Dell DELL10KWOLHVUS User Manual

Also see for DELL10KWEBM: Getting started

Contents

Dell DELL10KWOLHVUS User Manual Manual pdf 26 page image

26 | InstallationNOTE: Verify that the total equipment ratings do not exceed the UPS capacity to prevent an overload alarm.Connecting the EBM to the UPSIf you are installing an optional EBM, refer to the Dell Online Rack EBM 10 kW Getting Started Guidefor installation instructions.CAUTION: If installing an optional EBM, the EBM must be located below the UPS with no U space betweenthe UPS and EBM. This provides better weight distribution in the rack, easier access to the UPS control panel,and easier routing for the battery cable connections. This also prevents strain between the EBM cord and theUPS connection and possible connection failure.CAUTION: If the UPS is stored or used without an EBM, the battery connector cover on the rear panel of theUPS must be installed as a safety precaution.CAUTION: When connected to the UPS, the EBM will continue to supply power to the UPS, even if the UPSbatteries are disconnected. This is particularly important if the EBM and UPS will be transported whileinstalled in a rack enclosure.Installing Remote Emergency Power-offThe UPS includes a REPO connector that enables you to turn off power at the UPS output receptaclesfrom a customer-supplied switch in a remote location. For example, this feature can be used forshutting down the load and the UPS by thermal relay, in the event of room overtemperature. WhenREPO is activated, the UPS shuts down the output and all its power converters immediately. The UPSlogic power 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.