy from getting into your AV system.
Other features include a Manual Bypass Switch, Incoming AC presence LED, Active LED and an AC Fault indicator. When interfaced
with the ETA-ECS6RM Sequencer controller, Extreme Voltage Shutdown (EVS) Circuitry is active, along with Voltage and Current status
readings.
KEY FEATURES
 • 2Outlets,20A
 • RFI/EMINoiseFiltering
 • Spike&SurgeSuppression,DCSCircuitry
 • ExtremeVoltageShutdown(EVS)Below101VorAbove132VACLine
 • ACFaultindicator
 • FuseProtection@20ASlowBlow
 • ManualBypassSwitch
 • IncomingACPresenceLED
 • ActiveOutletLED
 • StatusSignalsOutputforVoltageandCurrent
APPLICATIONS
The ETA-20SH is designed to be flexible for use in a variety of applications. When used with a sequenced controller it allows the
turning of equipment on and off from a remote location to save energy and to reduce an in-rush of current that stresses the main AC
line.ItalsocanbeusedasastandaloneunitforprotectionagainstvoltagesurgesandappliesEMI/RFIfilteringtocleanuptheAC
power at the load source. The following are just a few examples of applications in which the ETA-20SH can be used:
 • Restaurants
 • HousesofWorship
 • Schools
 • HomeTheaters
 • OfficeBuildings
 • SportsBars
 • IndustrialFacilities
ETA-20SH
AC Power Conditioning & Suppression Module

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Specifications are subject to change without notice.
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: [phone] • Fax: [phone]
CAUTION– WHEN INSTALLING THE PRODUCT
 •Plugginginorunpluggingthepowercordwithwethandsmayresultinelectricshock.
 • Nevermovethedevicewiththepowercordpluggedintothewall,asdamagetothepowercordmayresult.
 • Whenunpluggingthecordfromthewall,grasptheplug,NOTthecord.
 • Neverinstallthisdeviceinhumidordustylocations,norindirectsunlight,nearsourcesofheat,orinareaswheresootysmokeor
steam are present. Fire and electric shock may result.
 • Keepallsidesofthedeviceatleast31⁄2" away from objects that may obstruct air flow to prevent the unit's internal temperature
rise.
WARNING – WHEN THE DEVICE IS IN USE
 • Topreventelectricshock,donotremovethedevicecoverastherearehighvoltagecomponentsinside.ReferallservicingtoETA
Systems.
 • Shouldanyofthefollowingirregularitiesoccurduringuse,immediatelyswitchoffthepower,disconnectthepowercordfrom
the AC outlet and contact ETA Systems. Do not to attempt to continue operation of the device as this may cause fire or electric
shock.
  • Smokeorstrangesmellcomingfromtheunit.
  • Ifthedevicefallsorthecaseisdamaged.
  • Ifwateroranymetallicobjectsfallintothedevice.
  • Ifthepowersupplycordisdamagedinanyway.
  • Ifthedeviceismalfunctioning.
 • Donotinsertordropmetallicobjectsorflammablematerialsintotheventilationholesofthedevice'scover,asthismayresultin
electric shock or fire.
 • Donotplaceanymetallicobjectsorcontainerswithliquidonthetopofthedevice.Ifanyliquidspillsintotheunit,fireorelectric
shock may result.
 • Neveroperatethisdeviceortouchthepowersupplycordduringanelectricalstorm,electricshockmayresult.
 • Neverexceedthewattageontheproductwhenconnectingequipment.Fireand/orpropertydamagemayresult.
 • Operatethedeviceonlywiththevoltagespecifiedontheunit.Fireand/orelectricshockmayresultifahighervoltageisused.
 • Donotmodify,kink,orcutthepowercord.Donotplacethepowercordincloseproximitytoheatersanddonotplaceheavy
objects on the power cord, including the device itself, doing so may result in fire or electrical shock.
 • Ensurethatthesafetygroundterminalisconnectedtoaproperground.Neverconnectthegroundtoagaspipeasacatastrophic
disaster may result.
 • Besuretheinstallationoftheproductisstable,avoidslantedsurfacesastheproductmayfallandcauseinjuryorproperty
damage.
