VARIAN 100010077-06 输入输出模块
最大信号返回屏障电阻和最大负载供应屏障电阻之和可使用以下公式确定。用户必须提供负载电压降、Vload和负载电流的值，Iload（最大20 mA）：Rbls+Rbrs=Vs-（Vload+Vbrs+0.4）Iload其中：Rbls=负载供应屏障电阻Rbrs=信号返回屏障电阻Vs=电压供应Vload=负载压降Vbrs=输出开关压降0.4=输出开关电压降（0.4V）Iload=负载电流（最大20mA）适用于I类1区危险场所的PNP输出应用，除电源屏障外，还必须选择A和B组信号返回屏障。有关参考，请参阅两个屏障PNP输出配置的控制图。信号返回屏障电阻和电源屏障电阻必须满足以下两个公式。用户必须提供Base Type Voltage Supply Cat的值。编号端子13…29.5V DC 42DTB-5500工作模式输出特性类别。No.Reflex NPN（电流吸收器）和PNP（电流源）42DRU-5500偏振反射42DRU-5700接近42DRP-5500光纤广角固定焦点42DRA-5500重要信息NPN和输出配置不允许用于I类1区A或B组的危险场所。罗克韦尔自动化出版物42DR-IN001B-EN-P-2016年5月5本质安全传感器-负载电压降Vload和负载电流Iload。请注意，在此配置中，Iload最大值为10 mA。Rbps=Vs-13 Rbps+Rbrs=Vs-（o.4+Vbrs+Vload）Iload+0.026 Iload+0.026其中：Rbps＝最大电源屏障电阻Rbrs＝最大信号返回屏障电阻Vs＝电源Vload＝负载电压降13＝最小。控制电源电压（13V）0.026=电源电流（13V时最大26mA）Iload=负载电流（最大10mA）Vbrs=信号返回屏障压降0.4=输出开关电压The sum of the maximum signal return barrier resistance and the maximum load supply barrier resistance can be determined using the following the formula. The user must provide values for the load voltage drop, Vload, and the load current, Iload (20 mA max): Rbls + Rbrs = Vs - (Vload + Vbrs + 0.4) Iload where: Rbls = Load Supply Barrier Resistance Rbrs = Signal Return Barrier Resistance Vs = Voltage Supply Vload = Load Voltage Drop Vbrs = Signal Return Barrier Voltage Drop 0.4 = Output Switch Voltage Drop (0.4V) Iload = Load Current (20mA max.) For PNP output applications in hazardous locations classified as Class I, Division 1, Groups A and B, signal return barrier must be selected in addition to the power supply barrier. For reference, see Control Drawing for the two barrier PNP output configurations. The signal return barrier resistance and the power supply barrier resistance must satisfy the following two formulas. The user must provide values for Base Type Voltage Supply Cat. No. Terminal 13…29.5V DC 42DTB-5500 Operating Mode Output Characteristics Cat. No. Reflex NPN (Current Sink) and PNP (Current Source) 42DRU- 5500 Polarized Reflex 42DRU- 5700 Proximity 42DRP- 5500 Fiber Optic Wide Angle Fixed Focus 42DRA- 5500 IMPORTANT The NPN and output configuration is not approved for use in hazardous locations classified as Class I, Division 1, Groups A or B. Rockwell Automation Publication 42DR-IN001B-EN-P - May 2016 5 Intrinsically Safe Sensor the load voltage drop, Vload, and the load current, Iload. Please note that Iload is 10 mA max in this configuration. Rbps = Vs - 13 Rbps + Rbrs = Vs - (o.4 + Vbrs + Vload) Iload + 0.026 Iload + 0.026 where: Rbps = Max. Power Supply Barrier Resistance Rbrs = Max. Signal Return Barrier Resistance Vs = Voltage Supply Vload = Load Voltage Drop 13 = Min. Voltage Supply to Control (13V) 0.026 = Supply Current (26mA max. at 13V) Iload = Load Current (10mA max.) Vbrs = Signal Return Barrier Voltage Drop 0.4 = Output Switch Voltage
