Eaton S611 User Manual

Also see for S611: Installation leaflet Quick start installation guide Installation leaflet

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16 S611 Soft Starter MN03902011E—May 2012 www.eaton.comUsing Auxiliary ContactsThe S611 soft starter contains two (2) auxiliary contacts toindicate status. Both relays have user defined attributes.Relay contact configuration is selectable in the Advancedconfiguration Menu.Relay 1 uses contacts 13 and 14.The following contact configurations are available for Relay 1:0 = Faulted1 = Not faulted2 = Run (in bypass)—default value3 = Not in bypass4 = Motor energized5 = Motor not energizedRelay 2 uses contacts 96 (common), 97, and 98. Thefollowing contact configurations are available for Relay 2:0 = Faulted—default value1 = Not faultedOften these contacts are used as shown with indicatinglamps (see figures on this page). In some installations, theuser may wish to use an electromagnetic relay for indicationof the status at a remote location for use by a programmablecontroller (PLC), or in a 120 Vac control circuit.If the S611 soft starter is subject to mechanical shock duringoperation, it is possible that these contacts may momentarilyopen, causing nuisance fault tripping of down streamdevices. When used with an indicating lamp, a momentarycontact opening would not be observed. In order to assureproper application, it is suggested that the followingrecommendations be followed:PLC InterfaceIt is suggested that a 20 ms delay be programmed to assurethe contact status before a change of status is indicated. Theapplication and the environmental issues will determine theexact requirements.120 Vac Signal ControlWhen a relay is used in conjunction with an electroniccontrol, it is highly recommended that a noise suppressor beused across the relay coil. In the case of an AC coil, the noisesuppressor is made up of a series connected resistor andcapacitor as shown in the figure below. Usually the delay inthe relay opening is very small, so if the system is subject toshock, a delay should be added in the external control beforethe contact change of state is recognized. The resistor israted 100 ohms at 0.5W. The capacitor is 0.25 μF at 250 Vac.120 Vac Control24 Vdc Signal ControlWhen a relay is used in conjunction with an electroniccontrol, it is highly recommended that a noise suppression/snubber diode be placed across the relay coil as shown in thefigure below. This diode offers two benefits. First, thesuppression of any electrical noise generated when the relaycoil is de-energized. Second, the diode delays the opening ofthe relay slightly as it dissipates the energy stored in therelay coil. This delay is often long enough to compensate forthe potential effects of a mechanical shock opening thecontrol contact. A typical suppression diode is a 1N4001.24 Vdc ControlUsing a Supplemental Line ContactorIn some installations, it may be necessary to use anelectromagnetic contactor in series with the soft starter. Inthis case, it is recommended that the contactor be placed onthe load side of the soft starter. The contactor must beclosed prior to starting the soft starter and remain closeduntil the soft starter has been stopped to ensure proper softstarter and system operation.If an electromagnetic contactor is used on the line side of thesoft starter, additional control circuitry must be supplied bythe user when using edge control to ensure the line power issupplied to the soft starter before control power is applied. Ifthis sequence is not followed, the soft starter will fault oneither a phase loss or zero voltage-crossing fault.If it is desired to place an electromagnetic contactor on theline side of the soft starter when using level control, noadditional control circuitry is required. A start can becompleted when the line power is supplied to the unit afterthe control power, providing the Reset Mode parameter isset to AUTO and the unit has a ready light status with120 Vac on the start terminal.CAUTIONIf the AUTO Reset mode setting is used, CAUTION must beexercised to assure that any restart occurs in the safemanner.–+1314979698BypassReady120 VacSupplyFaultRRR–+1314R979698BypassReady24 VdcSupplyFaultRRwww.comoso.com