3Com SuperStack 3C16071B User Manual

Also see for SuperStack 3: Important information User guide Release notes Quick reference guide

Contents

Powering Up the Advanced RPS 27Powering Up the Advanced RPSOnce the Advanced RPS is in place, you can power up the unit.1 Connect the AC power cord(s) to the power sockets (mains ACpower inlets) at the rear of the RPS. The chassis will always drawpower through mains inlet A (labelled Primary Pwr A) in preferenceto inlet B (labelled Backup Pwr B). You should ensure that yourprimary power source is always connected to inlet A, and the backupsupply connected to inlet B. If using just one AC cable connect it tomains inlet A.2 Connect the DC cables to the power modules and SuperStack units,if you have not already done so. See “Connecting the DC Cables” onpage 25.3 Once all the cables are securely connected, the Advanced RPS isready to operate. There is no ON/OFF switch on the Advanced RPS.To start the Advanced RPS, plug the AC power cord(s) into a mainsoutlet.Checking for Correct OperationWhen powered up, the INPUT LEDs should light green. Only one LEDlights if there is only one AC power cord connected. If a powermodule is supplying power to a SuperStack unit then the OUTPUTLED corresponding to this power module will light green. See “LEDs”on page 12.There is an approximate 5-second time delay after power up beforethe power module becomes active and the LED lights on the chassisfront panel.Additional InformationMany products in the SuperStack range have an auto-enable feature.These products are indicated with an asterisk (*) in Appendix C. Thispermits the SuperStack product to be connected to the mains and tothe Advanced RPS at the same time. This is called managedredundancy. With Type 1 and 2 Power Modules configured formanaged redundancy, if the SuperStack unit’s mains fails, theAdvanced RPS will automatically cut in to provide power to theSuperStack unit after about 5 seconds. The unit may reset, as in apower cycle.