Dell manual J23 External Battery, J19 Setting Onboard Bios Status, Tab l e, 140

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Tab l e 1 0 - 6 . J1 9 O n b o ar d B I O S E n a b l e S e t t i n gs

J19 Setting	Onboard BIOS Status
Unjumpered	Enabled
Jumpered	Disabled

J23 External Battery

J23 is a 5-pin connector that attaches to the optional battery pack. Table 10- 7 displays the J23 pinout.

Tab l e	1 0 - 7 . J 2 3 E xt e r n a l B a t t e r y P i n ou t
Pin	Description
1	+BATT Terminal (red wire)
2	Thermistor (white wire)
3	-BATT Terminal (black wire)
4	BATDQ (no wire)
5	Ground (no wire)

Step 4—Set SCSI Termination

You must terminate the SCSI bus properly. Set termination at both ends of the SCSI cable. The SCSI bus is an electrical transmission line and must be terminated properly to minimize reflections and losses. Termination should be set at each end of the SCSI cable(s), as shown below. Termination is always enabled, regardless of the configuration. However, you can override this setting by setting another state. The Dell default is termination by jumper. Figure 10-3 displays an example of termination.

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PERC 3/QC Hardware Installation