Sun Microsystems StreamLine SL8500 - Manual (Page 186)

146 StreamLine™ SL8500 Modular Library System User's Guide • March 2007 Revision K • 96154
N
N+1A power configuration that provides AC power and redundant DC power by
adding a second DC power supply to each DC bus. See also 2N.
O
online replacementReplacement or service of a module while the library remains operational. The
service person might be required to power off the module before removing or
replacing it. Synonymous with hot swap.
operator panelSee touch screen operator control panel.
P
pass-thru port (PTP)(1) A mechanism that enables a cartridge to pass through from one library to
another in a multiple modular library complex.
(2) An assembly that connects two SL8500 libraries in which four pass-thru
mechanisms (one for each LSM of the two libraries) can pass cartridges from one
library to the other. Each PTP mechanism holds up to two cartridges.
PCIPeripheral component interconnect.
PDUSee power distribution unit.
physical libraryA single Product Name library consisting of a customer interface module, a
robotics interface module, and a drive and electronics module, with one to three
storage expansion modules optional. See also logical library.
PLCPower line communications.
PLISee primary library interface.
power distribution unit
(PDU)A device for the distribution of AC line power from one inlet to multiple outlets.
Multiple PDUs provide higher availability because the power continues if one
PDU (or its alternating current [AC] source if the PDUs use separate AC sources)
loses power.
power gridA power circuit that minimizes power failures that cause the library to cease
operations.
An Product Name library has five power grids, two for AC power and three for
DC power.
power/communication bus
railA rail that sits on the robot track to provide 48 VDC power and communication to
the robot.