HIMA F3328模块卡件,机械设备卡件
c接地连接。图79：电源IC694PWR321、IC694PWR330和IC694PWR 331 4.2模块负载要求下表总结了RX3i模块的最大负载要求（单位：毫安和瓦）。模块按目录号的最后六个字符的字母顺序列出。对于I/O模块，实际负载可能取决于相同最大值下的点数。在本示例中，电源PSA040满足所有模块电源要求。4.2.2负载共享/冗余为了满足应用程序的电源需求，通用背板中可安装多达四个多用途电源。这些电源可以组合起来提供：▪ 负载共享▪ 电源模块冗余▪ 电源冗余这些应用中不能包含其他类型的RX3i电源。4.2.2.1负载共享多用途电源可结合到负载共享应用中。必须遵守以下规则：如果需要多个电源来满足系统负载要求，则必须将多用途电源连接到同一电源，以使它们可以同时通电或断电。每个电源前面板上的开/关开关必须保持在“开”位置。PACSystems*RX3i系统手册第5节GFK-2314T 2019年9月电源95注意事项在负载共享应用中，必须确保负载共享电源模块的开/关开关不会被意外使用。满足系统电源要求所需的最小数量的电源必须始终将其开关保持在接通位置。此外，负载共享电源必须通过同一外部开关连接到系统电源。系统必须仅通过外部开关通电和断电。如果单个电源使用其开/关开关或单独的外部开关通电或断电，导致电源容量不足，可能会导致设备损坏。可能需要重新加载PLC操作系统以恢复操作。4.2.2.2负载共享连接在负载共享安装中，超过系统负载最低要求的额外多用途电源可以连接到同一电源或不同电源。多用途电源多用途电源电源多用途供电电源A电源B外部开关设备额外电源可选连接到不同电源示例：满足负载要求所需的电源图80：负载共享PACSystems的电源连接*RX3i系统手册第5节GFK-2314T 2019年9月电源电源96 4.2.2.3电源模块冗余连接电源模块冗余可以通过使用一个额外的多用途电源来提供，该电源高于系统电源负载所需的最小值（图81）。在这种类型的安装中，所有多用途电源提供背板电源的一部分，并以相应降低的负载运行。这会延长单个电源的使用寿命。此外，如果一个电源模块发生故障，系统操作不会中断。前面板开关可用于移除冗余单元。注意，这种类型的系统不提供防止输入电源丢失的保护。如果关闭了多个电源，剩余的电源可能会过载并关闭。在电源冗余模式下，必须使用外部开关设备一次切断多个电源的电源。多用途电源多用途电源多种用途电源多功能电源A此额外电源提供电源模块冗余示例：满足负载要求所需的三个电源可选电源B图81：冗余电源连接4.2.2.4电源冗余如果可以满足系统的总体电源需求使用一个或两个多用途电源，则可以提供电源冗余。这需要使用两倍于满足系统负载要求所需的最小数量的多用途电源。
onnection to earth ground. Figure 79: Outputs of Power Supplies IC694PWR321, IC694PWR330, and IC694PWR331 4.2 Module Load Requirements The following table summarizes the maximum load requirements in milliamps and Watts for RX3i modules. Modules are listed alphabetically by the last six characters of the catalog number. For I/O modules, the actual load may depend on the number of points on at the same maximum In this example, all of the module power requirements are met by Power Supply PSA040. 4.2.2 Load Sharing / Redundancy To meet the power needs of the application, as many as four multi-purpose power supplies can be installed in a Universal Backplane. These power supplies can be combined to provide: ▪ Load Sharing ▪ Power Supply Module Redundancy ▪ Power Source Redundancy No other types of RX3i power supply can be included in these applications. 4.2.2.1 Load Sharing Multi-purpose power supplies can be combined into load sharing applications. The following rules must be observed: If multiple power supplies are required to meet the system load requirements, Multi-purpose power supplies must be wired to the same power source in such a way that they all can be powered up or powered down simultaneously. The On/Off switch on the front-panel of each of the power supplies must be left in the On position. PACSystems* RX3i System Manual Section 5 GFK-2314T Sept. 2019 Power Supplies 95 CAUTION In a load-sharing application, it is important to ensure that the load-sharing power supply modules’ On/Off switches cannot be inadvertently used. The minimum number of power supplies needed to meet the system power requirements MUST have their switches always kept in the On position. Also, the load-sharing power supplies must be connected to the system power source through the same external switch. The system must be powered up and powered down only from the external switch. If individual power supplies are powered up or powered down using their On/Off switches or separate external switches, resulting in insufficient power capacity, equipment damage may result. It may be necessary to re-load the PLC operating system to resume operation. 4.2.2.2 Connections for Load Sharing In load-sharing installations, additional multi-purpose power supplies above the minimum required for the system load may be wired to the same power source, or to a different source. Multipurpose Power Supply Multipurpose Power Supply Multipurpose Power Supply Multipurpose Power Supply Power Source A Power Source B External Switching Device Extra Power Supply Optionally Connected to Different Source Example: Power Supplies Needed to Meet Load Requreements Figure 80: Power Supply Connections for Load Sharing PACSystems* RX3i System Manual Section 5 GFK-2314T Sept. 2019 Power Supplies 96 4.2.2.3 Connections for Power Supply Module Redundancy Power supply module redundancy can be provided by using one additional multi-purpose power supply above the minimum required for the system power load (Figure 81). In this type of installation, all Multipurpose power supplies contribute a share of the backplane power and run at a correspondingly reduced load. This results in longer life for the individual power supplies. In addition, should one power supply module fail, system operation is not interrupted. The front panel switch can be used to remove a redundant unit. Note that this type of system does not provide protection against loss of the input power source. If more than one power supply is switched off, the remaining power supplies may become overloaded and shut down. An External switching device must be used to remove power from more than one power supply at a time in the Power Supply Redundancy mode. Multipurpose Power Supply Multipurpose Power Supply Multipurpose Power Supply Multipurpose Power Supply Power Source A This Extra Power Supply Provides Power Supply Module Redundancy Example: Three Power Supplies Needed to Meet Load Requirements Optional Power Source B Figure 81: Redundant Power Supply Connections 4.2.2.4 Power Source Redundancy If the overall power needs of the system can be met using either one or two Multi-purpose power supplies, then power source redundancy can be provided. This requires using twice the minimum number of Multipurpose power supplies required to meet the system load requirements.