CAUTION – WHEN THE DEVICE IS IN USE
 • Neverplaceheavyobjectsontheproduct,causingittofalland/orbreak,resultinginpersonalinjuryandpropertydamage.In
addition, the product itself may fall and cause injury and property damage.
 • ContactETASystemsforinstructionsoncleaningtheinsideoftheunit.Largeaccumulationsofdustinsidetheunitmayresultin
heat buildup and fire.
 • Ensurethatthepowersupplyplugissecurelypluggedintothewalloutlet.Neverallowdusttoaccumulateonthepowerplugor
inside the wall outlet.
 • Whencleaningtheunitortheunitisnottobeoperatedforanextendedtimeperiod,unplugthepowercordfromthewall.
ETA-20SH
AC Power Conditioning & Suppression Module

– 5 – ETAsys.com
Specifications are subject to change without notice.
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: [phone] • Fax: [phone]
SAFETY INSTRUCTIONS
1. Read these instructions.
2. Keeptheseinstructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this device near water.
6. Clean only with dry cloth.
7. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
8. Do not install near any heat sources such as radiators, heat registers, stoves, or other device (including amplifiers) that produce
heat.
9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the
other. A grounding type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your
safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they
exit from the device.
11. Onlyuseattachments/accessoriesspecifiedbythemanufacturer.
12. Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the device. When a
cartisusedusecautionwhenmovingthecart/devicecombinationtoavoidinjuryfromtip-over.
13. This product is equipped with a three-wire grounding-type plug, a plug having a third (grounding) pin. This plug will
only fit into a grounding-type power outlet. This is a safety feature. If you are unable to insert the plug into the outlet,
contact your electrician to replace your obsolete outlet. Do not defeat the safety purpose of the grounding-type plug.
14. Unplug this device during lightning storms or when unused for long periods of time.
15. Refer all servicing to qualified service personnel. Servicing is required when the device has been damaged in any way, such as
power-supply cord or plug is damaged, liquid has been spilled, objects have fallen into the device, the device has been exposed to
rain or moisture, does not operate normally, or has been dropped.
16. To prevent fire or shock hazard. Do not expose this appliance to rain or moisture.
This appliance shall not be exposed to dripping or splashing water and that no object filled with liquids such as vases shall be
placed on apparatus.
17. To completely disconnect this equipment from the mains, disconnect the power supply cord plug from the receptacle.
18. The mains plug of the power supply cord shall remain readily operable.
PA Amplifier
Model AA35
Output Rated 35W
Designed and Engineered
by Atlas Sound
Made In CHINA
RISK OF ELECTRIC SHOCK
DO NOT OPEN
ATTENTION
RISQUE DE DECHARGE ELECTRIQUE
-NE PAS OUVRIR.
WARNING
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK
DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.
CAUTION
´
The lightning flash with arrowhead symbol within an
equilateral triangle is intended to alert the user to the
presence of uninsulated “dangerous voltage “ within the
product’s enclosure that may be of sufficient magnitude
to constitute a risk of electric shock to persons.
The exclamation point within an equilateral triangle is
intended to alert the user to the presence of important
operating and maintenance (servicing) instructions in the
literature accompanying the product.
ETA-20SH
AC Power Conditioning & Suppression Module

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Specifications are subject to change without notice.
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: [phone] • Fax: [phone]
ETA-20SH
AC Power Conditioning & Suppression Module
INTERNAL FEATURES OF THE ETA-20SH – PROTECTION BEHIND THE PANEL
 • EMI/RFIFilters
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.
 • ACSpikeProtection
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.
 • ACSurgeProtection
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.
 • EVSProtection
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.
 • OverCurrentProtection
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:Thisfusemustbechangedbyaqualifiedservicetechnician.

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1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
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PANEL FEATURES
1. Trigger/StatusPortPinIdentification-All signals are of low voltage and current.
Note:Alldatasignalsarelowvoltageunder5V.DONOTMISWIRE or damage may occur.
(+) requires a minimum of 5-24V DC to activate the module with 5mA of current.
