Adaptec 3940UW User Guide - Page 61

Installing the PowerDomain 2940UW/3940UW and Connecting SCSI Devices Setting SCSI Device Termination Termination on some SCSI devices is controlled by a device (such as a switch) located close to the SCSI connector. On other SCSI devices, you must physically remove or install built-in terminators. Refer to the SCSI device documentation to determine how to enable or disable termination on your particular SCSI device(s), or contact a qualified technician to perform the procedure for you. Setting Accelerator Card Termination Use the configuration control utility to change the termination of the PowerDomain 2940UW/3940UW accelerator card. (See Setting Termination on page 3-7.) Termination Examples The following sections show the most commonly used termination configurations. PowerDomain 3940UW with 68-pin External Devices When only the PowerDomain 3940UW external connector for channel A (and/or B) has SCSI devices connected to it, you must enable termination on the last SCSI device. You must also enable termination on the PowerDomain 3940UW. (See Setting Termination on page 3-7 for instructions.) The following illustration shows three external devices connected by three external cables. One external cable is also attached to one of the condensed 68-pin external connectors. 2-49 AAAAAAAAAAAAAAAAAPSPCAAAAAArotuoiAAAwrncAAArtekAAAeSrAAAnNDAAAptAAAeuoDAAAcmmAAAaAAANtbaeAAAieu:AAAnrmAAA2:2AAA/5bAAA921eAAA04r0AAA/0:AAA98U4AAA66AAA9W4AAA3-AAA0/7AAA304AAA9,2AAA4R-AAA00AAAeU0AAAvAAAW.AAABAAAAAAUAAAsAAAeAAArAAA'AAAsAAAEGAAACAAAuAAANiAAAdAAAeDAAAAAAaAAAPtAAAeaAAA:gAAA2AAAe/AAA:2AAA27AAA-/AAA49AAA96AAAAAAAAAAAAAAAAAAAA