ALSTOM NRD108033 8RDC44667G01 SA44667.C PLC系統備件
1.產(chǎn) 品 資 料 介 紹：
中文資料：
如果您的ALSTOM NRD108033 8RDC44667G01 SA44667.C配備了SRAM備用電池，當主板電源出現故障時(shí)，DS1210S會(huì )選擇電壓最高的電源。如果一個(gè)源發(fā)生故障，DS1210S將切換到冗余源。
每次板通電時(shí)，DS1210S都會(huì )檢查電源，使軟件能夠提供早期警告以避免數據丟失：? 如果備份源的電壓小于2伏，則第二存儲器訪(fǎng)問(wèn)周期被阻止。? 因為DS1210S可能會(huì )阻止第二次訪(fǎng)問(wèn)，所以軟件在依賴(lài)數據之前應該至少進(jìn)行兩次訪(fǎng)問(wèn)。
通過(guò)可選的備用電池，ALSTOM NRD108033 8RDC44667G01 SA44667.C提供跳線(xiàn)（請參閱第3-11頁(yè)的可選SRAM備用電源選擇標題J6），允許DS1210S的電源連接到VMEbus+5V STDBY引腳或板載電池的一個(gè)電池。
電池的電源線(xiàn)暴露在電路板的焊接側，因此，除非電池已取出，否則電路板不應放置在導電表面或存放在導電袋中。ALSTOM NRD108033 8RDC44667G01 SA44667.C
英文資料：
If your ALSTOM NRD108033 8RDC44667G01 SA44667.C is equipped with SRAM battery backup, when the main board power fails, the DS1210S selects the source with the highest voltage. If one source should fail, the DS1210S switches to the redundant source.
Each time the board is powered, the DS1210S checks power sources, allowing software to provide an early warning to avoid data loss: ? If the voltage of the backup sources is less than two volts, the second memory access cycle is blocked. ? Because the DS1210S may block the second access, the software should do at least two accesses before relying on the data.
With the optional battery backup, the ALSTOM NRD108033 8RDC44667G01 SA44667.C provides jumpers (see Optional SRAM Backup Power Source Select Header J6 on page 3-11) that allow either power source of the DS1210S to be connected to the VMEbus +5 V STDBY pin or to one cell of the onboard battery.
The power leads from the battery are exposed on the solder side of the board, therefore the board should not be placed on a conductive surface or stored in a conductive bag unless the battery is removed.
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