RELIANCE UVZC3007數(shù)字交流伺服板
1.產(chǎn) 品 介 紹
品牌：RELIANCE
型號(hào)說明：RELIANCE UVZC3007數(shù)字交流伺服板
優(yōu)勢(shì)：供應(yīng)進(jìn)口原裝正品，專業(yè)停產(chǎn)配件。
公司主營(yíng)特點(diǎn)：主營(yíng)產(chǎn)品各種模塊/卡件，控制器，觸摸屏，伺服驅(qū)動(dòng)器。
2.產(chǎn) 品 詳 情 資 料：
RELIANCE UVZC3007當(dāng)主電源斷開時(shí)，電池向SRAM提供VCC。電池保護(hù)的最壞情況是200天。SRAM陣列沒有奇偶校驗(yàn)保護(hù)?？刂破鞯腟RAM電池備份功能由Dallas DS1210S提供。DS1210S支持主電源和輔助電源。RELIANCE UVZC3007當(dāng)主板電源故障時(shí)，DS1210S選擇具有最高電壓的電源。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，如果備用電源的電壓低于2伏，則會(huì)阻止第二個(gè)存儲(chǔ)周期。這允許軟件提供預(yù)警以避免數(shù)據(jù)丟失。因?yàn)镈S1210S可以阻止第二次訪問，所以軟件在依賴數(shù)據(jù)之前應(yīng)該至少進(jìn)行兩次訪問。控制器提供跳線（J20上），允許DS1210S的電源連接到VMEbus+5V STDBY引腳或板載電池的一個(gè)單元。例如，主要系統(tǒng)備用電源可以是連接到VMEbus+5V STDBY引腳的電池，次要電源可以是板載電池。如果系統(tǒng)電源出現(xiàn)故障或板從機(jī)箱中卸下，則板載電池將接管。有關(guān)跳線配置，請(qǐng)參閱第2章。RELIANCE UVZC3007
A battery supplies VCC to the SRAMs when main power is removed. The worst case elapsed time for battery protection is 200 days. The SRAM arrays are not parity protected. The controller’s SRAM battery backup function is provided by a Dallas DS1210S. The DS1210S supports primary and secondary power sources. When the main board power fails, RELIANCE UVZC3007the 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 and if the voltage of the backup sources is less than two volts, the second memory cycle is blocked. This allows software to provide an early warning to avoid data loss. Because the DS1210S may block the second access, the software should do at least two accesses before relying on the data. The controller provides jumpers (on J20) that allow either power source of the DS1210S to be connected to the VMEbus +5V STDBY pin or to one cell of the onboard battery. For example, the primary system backup source may be a battery connected to the VMEbus +5V STDBY pin and the secondary source may be the onboard battery. If the system source should fail or the board is removed from the chassis, the onboard battery takes over. Refer to Chapter 2 for the jumper configurations.RELIANCE UVZC3007
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