UG-277 datasheet(12/24 Pages) AD

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UG-277

SDP User Guide

Rev. B | Page 12 of 24

The mating daughter board 120-pin connector is the Hirose

FX8-120S-SV(21), 120-pin receptacle, FEC 132-4660, Digi-Key

H1219-ND. Consult the connector's data sheet for full details

on the connector. Note that Pin 1 to Pin 60 are placed on the

left side of the connector and Pin 61 to Pin 120 are placed on

the right side of the connector.

Keep Out Area

In order to allow the greatest flexibility for future controller

boards, a keep out area is established for components higher

that 3 mm. The keep out area is 12.65 mm wide and extends

down the entire left side of the daughter board.

Restriction on Right Angle Connectors

Due to the close proximity of the edges of the A and B daughter

boards (seen in Figure 4) right angle connectors are not allowed

on the top and left edges of the daughter boards and (if

required) should be placed on the right or bottom edges. The

phrase "right angle connector" is used to describe any connector

that requires the connection to protrude over the edge of the

board (for example, right angle SMB or screw terminal)

MECHANICAL SPECIFICATIONS

The mechanical specifications of the SDP-B board are 2.75" ×

2.25" (69.85 mm × 27.15 mm). The height of the 120-pin con-

nectors from the bottom of the board is approximately 0.152"

(3.86 mm). The tallest component on the top is approximately

0.125" (3.175 mm), and the tallest components on the bottoms

are the connectors at approximately 0.152" (3.86 mm). Refer to

Figure 6.

POWER

CON B

STATUS

CON C

CON B

0.152”/8.86mm

LED

CON B

2.75”

69.85mm

2.25”

57.15mm

0.125”/3.17mm

0.21875”/5.54mm

CON C

Figure 6. SDP-B Board Mechanical Specifications

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