Sony MK7807V1 Manual Book page 139

Interface Processor Others
BKSI-2040
The BKSI-2040 IDC CPU board is used in two ways. As a
root controller the board receives commands from a
Server Management System Gateway (SMS/GW)
computer and provides control to other BKSI-2040 boards
used as sub-IDC boards within an SIU-80 interface unit.
As a device controller (sub-IDC board) it provides control
for servers, routers, VTRs and other remote devices.
Each sub-IDC board must be used in conjunction with the
appropriate connection board; BKSI-2041, BKSI-2042,
BKSI-2043 or BKSI-2044.
Applicable Models
SIU-80 System Interface Unit
BKSI-2041
The BKSI-2041 IDC serial link connector board is used in
conjunction with a BKSI-2040 IDC CPU board configured
as a root IDC. The BKSI-2041 provides the interface
connections between the Server Management System
Gateway (SMS G/W) computer and the SIU-80 interface
unit using D-sub 9-pin connectors. It also provides the
interface connections for multiple SIU-80 interface units
operating from a single SMS G/W.
Applicable Models
SIU-80 System Interface Unit
Intelligent Device Controller (IDC) CPU Board
IDC Serial Link Connector Board
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Rear Panel