•If you are booting your computer from a SCSI hard disk drive con- nected to the SCSI bus, the Boot SCSI ID setting in the SCSISelect utility must correspond to the SCSI ID of the device from which you are booting. By default, the Boot SCSI ID is set to 0. We recommend that you do not change this setting.

•In Windows 95/98, you can use the Device Manager to determine which SCSI ID is assigned to each installed SCSI device.

7.4Terminating the SCSI Bus

To ensure reliable communication on the SCSI bus, the ends of the SCSI bus must be properly terminated. This is accomplished when the device at the end of the each cable, or the end of the cable itself, has a terminator installed (or enabled). Terminators must be removed, or termination must be disabled, on devices between the ends of each cable.

Since the method for terminating a SCSI device can vary widely, refer to the device.s documentation for instructions on how to enable or disable termination. Here are some general guidelines for termination:

•Internal Ultra 160 and Ultra 2 SCSI devices come from the factory with termination disabled and cannot be changed. Proper termination for internal Ultra 160 and Ultra2 SCSI devices is provided by a 68-pin Internal LVD (low voltage differential) SCSI cable, which has a built- in terminator at its end.

•Termination on non-Ultra 160 and Ultra2 internal SCSI devices usually is controlled by manually setting a jumper or a switch on the device, or by physically removing or installing one or more resistor modules on the device.

•Termination on most external SCSI devices is controlled by installing or removing a SCSI terminator. However, termination on some exter- nal SCSI devices is enable or disabled by setting a switched on the back of the SCSI device.

The last external Ultra160 or Ultra2 SCSI device must be terminated with an LVD/SE (low voltage differential/single ended) terminator plug to ensure that the device will operate at its maximum speed. If you use a dif- ferent kind of terminator plug, the data I/O rate will decrease.

By default, termination on the SCSI controller itself is set to Automatic (the preferred method). We recommend that you do not change this default setting.

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Advantech PCA-6187 user manual Terminating the Scsi Bus
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PCA-6187 specifications

The Advantech PCA-6187 is a high-performance industrial PC/104-Plus single-board computer designed to meet the rigorous demands of embedded applications. This robust and versatile board is particularly well-suited for applications in industrial automation, transportation, and telecommunications, where reliability and performance are paramount.

One of the main features of the PCA-6187 is its support for the Intel Pentium M and Celeron M processors, providing a potent combination of processing power and energy efficiency. This architecture allows for the execution of complex computation tasks while maintaining a low thermal profile, making it ideal for environments with limited cooling options. Furthermore, the PCA-6187 offers a wide operating temperature range, from -40°C to +85°C, ensuring reliable functionality in extreme conditions.

The board incorporates advanced memory capabilities, supporting up to 1GB of SDRAM with a 64-bit data bus. A flash disk interface is also available for high-speed storage solutions, making it easier to manage large amounts of data typical in industrial applications. Additionally, the PCA-6187 features several I/O options, including multiple COM ports, USB interfaces, and parallel ports, allowing for extensive connectivity options for various peripherals and devices.

One of the standout characteristics of the PCA-6187 is its PC/104-Plus form factor, which allows for a modular architecture. This design enables developers to easily expand the capabilities of the board by stacking additional PC/104 modules, facilitating the customization of hardware solutions tailored to specific application requirements. The PCA-6187 also includes watchdog timers to ensure system reliability and prevent system lock-ups, which is critical for mission-critical applications.

Furthermore, the PCA-6187 supports various operating systems, including Windows and Linux, providing developers with flexibility in software development. The integration of rich development resources and tools enhances the speed and efficiency of application deployment in diverse environments.

In conclusion, the Advantech PCA-6187 stands out as a powerful and flexible industrial single-board computer, perfectly suited for a wide array of embedded computing tasks. With its robust design, advanced processing capabilities, and extensive connectivity options, it provides an ideal platform for developers aiming to create reliable systems in demanding operational conditions. The PCA-6187 truly embodies the essence of industrial computing, balancing power and efficiency for a wide range of applications.
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