Adaptec 1742A, AHA-1740A, 1744 user manual SCSI Terminators, 1. SCSI Device Termination

EISA-to-Fast SCSI Host Adapter Hardware Installation

SCSI Terminators

The SCSI bus must be terminated correctly to ensure proper op- eration. Only the first and last device on the SCSI bus (cable) should have the terminating resistors installed. All other SCSI devices should have the terminating resistors removed. The fol- lowing figure shows two examples of SCSI device connections to the AHA-1740A/1742A/1744 Host Adapter.

Figure 2-1. SCSI Device Termination

The AHA-1740A/1742A/1744 is a SCSI device, and has socketed on-board terminators that should be removed if both the internal and external host adapter connectors are used. These can be rein- stalled at a later time, if desired. On the AHA-1740A/1742A re- move the RN5, RN6 and RN7 terminators. On the AHA-1744 remove the RN2, RN4 and RN5 terminators.

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