Note:TheDCVcanbesuppliedfromanysource.TheEVSprotectionrequirestheETA-ECS6RMforoperation.
G Circuit Ground, Must be of the same circuit as the DCV source.
V AC Voltage Status Signal, this signal reports back to the ETA-ECS6RM the Incoming AC Mains Voltage to the ECM module.
A AC Current Status Signal, this signal reports back to the ETA-ECS6RM the AC Mains Current draw at the ECM module.
D Fault Status Signal, reports to the ETA-ECS6RM fault conditions of an ECM module.
2. ExternalTrigger/ManualOnSwitch–The ETA-20SH has a manual override switch allowing it to be used as a local Power
Conditioner and Surge Suppressor. For it to be remotely monitored and activated, the switch must be in the “External Trigger”
position.
3. IncomingACLED–This LED will illuminate Red when the ECM has incoming AC power present at the module. This LED must
beontooperate.Note:IfthisLEDisnotilluminatingcheckthefollowing:1)Theunitispluggedin,2)TheACMainsBreaker
feeding the AC leg to the ECM module is On, 3) The internal fuse has been damaged, this should only be inspected by an
authorized technician.
4. ActiveLED–ThisLEDwillilluminateGreenwhentheECMmoduleManualSwitchisintheONpositionorthetriggercircuithas
sensed the proper DCV to activate the power on circuit.
Note:IfconnectedtotheETA-ECS6RMandtheEVScircuitisactivatedthisLEDwillnotbeon.TheChannelStatusLED
ontheETA-ECS6RMwillflashindicatingaproblemandwillnotturntheECMmoduleOnuntiltheACMainsvoltageis
stable.
5. ACFaultLED–If damage to the Spike Suppression circuit occurred this LED will illuminate Red. This LED will not turn Off until
repaired.
6. ACMainsOutlet–Two 120V AC 20A outlets.
7. ACMainsPowerCord–9' (3m), 12-gauge
ETA-20SH
AC Power Conditioning & Suppression Module
1 4
3 75
62

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Specifications are subject to change without notice.
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
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ECMDATAWIREANDDISTANCE
The ETA-20SH is one of four different types of ECM Modules requiring the same interface connectivity to the ETA-ECS6RM. All ECM
Modules can be interfaced with the ETA-ECS6RM. For connection between the ETA-ECS6RM and an ECM module, use a 5 conductor
cable that is a minimum of 22 gauge wire. We suggest using CAT5 cable due to the common availability and low cost. Heavy gauge
wire or cable with a high voltage rating are not needed because the data signal and supply voltage are low current. Pay special
attentiontotheportconnectionsandDONOTMISWIREordamagemayoccur.ThedistancebetweentheETA-ECS6RMandtheECM
Module can be up to 1000ft.
USING THE ETA-20SH AS A STANDALONE UNIT
The ETA-20SH can be used as standalone unit for local equipment protection. It does not need to be connected to an ETA-ECS6RM to
operate.YoustillgetprotectionagainstACspikesfromshortpowersurgesandyougetalltheEMI/RFIpowerconditioningfiltering.
Without connecting to an ETA-ECS6RM, the ETA-20SH does not utilize the Extreme Voltage Shutdown (EVS) protection and the Voltage
and Current Status readings. To active the ETA-20SH via an external contact closure or switch plate, set the slide switch to “External
Trigger” and apply the contacts across terminals “+” and “D” shorting them together.
REMOTEACTIVATIONVIASWITCHORDCVTRIGGER
The ETA-20SH can be used as standalone units for local equipment protection. It does not need to be connected to a ETA-ECS6RM to
operate.YoustillgetprotectionagainstACspikefromlighteningorshortpowersurgesandyougetalltheEMI/RFIpowerconditioning
filtering. What you do not utilize is the extreme Voltage Shutdown (EVS) protection and Voltage and Current status readings. The ETA-
20SH must be connected to the ETA-ECS6RM to get the entire benefits of the ETA-20SH. To active the ETA-20SH apply DCV 5 -24VDC
to the “+” and “G” terminals.
