v
Receives power and monitors the power supply status using the I
2
C
(inter-integrated) interface to report any error conditions
v
Controls the user interface (LCD display and touch screen) and input/output
(I/O) station via the DIEB
v
Controls media movement and monitors tape drive status
Backplane Connect Boards (BCBs)
The Backplane Connect Board (BCB) is an interconnect device for various library
components. BCBs are found in both the control module and any expansion
module. There are two versions of BCB:
v
BCB1 - control module
v
BCB3 - 9U expansion module
The “Control Module and Expansion Module Electrical System” on page C-6
illustrates the key communication and power paths between BCB boards and other
library components:
v
LCB1 attaches to the BCB1 board
v
BCB1 carries signals from the LCB1 to the servo control and motor driver board
(SMD1)
v
The door and display board (DIEB) signals from the I/O Station pass through
the BCB1 to the LCB1. BCB2 and BCB3 function similarly in supporting the
expansion module's I/O Station.
Power Supplies
There is always at least one power supply in the control module, which provides
_48 volts DC power to the library. If there is one or more drives in the expansion
module, then this module also must have a power supply. Each module's power
supply consists of an AC cable supplying electrical current from a wall outlet and
a +48 V DC power supply. The power supply in the control module powers all
library components within the control module including its drives. The expansion
module's power supply provides power for the drives and BCB boards within the
expansion module.
In the control module, the power supply's rear panel switch provides power to the
library. This power supply connects with the BCB1 board in the library, which
interconnects with the LCB1 in communicating the library's power status. The
BCB1 board in the control module channels power to the Servo & Motor Driver
Boards (SMD1 & SMD2), which operate the robotics assembly. The power supplies
in both the control and expansion modules connect with that module's Drive Sled
Interconnect Board (DSIB) in providing power to the drive sleds.
The control module's front power enable switch is located near the operator panel
on the front of the library. It is connected to the Door & Import/Export Board
(DIEB), which is only found in the control module. This front power switch
enables power to the operator panel interface and the library firmware and
robotics assembly. The control module's power supply provides power to the DIEB
via the BCB interconnect.
Servo & Motor Driver Boards (SMDs)
There are two Servo & Motor Driver Boards (SMDs) in the control module that
perform key functions in operating the robotics assembly for selecting and moving
Appendix C. Library Diagrams
C-3
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Страница 531: ...Spine information IBM System Storage TS3310 Tape Library TS3310 Tape Library Maintenance Information Machine Type 3576...