Seagate ST3450856FC manual Connector requirements, Electrical description, Pin descriptions

9.5.2Connector requirements

Table 26: Recommended mating SCA part numbers

Part description	Positions	Part number	Features
AMP Vertical (SCA sequence)	40	787317-1	With polarization
Berg	40	71781	With polarization
Methode	40	512-220-91-101N	With polarization
Molex	40	717431040	With polarization

The FC-AL SCA device connector is illustrated in Figure 16.

Pin 20

Pin 40

1.618 ± .003 in

(41.1 ± 0.08 mm)

.64 in

(16.24 mm)

1.28in

(32.47 mm)

Pin 1		0.197 ± .003 in	2 places
Pin 21
	(5.00 ± .08 mm)

1.618 ± .003 in

(41.10 ± 0.08 mm)

1.492 ± .009 in

(37.90 ± 0.24 mm)

Mating end Housing

0.264+.007 in –.010 in

(6.71+0.18 mm) (–0.25 mm)

0.226 in min.

(6.50 mm)

0.394 ± .004 in
(10.0	± 0.10 mm)
	0.039 in min.
	(0.75 mm)
	0.024 in min.
	(0.60 mm)
	0.079 ± .010 in
	(2.00 ± .25 mm)
	(initial point
	of contact)

.05 in typ.	Contact (typ.)
(1.27 mm)	.025 in (0.635 mm)

0.106 ± .010 in	0.060 ± .010 in
(2.70 ± 0.25 mm)	(1.52 ± 0.25 mm)
	0.051 ± .006 in 2 places
	(1.30 ± 0.16 mm)

Figure 16. FC-AL SCA device connector dimensions

9.5.3Electrical description

Fibre Channel drives use the FC-SCA connector for:

•DC power

•FC-AL interface

•Drive select (device identification)

•Option selection

•Enclosure Services interface

This 40-pin connector is designed to plug directly into a backpanel. External cables are not required.

9.5.4Pin descriptions

This section provides a pin-out of the FC-SCA and a description of the functions provided by the pins.

Cheetah 15K.6 FC Product Manual, Rev. D 69