WIRINGWITHANETA-ECS6RMSEQUENCERCONTROLLER
Example – ETA-ECS6RM wired to 4 ETA-ECM20 or ETA-ECM20M Modules in the Atlas Power ECM-RACEWY6 and two separate ETA-
15SH and ETA-20SH modules.
ETA-20SH
REMOTE
CONTROL
KEY PAD IN
OUT
SYSTEM CONTROL
LAMP
SYSTEM
MASTER SLAVE1 SLAVE2
0 1 1
0
A
A B C D E
B
0
1
0 1
OFF
ON
NOTE: AFTER CHANGING SWITCH SETTINGS
THE UNIT’S POWER MUST BE RESET 20V DC IN
DELAY TIME
1 SEC 3SEC 6 SEC
0 1 1
0
C
D
E
E
0
1
ENABLE
EVS
DISABLE
0 1
CHANNEL RELAY CONTACTS REMOTE
ACTIVATION
(NO = NORMALLY OPEN)
A NO
CH6
A NO
CH6
A NO
CH6
A NO
CH6
A NO
CH6
A NO
CH6 RMT V IN
GND
EXTSW
STATUS
SIGNAL
DAVG+
TRIGGER
VOLTAGE
STATUS
SIGNAL
DAVG+
TRIGGER
VOLTAGE
CHANNEL 6
TO/FROM ECM-20
CHANNEL 5
TO/FROM ECM-20
CHANNEL 4
TO/FROM ECM-20
CHANNEL 3
TO/FROM ECM-20
CHANNEL 2
TO/FROM ECM-20
CHANNEL 1
TO/FROM ECM-20
STATUS
SIGNAL
DAVG+
TRIGGER
VOLTAGE
STATUS
SIGNAL
DAVG+
TRIGGER
VOLTAGE
STATUS
SIGNAL
DAVG+
TRIGGER
VOLTAGE
STATUS
SIGNAL
DAVG+
TRIGGER
VOLTAGE
1601 Jack McKay Blvd
Ennis, TX 75119
www.etasys.com
Engineered in the U.S.A.
Made in China
ETA-20SH
AC Power Conditioning & Suppression Module
Wiring for Remote Activation via
Switch or DCV Trigger

– 9 – ETAsys.com
Specifications are subject to change without notice.
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: [phone] • Fax: [phone]
ETA-ECS6RMSEQUENCERCONTROLLERINTERFACEWITHETA-20SH
To get maximum use of the ETA-20SH we suggest using the ETA-ECS6RM controller. When the two are interfaced the ETA-ECS6RM
controller not only can remotely turn on the ETA-20SH but it can monitor the AC Mains Voltage and Current of the ETA-20SH. When
mated, the microprocessor in the ETA-ECS6RM can determine if there are any potentially damaging AC Voltages present at the ETA-
20SH and shut it off before damage can occur to sensitive equipment connected.
 1. ECMControlPorts–Up to 6 AC Main circuits can be activated or monitored by the ETA-ECS6RM. Each ECM control port
connects to one of the following ECM modules: ETA-ECM20M, ETA-15SH, ETA-20SH, or the ETA-ECM20. For connection
between the ETA-ECS6RM and an ECM module, use a 5 conductor cable that is a minimum of 22-gauge wire. We suggest
usingCAT5cableduetothecommonavailability.PayspecialattentiontotheportconnectionsandDONOTMISSWIREor
damage may occur. The distance between the ETA-ECS6RM and an ECM module can be up to 1000'.
+ 5VDC
G Circuit Ground
V AC Voltage Status Signal
A AC Current Status Signal
D Fault Status Signal, all signals are of low voltage and current.
 2. RelayContacts–Each Channel of the ETA-ECS6RM also has a Relay contact that works in conjunction with the ECM control
port. Sequencing and timing of these connections are the same as the corresponding ECM channels. Example: Sequence 1
ECM Port output works at the same times CH 1 Relay contact.
Note:AllECMmodulescanbetriggeredusingtheRelaycontactstoactivatetheECMmodule.
ETA-20SH
AC Power Conditioning & Suppression Module
Single ETA-ECM20
Control Port
Relay Contacts

– 10 – ETAsys.com
Specifications are subject to change without notice.
