Seagate ST43402ND, ST43401N/ND user manual ST43401ND terminator attachment-differential I/O

36 ST43401N/ND, ST43402ND User’s Manual, Rev. B

Figure 18 shows how the terminator resistor-paks are attached on ST43401ND drives (differential I/O). These terminator resistor-paks, which are dual inline packages, mount in sockets in the control board. These terminators are also marked with a dot above pin 1.

If the drive is located at either end of the daisy chain, ensure that it has resistor-pak(s) installed. Refer to information earlier in this section re- garding the terminator power source jumper.

Terminator

Resistor-Paks

(part number

70906701)

Terminator

Power

Source Jumper

Terminator Resistor-Pak (note orientation)

Terminator

Socket

Pin 1

Figure 18. ST43401ND terminator attachment—differential I/O