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18 StreamLine™ SL8500 Modular Library System User's Guide • March 2007 Revision K • 96154
■ The two AC power grids distribute 220 VAC to the different Load Sharing Power
Supplies, Electronics Control Module (ECM), and accessory racks.
■ The three DC power grids supply 48 VDC to the tape drives, robots, and front frame
components.
■ The Drive Power Grid supports up to 64 tape drives (with the proper number of
Load Sharing Power Supplies). A single tape drive power supply provides power
for up to 8 tape drives, so at least 8 power supplies are required for 64 tape drives
(in an N+1 configuration).
■ The Robot and Pass-thru Port (PTP) Power Grid supplies power to the robots and
the four pass-thru ports (PTP). A single power supply can power up to four
robots, so two power supplies are required for eight robots.
■ The Front Frame Power Grid is powered by a single Load Sharing Power Supply
that supplies 48 VDC power to the two Cartridge Access Ports if present, one
Turntable, two Elevators, and the Service Safety Door.
Note – The power supply for the Front Frame Power Grid is in the Customer Interface
Module. All the other Load Sharing Power Supplies are located in the Drive and
Electronics Module.
Power Consumption
Power consumption for the library is as follows:
■ Single phase configurations
■ 24 Amps per phase (minimum) – 13.0kW, 44,382 Btu/hr
■ 768 Amps per phase (maximum) – 416 kW, 1.4 M Btu/hr
■ Three phase configurations
■ 40 Amps per phase (minimum) – 13.0 kW, 44,382 Btu/hr
■ 280 Amps per phase (maximum) – 416 kW, 1.4 M Btu/hr
Note – Power cabling must be done by a licensed electrician.
Power Configurations
Two power configurations are available for the SL8500 library:
1. N+1 base power configuration
2. 2N power configuration
N+1 Base Power Configuration
The base power configuration contains one system power distribution unit (PDU) and
one N+1 PDU.