Seagate A & B, ST43402ND I/O board J01 and J03 jumpers, Terminator Power J01A is for, J01B

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

= Jumper	J01B
connected	Port B I/O

= Jumper not connected

= Non-applicable jumper (not relevant to the option discussed)

J03

Enable/Disable Port A (EPA)

Ground (GND)

Enable/Disable Port B (EPB)

Ground (GND)

J01A

Port A I/O

	EPA		J01
	GND
Enable/Disable Port A	EPB	GND	(A & B)
			4		3
Enable Port A			2		1
Disable Port A		Terminator Power J01A is for		4	3
		Port A and J01B is for Port B.
		Assign the terminal power		2	1
Enable/Disable Port B		jumpers as shown below.
Enable Port B		Internal terminator power source.
		External terminator power source.
Disable Port B		Internal terminator power to I/O.

Enable Port A and Port B

Simultaneously

Use jumpers to connect the four pins as illustrated.

Figure 12. ST43402ND I/O board J01 and J03 jumpers