3Com 3C81600 User Guide - Page 14

14 CHAPTER 1: INTRODUCING THE ADVANCED RPS accepts its mains power from two AC sources that can be from separate phases. 3Com require that you confirm that your chassis supports the dual phase feature by checking that "3C16071A" or "3C16071B" appears on the serial number label on the base of the chassis, the front panel overlay, and also on the packaging label. If the "A" or "B" suffix is not shown, the 3C16071 does not provide dual phase support and must be powered from AC sources of the same phase. As the Advanced RPS chassis (3C16071B) can be powered from different phases, it is possible to connect one of the mains inlets to an Uninterruptible Power System (UPS), such as the SuperStack UPS. The Advanced RPS chassis will always draw power through mains inlet A (labelled Primary Pwr A) in preference to inlet B (labelled Backup Pwr B). You should ensure that your primary power source is always connected to inlet A, and the backup supply connected to inlet B. If the power to inlet A fails, the chassis will reset and switch to use inlet B. If the power to inlet A recovers, the chassis will reset again and change back to use its primary power source, inlet A. The reset time is approximately 13 seconds. Power Module Slots You can fit a selection of power modules into the chassis. Refer to "Power Modules" on page 15 for details of the power modules available to fit in the chassis. The numbering of the power module slots, when looking at the rear of the unit, is: s Top row (left to right) - 7, 5, 3, 1 s Bottom row (left to right) - 8, 6, 4, 2 Management Module Slot You can use this slot to install an optional management module (3C16080) into the rear of the Advanced RPS chassis. It allows full management of the Advanced RPS via SNMP (Simple Network Management Protocol). With an SNMP manager, such as the 3Com Transcend® Network Manager, you have access to the management data over a network connection. You can also receive traps sent by the module.