HIMA F3328模塊卡件,機械設備卡件
c接地連接。圖79：電源IC694PWR321、IC694PWR330和IC694PWR 331 4.2模塊負載要求下表總結了RX3i模塊的最大負載要求（單位：毫安和瓦）。模塊按目錄號的最后六個字符的字母順序列出。對于I/O模塊，實際負載可能取決于相同最大值下的點數。在本示例中，電源PSA040滿足所有模塊電源要求。4.2.2負載共享/冗余為了滿足應用程序的電源需求，通用背板中可安裝多達四個多用途電源。這些電源可以組合起來提供：? 負載共享? 電源模塊冗余? 電源冗余這些應用中不能包含其他類型的RX3i電源。4.2.2.1負載共享多用途電源可結合到負載共享應用中。必須遵守以下規則：如果需要多個電源來滿足系統負載要求，則必須將多用途電源連接到同一電源，以使它們可以同時通電或斷電。每個電源前面板上的開/關開關必須保持在“開”位置。PACSystems*RX3i系統手冊第5節GFK-2314T 2019年9月電源95注意事項在負載共享應用中，必須確保負載共享電源模塊的開/關開關不會被意外使用。滿足系統電源要求所需的最小數量的電源必須始終將其開關保持在接通位置。此外，負載共享電源必須通過同一外部開關連接到系統電源。系統必須僅通過外部開關通電和斷電。如果單個電源使用其開/關開關或單獨的外部開關通電或斷電，導致電源容量不足，可能會導致設備損壞。可能需要重新加載PLC操作系統以恢復操作。4.2.2.2負載共享連接在負載共享安裝中，超過系統負載最低要求的額外多用途電源可以連接到同一電源或不同電源。多用途電源多用途電源電源多用途供電電源A電源B外部開關設備額外電源可選連接到不同電源示例：滿足負載要求所需的電源圖80：負載共享PACSystems的電源連接*RX3i系統手冊第5節GFK-2314T 2019年9月電源電源96 4.2.2.3電源模塊冗余連接電源模塊冗余可以通過使用一個額外的多用途電源來提供，該電源高于系統電源負載所需的最小值（圖81）。在這種類型的安裝中，所有多用途電源提供背板電源的一部分，并以相應降低的負載運行。這會延長單個電源的使用壽命。此外，如果一個電源模塊發生故障，系統操作不會中斷。前面板開關可用于移除冗余單元。注意，這種類型的系統不提供防止輸入電源丟失的保護。如果關閉了多個電源，剩余的電源可能會過載并關閉。在電源冗余模式下，必須使用外部開關設備一次切斷多個電源的電源。多用途電源多用途電源多種用途電源多功能電源A此額外電源提供電源模塊冗余示例：滿足負載要求所需的三個電源可選電源B圖81：冗余電源連接4.2.2.4電源冗余如果可以滿足系統的總體電源需求使用一個或兩個多用途電源，則可以提供電源冗余。這需要使用兩倍于滿足系統負載要求所需的最小數量的多用途電源。
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.
