5X00321G01模块备件

5X00321G01

以及单个内的级模拟输入、触点输入和触点输出
盾在某些系统中，屏蔽用作载流导体。成为
有效，屏蔽与内部信号在同一点接地，但以下情况除外
本文件中另有说明。
噪声小化技术
R3-1150（第3版）2-8 2/03
艾默生过程管理专有2C类
浪涌保护
符合IEEE C37.90.1-1989的浪涌保护（参考ANSI C37.901-1989）
大多数Ovation I/O模块都提供了标准。检查单个模块
可用性或可能的附加条件的说明。
被指定为符合CE标志的Ovation I/O模块具有浪涌
安装在CE标志认证机柜中时，保护如下：
2-7.模拟信号屏蔽技术
为了抑制噪声，考虑小于1伏的模拟信号
低电平和所有模拟信号都需要屏蔽。个别地
所有模拟输入信号布线应使用双绞线和屏蔽线。如果电缆中的每个双绞线都有自己的绝缘屏蔽，则可以使用多对电缆。
使用以下准则屏蔽信号：
•将模拟信号屏蔽接地。
•仅在一端将屏蔽接地，好在信号处接地
来源，除非本文件另有说明。
•将信号的低端连接到信号源的屏蔽。如果盾牌
不能方便地在信号源处或附近接地，在
控制器。理想的模拟信号场连接如图2-3所示。
规格等级
EN 61000-4-3（辐射场抗扰度）10 V/m
EN 61000-4-4（电气快速瞬变抗扰度）1 Kv
EN 61000-4-5（浪涌抗扰度）1 Kv
EN 61000-4-6（传导射频抗扰度）*10 V rms
*HART模拟输入和HART模拟输出模块满足3V rms的降低水平。
噪声小化技术
2/03 2-9 R3-1150（第3版）
艾默生过程管理专有2C类
•将屏蔽（未断开）从传感器延伸至
模拟输入模块处的模数（A/D）前端。（参见“电缆
“规划和安装您的Ovation系统”U3-1000中的“指南”
用于CE中特殊考虑的快速以太网的FDDI和U3-1005
标记认证系统。）在下列情况下，保持接线盒的屏蔽连续性：
使用。
图2-4显示了推荐的典型热电偶模拟信号接线
Ovation用户。
图2-5显示了推荐的传感器模拟信号接线。
图2-3理想模拟信号现场连接
A/D
A/D防护
扭排

5X00321G01

5X00321G01

and high-level analog inputs, contact inputs, and contact outputs within a single shield. Shields are used as current-carrying conductors on some systems. To be effective, shields are grounded at the same point as the signals within, except as otherwise noted within this document. Noise Minimization Techniques R3-1150 (Rev 3) 2-8 2/03 Emerson Process Management Proprietary Class 2C Surge Protection Surge protection to IEEE C37.90.1 -1989 (Reference ANSI C37.90.1-1989) standards is provided on most Ovation I/O modules. Check individual module descriptions for availability or possible additional conditions. Ovation I/O modules, designated as being CE Mark compliant, have surge protection as follows when installed in CE Mark certified cabinets: 2-7. Analog Signal Shielding Techniques For noise suppression purposes, analog signals of less than one volt are considered low-level and, as is the case with all analog signals, require shielding. Individually twisted and shielded pairs should be used for all analog input signal wiring. Multipair cable can be used if each twisted pair in the cable has its own insulated shield. Use the following guidelines to shield signals: • Ground the analog signal shield. • Ground the shield at one end only, preferably to a single point at the signal source, except as otherwise noted in this document. • Connect the low side of the signal to the shield at the signal source. If the shield cannot be conveniently grounded at or near the signal source, ground it at the Controller. An ideal analog signal field connection is shown in Figure 2-3. Specification Level EN 61000-4-3 (Radiated Field Immunity) 10 V/m EN 61000-4-4 (Electrical Fast Transient Immunity) 1 Kv EN 61000-4-5 (Surge Immunity) 1 Kv EN 61000-4-6 (Conducted Radio Frequency Immunity) *10 V rms *The HART Analog Input and HART Analog Output modules meet a reduced level of 3V rms. Noise Minimization Techniques 2/03 2-9 R3-1150 (Rev 3) Emerson Process Management Proprietary Class 2C • Run the shield (unbroken) from the transducer to the shield terminal of the Analog to Digital (A/D) front-end at the Analog Input module. (Refer to “Cable Guidelines” in “Planning and Installing Your Ovation System”U3-1000 for FDDI and U3-1005 for Fast Ethernet for special considerations used in a CE Mark certified system.) Maintain shield continuity at junction boxes when they are used. Figure 2-4 shows the typical thermocouple analog signal wiring recommended for the Ovation user. Figure 2-5 shows the recommended sensor analog signal wiring. Figure 2-3. Ideal Analog Signal Field Connection A/D A/D Guard Twisted Pai