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: [phone] • Fax: [phone]
WiringWithanETA-ECS3SequencerController
ECMDCVTrigger-The ETA-ECS3 can handle 15A of current before the breaker opens. If 15A is not enough current to support your
power requirements you can use the 24VDC trigger to activate an additional power outlet such as the ETA-20SH. This triggered 24VDC
voltage works in conjunction with Sequence 3 timing section. Contact ETA Systems for AC outlet options.
MountingRails–The ETA-20SH can be mounted into most racks that have at least 12" of internal height. The housing has breakaway
rail mounting tabs that make it convenient to secure the raceway in most applications. There are two rails to secure the ETA-20SH to a
cabinetorwall.Multipleslotsareprovidedforeaseofinstallation.Whenmountingtoarackrailsystemuse10/32"x1"screws,when
mounting to a wall surface use two #8 Wood or Metal Screws. To break the rail tabs off, simply bend the rail tabs back and forth with a
pliers until the metal separates.
Note: After the metal breaks, sharp corners may need to be filed to prevent injury.
ACPowerCord–TheETA-20SHcomeswitha9'(3m)12-gaugePowerCord.TheplugtypeisNEMA5-20P
G
W
ETA-20SH
AC Power Conditioning & Suppression Module

– 11 – ETAsys.com
Specifications are subject to change without notice.
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: [phone] • Fax: [phone]
TROUBLESHOOTINGTHEECMMODULEASASTANDALONEUNIT
Note: All troubleshooting should be done by a certified electrician.
Issue1:IncomingACLEDisnotilluminated.
 PossibleCause#1: Incoming AC Mains circuit breaker has tripped due to excessive load.
 ActionNeeded: Check the AC outlet that the ECM is plugged into for 120V AC voltage. If no voltage is present, check to see if
the AC outlet is on a GFI and check to see if it was tripped. If it has not been tripped trace the AC Mains outlet
back to the electrical panel and check the AC Mains breaker to see if it is tripped.
 PossibleCause#2: AC Mains power is ok (120V), internal 20A (ETA-ECM20, ETA-ECM20M, ETA-20SH) Slow Blow fuse is blown.
 ActionNeeded: Open ECM unit and replace the fuse with a Slow Blow type.
Issue2:ACFaultLEDisFlashing.
 PossibleCause: Although the Clamping Suppression circuit virtually assures protection from most transient voltage spikes and
surges, nature has a way of occasionally creating electrical forces that are beyond the capabilities of any device
to absorb without some degree of damage. In the rare instance that this occurs, the clamping circuit can be
damaged during the suppression.
 ActionNeeded: The unit will need to be repaired or replaced. It is important to have all equipment that was connected to
thatETA-20SHModulebeinspectedforproperoperation.Note:TheunitwillstilloperatebutnoACSpikeor
Suppression protection will be available.
Issue3:ECMActiveLEDisnotilluminated.
 PossibleCause: SlideswitchisnotsettoManualON.
Issue4:UnitissettoExternalTrigger,theincomingACLEDisilluminatedbuttheActiveLEDisnotilluminated.
 PossibleCause#1: External Switch is not connected across the “D” and “+” terminals.
 PossibleCause#2: External DCV is not connected across the “+” and “G” terminals.
 PossibleCause#3: External DCV voltage polarity is not correct across the “+” and “G” terminals.
 PossibleCause#4: External DCV voltage is too low to activate the trigger circuit. Must be a minimum of 5VDC.
ETA-20SH
AC Power Conditioning & Suppression Module

– 12 – ETAsys.com
Specifications are subject to change without notice.
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: [phone] • Fax: [phone]
TROUBLESHOOTINGTHEECMMODULEWITHANETA-ECS3
Note: All troubleshooting should be done by a certified electrician.
Issue1:IncomingACLEDontheECMisnotilluminated.
 PossibleCause#1: Incoming AC Mains circuit breaker has tripped due to excessive load.
 ActionNeeded: Check the AC outlet that the ETA-20SH is plugged into for 120V AC voltage. If no voltage is present, check to
see if the AC outlet is on a GFI and check to see if it was tripped. If it has not been tripped trace the AC Mains
outlet back to the electrical panel and check the AC Mains breaker to see if it is tripped.
