Avago Technologies LSI53C120 - Manual (Page 13)

LSI20101/LSI20102 SCSI Bus Boards 5
2.1 Connectors
The connectors for the LSI20101 Extender board are
•
J1 is a standard disk drive power connector. (AMP 641737-1 or
equivalent)
•
J2 and J3 are 68-pin, high density, shielded, latching, right angle
SCSI connectors. (AMP 787171-7 or equivalent)
•
J4 is a 6-pin unshrouded header. (AMP 104427-4 or equivalent)
2.2 Physical Characteristics
The dimensions of the LSI20101 SCSI Bus Extender board are 3.00 x
4.00 inches. Power connection is made through connector J1. SCSI
connection is made through high density connectors J2 and J3. Board
mounted LEDs or an offboard LED connected to J4 can be used to
display SCSI bus activity and TERMPWR status. Switch pack U4 is
combination with external switches connected to J4 control termination.
The component height on the top of the board is not greater than 0.5
inches.
2.3 Board Mounting
The LSI20101 SCSI Bus Extender board can be mounted in an
enclosure or computer cabinet. The LSI20101 mounting holes are 0.125
inch in diameter. They are located 2.55 x 3.75 inches apart in relation to
the 3.00 x 4.00 inch size of the board. The mounting holes are spaced
equal distances from the edges of the board. (See
Figure 1 .)
2.4 Board Connectors
There are four connectors on the LSI20101 board:
•
Power Connector J1
•
SCSI Connectors J2 and J3
•
LED and SCSI Terminators Control Signals J4