Dell PERC 4/DC - Manual (Page 11)

Table 3-1. PERC 4/SC Jumper and Connector Descriptions
Figure 3-2. PERC 4/DC Controller Layout
Table 3-2. PERC 4/DC Jumper and Connector Descriptions
Connector Description Type Setting
J1 Internal SCSI connector 68-pin connector Internal high-density SCSI bus connector.
Connection is optional.
J2 NVRAM Clear 2-pin header To CLEAR configuration data, install a jumper.
J3 Serial EPROM 2-pin header To CLEAR configuration data, install a jumper.
J4 Onboard BIOS Enable 2-pin header No jumper = Enabled (Default is Enabled)
With jumper in = Disabled
J5 SCSI Activity 2-pin header Connector for enclosure LED to indicate data transfers. Connection is optional.
J6 Serial Port 3-pin header Connector is for diagnostic purposes.
Pin-1 RXD (Receive Data)
Pin-2 TXD (Transmit Data)
Pin-3 GND (Ground)
J7 External SCSI connector 68-pin connector External very-high density SCSI bus connector.
Connection is optional.
J9 SCSI bus TERMPWR Enable 2-pin header Install jumper to enable onboard termination power. Default is installed.
J10 SCSI bus Termination Enable 3-pin header Jumper pins 1-2 to enable software control of SCSI termination through drive detection.
Jumper pins 2-3 to disable onboard SCSI termination.
No jumper installed enables onboard SCSI termination. This is the default.
D12 - D19 LEDs Indicate problems with the card.
Connector Description Type Settings
J1 I2C Header 4-pin header Reserved.
J2 SCSI Activity LED 4-pin header Connector for LED on enclosure to indicate data transfers. Optional.
J3 Write Pending Indicator 2-pin header Connector for enclosure LED to indicate when data in the cache has yet to be written to the