 PossibleCause#2: AC Mains power is ok (120V), internal 20A (ETA-ECM20, ETA-ECM20M, ETA-20SH) Slow Blow fuse is blown.
 ActionNeeded: Open ECM unit and replace the fuse with a Slow Blow type.
Issue2:ACFaultLEDisFlashingontheECM.
 PossibleCause: Although the Clamping Suppression circuit virtually assures protection from most transient voltage spikes and
surges, nature has a way of occasionally creating electrical forces that are beyond the capabilities of any device
to absorb without some degree of damage. In the rare instance that this occurs, the clamping circuit can be
damaged during the suppression.
 ActionNeeded: The unit will need to be repaired or replaced. It is important to have all equipment that was connected to that
ACMainsLineinspectedforproperoperation.Note:TheunitwillstilloperatebutnoACSpikeorSuppression
protection will be available.
Issue3:UnitissettoExternalTrigger,theincomingACLEDisilluminatedbuttheActiveLEDisnotilluminated.
 PossibleCause#1 External DCV from the ETA-ECS3 is not connected across the “+” and “G” terminals.
 PossibleCause#2 External DCV voltage polarity is not correct across the “+” and “G” terminals.
 PossibleCause#3 External DCV voltage is too low to activate the trigger circuit. Must be a minimum of 5VDC to activate the
ECM module. Possible short in the wiring system.
Issue4:ECMActiveLEDisnotilluminated,incomingLEDisilluminatedbuttheAbnormalLEDontheETA-ECS3isflashing.
 PossibleCause The AC Mains Voltage exceeded 127VAC or the voltage dropped below 107VAC activating the “EVS”
shutdown.
 ActionNeeded The ETA-ECS3 must be re-sequenced to turn off the LED, measure the AC mains before turning On. If the
voltage is between 117VAC and 123VAC you may proceed to reset the ETA-ECS3 by restarting the start up
sequence.Note:Itisimportanttohaveallequipmentthatwasconnectedtothemodulebeinspectedfor
proper operation. If the problem persists, contact your local power company for the cause of unstable AC line
conditions.
ETA-20SH
AC Power Conditioning & Suppression Module

– 13 – ETAsys.com
Specifications are subject to change without notice.
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: [phone] • Fax: [phone]
TROUBLESHOOTINGTHEECMMODULEWITHANETA-ECS6RM
Note: All troubleshooting should be done by a certified electrician.
Issue1:IncomingACLEDontheECMisnotilluminated.
 PossibleCause#1 Incoming AC Mains circuit breaker has tripped due to excessive load.
 ActionNeeded Check the AC outlet that the ETA-20SH is plugged into for 120V AC voltage. If no voltage is present, check to
see if the AC outlet is on a GFI and check to see if it was tripped. If it has not been tripped trace the AC Mains
outlet back to the electrical panel and check the AC Mains breaker to see if it is tripped.
 PossibleCause#2 AC Mains power is ok (120V), internal 20A (ETA-ECM20, ETA-ECM20M, ETA-20SH) Slow Blow fuse is blown.
 ActionNeeded Open ECM unit and replace the fuse with a Slow Blow type.
Issue2:ACFaultLEDisFlashingontheECM.
 PossibleCause Although the Clamping Suppression circuit virtually assures protection from most transient voltage spikes and
surges, nature has a way of occasionally creating electrical forces that are beyond the capabilities of any device
to absorb without some degree of damage. In the rare instance that this occurs, the clamping circuit can be
damaged during the suppression.
 ActionNeeded The unit will need to be repaired or replaced. It is important to have all equipment that was connected to that
ETA-ECM20 Module inspected for proper operation.
Note:TheunitwillstilloperatebutnoACSpikeorSuppressionprotectionwillbeavailable.
Issue3:UnitissettoExternalTrigger,theincomingACLEDisilluminatedbuttheActiveLEDisnotilluminated.
 PossibleCause#1 External DCV from the ETA-ECS6RM is not connected across the “+” and “G” terminals of the ECM module.
