ABB REF542PLUS综合保护器装置 多功能保护 PLC模块

REF542PLUS ABB 综合保护器装置 多功能保护 PLC模块

REF542PLUS还支持100BaseTx以太网。基于100BaseTx标准使用非屏蔽双绞线和RJ-45连接器。

这个100BaseTx的最大长度为100米VMIVME-7750上的SVGA端口由英特尔图形与内存控制控制器集线器（GMCH）芯片，带4Mbyte视频DRAM。GMCH是硬件和BIOS兼容行业EGA和SVGA标准，支持VESA高分辨率和扩展视频模式。图形视频如表3-5所示GMCH视频控制器支持的模式。

在主机上提供双通用串行总线（USB）连接前面板。车载USB控制器完全支持标准USB界面USB主机控制器通过以下方式在系统内存和USB之间移动数据：处理和调度数据结构。

控制器执行预定列表，并向系统报告状态。注：VMIVME-7750的默认CMOS设置禁用了USB功能。这允许实时系统有更多的中断和更少的中断延迟。如果USB是启用后，用户必须知道中断共享和延迟将受到影响。

The REF542PLUS also supports 100BaseTx Ethernet. 100BaseTx standard using unshielded twisted pair and RJ-45 connector.

The 100BaseTx has a maximum length of 100 m VMIVME-7750 on SVGA port powered by Intel Graphics and Memory Control Controller Hub (GMCH) chip with 4Mbyte video DRAM. GMCH is hardware and BIOS compatible with industry EGA and SVGA standards and supports VESA high resolution and extended video modes. Table 3-5 lists the graphics video modes supported by the GMCH video controller.

Dual universal Serial bus (USB) connections are provided on the host to the front panel. Onboard USB controller fully supports standard USB interface USB host controllers move data between system memory and USB in the following ways: processing and scheduling data structures.

The controller executes the predetermined list and reports the status to the system. Note: The default CMOS setting of the VMIVME-7750 disables USB functionality. This allows real-time systems to have more interrupts and less interrupt latency. If USB is enabled, the user must know that interrupted sharing and latency will be affected.