Dell Online Rack 5600R OL HV-US User Manual

Also see for K812N: Getting Started With Your System Getting started User guide User guide

Contents

25Installation |5 Make any necessary provisions for cord retention and strain relief.NOTE: Verify that the total equipment ratings do not exceed the UPS capacity to prevent an overload alarm.Installing Remote Emergency Power-offREPO is used to shut down the UPS from a distance. For example, this feature can be used for shuttingdown the load and the UPS by thermal relay, in the event of room overtemperature. When REPO isactivated, the UPS shuts down the output and all its power converters immediately. The UPS logicpower remains on to issue an alarm.The REPO feature shuts down the protected equipment immediately and does not follow the orderlyshutdown procedure initiated by any power management software. Any devices that are operating onbattery power are also shut down immediately.When the REPO switch is reset, the equipment will not return to utility or battery power until the UPSis manually restarted.The REPO contacts are normally open.WARNING: The REPO circuit is an IEC 60950 safety extra low voltage (SELV) circuit. This circuit must beseparated from any hazardous voltage circuits by reinforced insulation.CAUTION: The REPO must not be connected to any utility connected circuits. Reinforced insulation to theutility is required. The REPO switch must have a minimum rating of 24 Vdc and 20 mA and be a dedicatedlatching-type switch not tied into any other circuit. The REPO signal must remain active for at least 250 ms forproper operation.CAUTION: To ensure the UPS stops supplying power to the load during any mode of operation, the inputpower must be disconnected from the UPS when the emergency power-off function is activated.NOTE: For Europe, the emergency switch requirements are detailed in Harmonized document HD-384-48 S1,“Electrical Installation of the Buildings, Part 4: Protection for Safety, Chapter 46: Isolation and Switching.”REPO ConnectionsWire Function Terminal Wire Size Rating Suggested Wire SizeREPO 4–0.32 mm2 (12–22 AWG) 0.82 mm 2 (18 AWG)NOTE: The pins must be open to keep the UPS running. If the UPS shuts down because the REPO connectorpins are shorted, restart the UPS by re-opening the REPO connector pins and turning on the UPS manually.Maximum resistance in the shorted loop is 10 ohm.NOTE: Always test the REPO function before applying your critical load to avoid accidental load loss.