 PossibleCause#2 External DCV voltage polarity is not correct across the “+” and “G” terminals.
 PossibleCause#3 External DCV voltage is too low to activate the trigger circuit. Must be a minimum of 5VDC to activate the
ECM module. Possible short in the wiring system.
Issue4:ECMActiveLEDisnotilluminated,IncomingLEDisilluminatedbuttheAbnormalLEDontheETA-ECS6RMdisplayis
flashing“OL”andtheETA-ECS6RMChannelthatisactivatingtheECMmoduleStatusLEDisFlashing.
 PossibleCause The AC Mains Voltage exceeded 127VAC or the voltage dropped below 107VAC activating the “EVS”
shutdown.
 ActionNeeded The ETA-ECS6RM must be re-sequenced to turn off the reset circuit, measure the AC mains before restarting
the ECM module. If the voltage is between 117VAC and 123VAC you may proceed to reset the ETA-ECS6RM
by restarting the start up sequence.
Note:ItisimportanttohaveallequipmentthatwasconnectedtothatETA-ECM20Modulebeinspectedfor
proper operation. If the problem persists, contact your local power company for the cause of unstable AC line
conditions.
Issue5:ETA-ECS6RMChannelActivationStatusLEDisflashingandACpowerattheECMmoduleisactive.
 PossibleCause The AC Mains Voltage at the ECM Module reached between 127-132VAC or the voltage dropped between
107-101VAC.
 ActionNeeded The ETA-ECS6RM must be re-sequenced to turn off the LED, measure the AC mains before restarting the
ECM Module. If the voltage is between 117VAC and 123VAC you may proceed to reset the ETA-ECS6RM by
restarting the start up sequence.
Note:Itisimportanttohaveallequipmentthatwasconnectedtothemoduleinspectedforproperoperation.If
the problem persists, contact your local power company for the cause of unstable AC line conditions.
ETA-20SH
AC Power Conditioning & Suppression Module

– 14 – ETAsys.com
Specifications are subject to change without notice.
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: [phone] • Fax: [phone]
Issue6:NoVoltageReadingattheETA-ECS6RM.
 PossibleCause#1 Check Issues 1 - 4 first.
 PossibleCause#2 Proper Channel is not selected for viewing.
 PossibleCause#3 Channel Activation LED is Illuminated Green but the Voltage display is not on. Check the wiring between the
ETA-ECS6RM Channel and the ECM module. “V”, “A” and “D” must be in the correct polarity.
Issue7:NoCurrentReadingattheETA-ECS6RM,meterreads‘nA’.
 PossibleCause#1 An ETA-ECM20 Module is connected. This module does not support current read out.
 PossibleCause#2 Check Issues 1 - 4 first.
 PossibleCause#3 Current Draw of ECM Module must exceed 500mA to register.
 PossibleCause#4 Proper Channel is not selected for viewing.
 PossibleCause#5 Channel Activation LED is Illuminated Green but the Current display reads “nA”. Check the wiring between
the ETA-ECS6RM Channel and the ECM module. “V”, “A” and “D” must be in the correct polarity.
ETA-20SH
AC Power Conditioning & Suppression Module

– 15 – ETAsys.com
Specifications are subject to change without notice.
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: [phone] • Fax: [phone]
ETA-20SH SPECIFICATIONS
General
 Type AC Power Conditioner & Suppressor Module
 PowerRequirements 120V 60Hz
 PowerConsumption .5W
 RoHSCompliant Yes
Panel
 SwitchedOutlets Two, 20A
 Spike&SurgeSuppression H-N,N-G,H-G
 ManualOverride Slide switch
 ExtremeVoltageShutdown (EVS) Below 101V or Above 132V AC Line (When Used With ETA-ECS6RM)
 Connectors 5 Position Phoenix Euro Block Style
 FuseProtection 20A Slow Blow
 DCVRemoteTrigger 5 – 24DCV
 RemoteTrigger SPST Contact
 StatusSignals Output for Voltage and Current Data (All Signals are Low Voltage and Low Current)
 Indicators Incoming AC, Active, AC Fault
 PowerCord 9'(3M),12-gaugeNEMA5-20P125vACplug
TechnicalData
 CurrentRating 20 amps
 OperatingVoltage 102 to 132 VAC
 HighVoltageSurgeProtection Trigger at 133VAC, 1ms Typically (When Used With ETA-ECS6RM)
 Spike&SurgeSuppression H-N,N-G,H-G
 LowVoltageProtection Trigger 101 VAC, 1ms Typically (When Used With ETA-ECS6RM)
 SpikeProtectionModes Circuitry on Incoming AC Mains.
