Adaptec 2740A User Manual - Page 33
Install Your Host Adapter and Peripherals
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AHA-2740 Series User's Manual Install Your Host Adapter and Peripherals Once the SCSI bus is properly terminated and each SCSI device is set to a unique SCSI ID, you can physically install your host adapter and SCSI devices: WARNING Turn OFF and disconnect power to the system and external equipment before removing the chassis cover or attempting any motherboard modifications. ® 1 Turn power off, unplug your computer and remove the cover. 2 Install the host adapter in an available EISA slot which supports bus master operations (refer to the host system documentation for details). 3 For internal SCSI devices, connect one end of the 50-pin SCSI ribbon cable to the internal connector on the host adapter; connect the other end to the connector on the internal SCSI device. Make sure to align Pin 1 of the cable with Pin 1 of the connectors on the host adapter and internal SCSI device. 4 To connect a second internal SCSI device, plug the middle connector of the SCSI ribbon cable to the connector on the second internal SCSI device. To connect additional internal SCSI devices to a SCSI bus, you will need to obtain a 50-pin SCSI ribbon cable with enough connectors to accommodate all of your internal SCSI devices. 5 For external SCSI devices, connect one end of the 50-pin shielded cable to the external connector on the host adapter; connect the other end to one of the SCSI connectors of the external SCSI device. External cable connectors are keyed and can only be plugged in one way. To connect subsequent external SCSI devices, you will need to obtain additional shielded cables to chain the devices together. 2-6 Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. C (Page 2-6) Print Spec Number: 491709-00 Rev C Current Date: 9/1/93 ECN Date: 9/14/93