Eaton 9355 Installation And Operation Manual

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CommunicationEaton 9355 UPS (20/30kVA) Installation and Operation Manual 164201626—Rev F www.eaton.com/powerquality 61Remote Emergency Power-offREPO is used to shut down the UPS from a distance. This feature can be used for shutting down the load andthe UPS by thermal relay, for instance in the event of room overtemperature. When REPO is activated, the UPSshuts down all converters, de-energizes all system relays, trips the battery circuit breaker, and fully powersdown within 1–2 minutes.There are two REPO positions that may be used, normally-open or normally-closed.The pins on the normally-closed REPO connector are connected together. When this connection is open, thelogic circuitry completely shuts down the UPS, thus preventing the power from supplying the load.If the use of normally-closed REPO operation is desired, replace the connector with a normally-closed externalswitch (see Figure 36 on page 51).If the use of normally-open REPO operation is desired, connect a normally-open external switch (see Figure 36on page 51).Note: To restart the UPS, reconnect the REPO connector pins and turn on the UPS manually. The pins mustbe shorted to keep the UPS running. Maximum resistance is 10 ohm.Note: Leave the REPO connector installed in the REPO port on the UPS even if the REPO function is notneeded.CAUTIONl The REPO must not be connected to any utility connected circuits. Reinforced insulation to the utilityis required. The REPO switch must have a minimum rating of 24 Vdc and 20 mA.l To ensure the UPS stops supplying power to the load during any mode of operation, the input powermust be disconnected from the UPS when the emergency power-off function is activated.Relay Output ContactsThe UPS incorporates a programmable relay output with potential free contacts for remote alarm indications(see Figure 36 on page 51). An additional four relay outputs can be obtained with the X-Slot compatible RelayInterface Card.WARNINGThe relay output contacts must not be connected to any utility connected circuits. Reinforced insulationto the utility is required. The relay output contacts have a maximum rating of 10A, 250 Vac or 30 Vdcnominal values.Programmable Signal InputsThe UPS incorporates two programmable signal inputs (see Figure 36 on page 51). Use of non-polar (relay)control input is recommended. The pins must be shorted with maximum resistance of 10 ohm to activate thespecific input.Note: See Figure 46 on page 60 for the polarity and verify these connections if polarity control is required.REPO ConnectionsWire Function Terminal Wire Size Rating Suggested Wire SizeREPO L1 12–22 AWG(4–0.32 mm2 )18 AWG (0.82 mm2 )L2