Terminating Scsi Devices - Siemens SIMATIC RI 45 PIII Series Manual

SCSI Option
Caution
!
Do not connect SCSI devices to all three connectors of an AHA-2940 Ultra
Wide host adapter!
Figure 7-2
Termination Enabled
Figure 7-3
7.4.3

Terminating SCSI Devices

Read the device's documentation to determine how to enable or disable
termination on your particular SCSI device(s). On most internal SCSI devices
the termination setting is controlled by a jumper or a switch. On other
internal SCSI devices you must physically remove or install resistor
module(s). On most external SCSI devices, a terminating plug (a resistor
pack embedded in a small plug) is installed or removed to control
termination (see Figure 7-4).
7-14
Cable with Terminator
No Termination
Terminated by Cable
No Termination
Internal Termination
Termination Enabled
No Termination
No Termination
Internal and External Termination
No Termination
No Termination
No Termination
terminated by cable
RI 45 PIII, Manual
C79000-G7076-C817-01
Cable with
Terminator