3 Installation3.4 Electrical InstallationDS7 Soft starter 09/16 MN03901001Z-EN www.eaton.com 873.4.8 Relay contactsThe soft starters of the DS7 series are provided with one or two relays withan N/O contact depending on the current range. The relays are galvanicallyisolated from the power section.Table 16: Relay contactsIn applications in which the relay contacts (TOR, RUN / READY) controlexternal contactors, the contactor coil must be connected in order toincrease interference immunity:• for AC voltage with an RC filter,• for DC voltage with free-wheel diode.The illustration below shows the operating points for the Run signals at relaycontacts TOR (13/14) and RUN (23/24).Relays (Controlsignal terminal)Designation Function13/14or -A2/13TOR Top-of-ramp: Signals operation with full voltage on the motor(top of start ramp reached; set time t-Start elapsed).23/24 RUN / READY Operating signal during ramp time (t-Start, t-Stop), as well as duringcontinuous operation (= TOR)Default setting: RUNNote:This relay is only installed in devices of sizes 2, 3 and 4.AC-version DC-versionFigure 66: Relay contacts with permissible load and recommended connectionTOR, RUN/READY34ACAC AC(+)(-)DCDC
