Product manual

36 Barracuda 4LP Product Manual, Rev. D
8.1.1 Notes for Figures 7a, 7b, 7c, 7d, and 7e.
[1] Notes explaining the functions of the various jumpers on jumper header connectors J2, J1-Auxiliary and
J6 are given here and in Section 8.1.2. The term “default” means as standard OEM units are configured
with a jumper on those positions when shipped from factory. “Off” means no jumper is installed; “On”
means a jumper is installed. OFF or ON underlined is factory default condition.
[2] The PCB on “N,” “WC,” and “DC” model drives does not have connector J1-Auxiliary. The J1-Auxiliary
connector signals conform to SFF-8009 Revision 2.0, Unitized Connector for Cabled Drives, signal
assignments for auxiliary connectors. See note [4].
[3] Reserved useage. Do not install any jumpers.
[4] Table 4 summarizes the configuration selection possibilities available on the different Barracuda 4LP
model drives.
[5] These signals are also on 80 pin J1. See Table 13d and 13e.
[6] Voltage supplied by the drive.
[7] J1A Drive Activity LED—with series resistor built-in pin 12, is the open collector driver that drives the
external LED minus side low to turn it on. This output is capable of driving >20mA. This is the same signal
as on J6 pin 12, except J1A pin 8 goes through a 220 Ohm resistor. Tie the minus side of the external LED
to this pin.
[8] J6 Drive Activity LED—without series resistor built-in pin 8, is the open collector driver that drives the
external LED minus side low to turn it on. This output is capable of driving >20mA. This is the same signal
as on J1A pin 8, except J6 pin 12 does not go through a 220 Ohm resistor. Tie the minus side of the exter-
nal LED to this pin.