RUGGEDCOM RSG2488 安装指南

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"RUGGEDCOM RSG2488 是一款坚固型网络设备，主要用于工业环境中的通信。这款设备的安装指南提供了详细的安装步骤、通信端口信息、技术规格、尺寸图纸以及认证信息。该文档由Siemens Canada Ltd.版权所有，未经许可不得复制或传播。尽管Siemens已尽力确保手册内容与产品一致，但可能存在产品与文档的差异，并且不承担由此产生的任何责任或后果。" 详细说明： RUGGEDCOM RSG2488是一款由Siemens Canada Ltd.制造的坚固型网络设备，特别设计用于在极端环境条件下提供稳定可靠的通信服务。"RUGGEDCOM"这一名称表明了设备的耐用性和抗恶劣环境的能力，适合在工业、交通和户外应用等严苛环境中使用。 "Installation Guide"是用户成功安装和配置RSG2488的关键文档。手册的" Preface"部分通常包含出版日期、版权信息以及使用文档的法律条款。在本案例中，用户被警告未经书面许可，不得传播或复制该文档内容，违反规定可能会引起法律纠纷。 "Introduction"章节会介绍设备的基本信息和目标应用，帮助用户理解设备的用途和优势。"Installing the Device"部分将详细介绍设备的物理安装步骤，包括如何定位、固定和连接电源等。 "Communication Ports"章节会列出设备的所有通信接口，如以太网端口、串行端口或其他特殊接口，以及如何配置这些接口进行网络连接。这对于网络集成和故障排查至关重要。 "Technical Specifications"提供了设备的技术参数，包括硬件性能、电源需求、环境耐受性等，这些信息对于确定设备是否符合特定项目的需求非常有用。 "Dimension Drawings"部分通常包含设备的实际尺寸图，方便用户规划安装空间，确保设备能适应预设位置。 "Certification"章节会列出设备通过的相关安全和合规认证，如EMC（电磁兼容性）、UL（美国安全检测实验室）或CE（欧洲联盟的符合性标志），这证明设备满足特定区域的法规和标准。最后，"Disclaimer of Liability"部分明确指出，尽管Siemens已经尽力确保手册的准确性，但并不能保证完全无误，因此对于因文档错误或遗漏导致的任何间接损害，Siemens不承担责任。这份RUGGEDCOM RSG2488的安装指南是用户成功部署和操作该设备的重要参考资料，包含了所有必要的技术信息和操作指南。

Chapter 1

Introduction

RUGGEDCOM RUGGEDCOM RSG2488

Installation Guide

4 AM and TTL Outputs

Synchronization Source Without PTP Card With PTP Card

GPS

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NTP

NTP (Network Time Protocol) is the standard for synchronizing the clocks of computer systems throughout the

Internet and is suitable for systems that require accuracies in the order of 1 ms.

IRIG-B PWM

IRIG-B time synchronization is an even older, established, inter-device time synchronization mechanism providing

accuracy in sub-milliseconds.

GPS

The Global Positioning System (GPS), as a source of accurate time, requires an external GPS antenna input

to provide accurate time signals comparable to 500 ns. The RSG2488 can use the GPS receiver on the PTP

module to provide the time base for the system.

IEEE 1588

IEEE 1588 is designed to provide networked, packet-based time synchronization between different networking

nodes (PTP devices). The RSG2488 supports PTP v2, which is defined in the IEEE 1588-2008 standard. IEEE

1588 is designed to fill a niche not well served by either of the two older, dominant protocols, NTP and IRIG-B.

IEEE 1588 is also designed for applications that cannot bear the cost of a GPS receiver at each node or for which

GPS signals are inaccessible.

The RSG2488 supports ordinary clock, boundary clock, peer-to-peer transparent clock, and end-to-end

transparent clock modes. An ordinary clock can be configured as either a Grandmaster Clock (GM) or a Slave

Clock (SC) within the master-slave hierarchy.

Every Ethernet port on the RSG2488 supports IEEE 1588. For more information, refer to Section 1.3.3, “IEEE

1588 Support”.

Section 1.3.2

AM and TTL Outputs

The PTP card provides AM (Amplitude Modulated) and TTL (Transistor-Transistor Logic) outputs.

The AM OUT port supports the IRIG-B AM signal format, while the TTL OUT port supports the IRIG-B PWM

and PPS signal formats. Enabling/disabling the output ports and – in the case of TTL OUT – selecting the signal

format is controlled through the RUGGEDCOM ROS operating system.

The number of devices that can be connected to the AM OUT and TTL Out ports is dependent on the cabling

type and length, as well as the input impedances of the devices. The following simplified circuit schematic shows

the interface between an IRIG-B source and connected devices.

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