Connecting Cables

SCSI Connection

SCSI Connection

The built-in SE SCSI port is implemented using an NCR710 macrocell inside the I/O ASIC chip. This 8-bit single-ended implementation is compatible with the current Series 700 products and supports 5 MB/sec data transfer rates.

The SCSI bus is terminated to 3.3 volts through 127 Ohms on the system board. If the board computer is used in a VMEbus chassis having internal mass storage devices, those devices must have their terminators removed. If an external disk drive is used, an active terminator must be used on the last drive’s uncabled connector.

Figure 4-10shows the SCSI connector.

Figure 4-10

SCSI Connector

Table 4-9shows the SCSI connector pinouts.

4-22