HITACHI LPA302A输入输出模块
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电隔离是的，过电压类别II额定绝缘电压50 V绝缘测试电压500 V a.c.1分钟标称电压24 V电压限值（UL=逻辑0，UH=逻辑1）-30 V<UL<5 V 15 V<UH<30 V标称电流12 mA电流限值-22 mA<IL<2 mA 6 mA<IH<18 mA输入阻抗1.8 kOhm高完整性控制器能够使用SM811运行SIL3应用程序。执行热插拔或将附加/替换SM811插入正在运行的系统会影响SIL3应用程序。应配置模块以便进行同步。当运行SIL3应用程序时，用户必须接受同步的开始，以配置插入的模块。如果一个或多个SIL3应用程序正在控制器中运行，则它们被临时中断，以便使应用程序的状态与新插入的SM811一致。用户必须通过在已经运行的主安全模块上的数字输入3上创建边缘来确认应用程序停止。
Electric isolation Yes Overvoltage category II Rated insulation voltage 50 V Insulation test voltage 500 V a.c. 1 min Nominal voltage 24 V Voltage limits (UL = logic 0, UH = logic 1) - 30 V < UL < 5 V 15 V < UH < 30 V Nominal current 12 mA Current limits - 22 mA < IL < 2 mA 6 mA < IH < 18 mA Input impedance 1.8 kOhm The High Integrity controller is able to run SIL3 applications using SM811. Performing a Hot swap or inserting an additional/replacement SM811 into a running system affects SIL3 applications. The Module should be configured in order to get synchronized. When running SIL3 applications, the start of the synchronization must be accepted by the user, to configure the inserted module. If one or more SIL3 applications are running in the controller, they are temporarily interrupted in order to get a consistent state of the application to the newly inserted SM811. The user must acknowledge the application stop by creating a edge on digital input 3 on the primary, already running, Safety Module.
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