 MinimumSpikeClampingVoltage 460VRMS@3,000amps
 MaximumSpikeClampingVoltage 6000v
 MaximumSpikeClampingResponseTime 1 nanosecond
 SpikeClampingVoltage@100A 1250Vp for 20µs
 Maximumsurgecurrent 6,500 amps
 EnergyRating@2ms 600 Joules
 NoiseAttenuationEMI/RFISequencer 10dB@10kHz,40dB@100kHz,100dB@10MHz
 TemperatureRange 5° to 35°C
 HumidityRange 5% to 95% R.H.
Mechanical
 ChassisFinish Black
 Mounting Side bracket adjustable
 Dimensions 3.0" H x 8.5" D x 3.5" W (76mm x 216mm x 89mm)
 Weight 5.5lbs (2.49kg)
 AgencyListings MET (UL1449 Code)
ETA-20SH
AC Power Conditioning & Suppression Module

– 16 – ETAsys.com
Specifications are subject to change without notice.
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: [phone] • Fax: [phone]
LIMITEDWARRANTY
AllproductsmanufacturedbyETASystemsarewarrantedtotheoriginaldealer/installer,industrialorcommercialpurchasertobe
free from defects in material and workmanship and to be in compliance with our published specifications, if any. This warranty
shall extend from the date of purchase for a period of one year. Additionally, fuses and lamps carry no warranty. ETA Systems will
solely at its discretion, replace at no charge or repair free of charge defective parts or products when the product has been applied
and used in accordance with our published operation and installation instructions. We will not be responsible for defects caused by
improper storage, misuse (including failure to provide reasonable and necessary maintenance), accident, abnormal atmospheres, water
immersion, lightning discharge, or malfunctions when products have been modified or operated in excess of rated power, altered,
serviced or installed in other than a workmanlike manner. The original sales invoice should be retained as evidence of purchase under
the terms of this warranty. All warranty returns must comply with our returns policy set forth below. When products returned to ETA
Systems do not qualify for repair or replacement under our warranty, repairs may be performed at prevailing costs for material and labor
unless there is included with the returned product(s) a written request for an estimate of repair costs before any non-warranty work is
performed. In the event of replacement or upon completion of repairs, return shipment will be made with the transportation charges
collect.
EXCEPTTOTHEEXTENTTHATAPPLICABLELAWPREVENTSTHELIMITATIONOFCONSEQUENTIALDAMAGESFORPERSONAL
INJURY,ETASYSTEMSSHALLNOTBELIABLEINTORTORCONTRACTFORANYDIRECT,CONSEQUENTIALORINCIDENTAL
LOSSORDAMAGEARISINGOUTOFTHEINSTALLATION,USEORINABILITYTOUSETHEPRODUCTS.THEABOVEWARRANTYIS
INLIEUOFALLOTHERWARRANTIESINCLUDINGBUTNOTLIMITEDTOWARRANTIESOFMERCHANTABILITYANDFITNESSFOR
A PARTICULAR PURPOSE.
ETA Systems does not assume, nor does it authorize any other person to assume or extend on its behalf, any other warranty,
obligation, or liability. This warranty gives you specific legal rights and you may have other rights which vary from state to state.
SERVICE
Should your ETA-20SH require service, please contact the
ETA Systems warranty department at
1-877-689-8055, ext. 277 to obtain an RA number.
ETA Systems Tech Support can be reached at 1-800-321-6699.
Visit our web site at www.ETAsys.com to see other ETA Systems products.
©2009 ETA Systems All rights reserved. ETA003566 RevA 05/09
ETA-20SH
AC Power Conditioning & Suppression Module