HIEE300661R0001模块控制器
接通时间：每个电磁阀1.5 x 1.0 x 0.10=0.15 W然后将此结果乘以两个相同电磁阀的2：0.15 W x 2电磁阀=两个电磁阀的总功率0.30 W在本例中，16点模块上的其他14个输出点操作操作员面板上的指示灯。每个指示灯需要0.05安培的电流。7个指示灯100%亮起，7个预计40%亮起。PACSystems*RX3i系统手册附录GFK-2314T 2019年9月电缆屏蔽夹紧组件870 17.2.3.117离散输入模块的散热除了上述模块功率计算外，离散输入模块还需要对其输入电路进行另一次计算，因为输入电路耗散的功率来自单独的电源。该计算假设输送到这些模块的所有输入电路功率最终都作为热量消散。程序如下：▪ 在模块的规格表中，查找输入电流的值。▪ 对于直流输入模块，将输入电压乘以电流值乘以估计的接通时间百分比，得出该直流输入的平均功耗。▪ 仅对于交流输入模块，将输入电压乘以电流值乘以估计的接通时间百分比乘以0.10，得出该交流输入的平均功耗。对模块上的所有输入重复这些步骤，然后对背板中的所有离散输入模块重复这些步骤。示例：IC693MDL240 16点离散120 Vac输入模块的规格表提供了以下信息：额定电压下的输入电流：12 mA（典型值）将该值用于该模块的所有输入计算。在本例中，八个输入点用于开关，对于正常操作，开关在100%的时间内保持打开（闭合）。这些开关包括紧急停机、超温、润滑压力正常和类似开关。公式模块用于控制开启和泵启动按钮。在正常情况下，这些按钮每天只按一次，持续约一秒钟，时间刚好足以启动控制器和泵。因此，它们对我们的功率计算的影响可以忽略不计：两个输入的总功率为0.0瓦。对于16点模块的其余六个输入，估计它们将在平均20%的时间内打开。因此，对这6个输入进行以下计算：PACSystems*RX3i系统手册附录GFK-2314T 2019年9月电缆屏蔽夹紧组件871使用平均功耗=输入电压x输入电流（单位：安培）x接通时间百分比（以小数表示）：120 x.012获得总PLC散热。通常不需要包括模拟模块，因为它们的功耗值与总功耗相比可以忽略不计。PACSystems*RX3i系统手册附录GFK-2314T 2019年9月电缆屏蔽夹持组件872电缆屏蔽夹夹组件电缆屏蔽夹组件IC697ACC736包含在恶劣工业环境中为屏蔽电缆提供更高EMC抗扰度所需的部件。屏蔽接地由套件中的接地板和电缆夹提供。电缆屏蔽夹紧组件包包括：一个接地板六个电缆夹四个#6自攻螺钉（组件中包括六个电缆夹具）电缆夹
of on-time: 1.5 x 1.0 x 0.10 = 0.15 W per solenoid Then multiply this result by 2 for two identical solenoids: 0.15 W x 2 Solenoids = 0.30 W total for the two solenoids Also in this example, the other 14 output points on the 16-point module operate pilot lights on an operator’s panel. Each pilot light requires .05 Amps of current. Seven of the pilot lights are on 100% of the time and seven are on an estimated 40%. PACSystems* RX3i System Manual Appendix GFK-2314T Sept. 2019 Cable Shield Clamping Assembly 870 17.2.3.1.17 Heat Dissipation for Discrete Input Modules In addition to the module power calculations described above, a discrete input module requires another calculation for its input circuits, because the power dissipated by the input circuits comes from a separate power source. This calculation assumes that all input circuit power delivered to these modules is eventually dissipated as heat. The procedure is: ▪ In the specification table of the module, find the value for Input Current. ▪ For DC input modules, multiply the input voltage times the current value times the estimated percent of on-time to arrive at average power dissipation for that DC input. ▪ For AC input modules only, multiply the input voltage times the current value times the estimated percent of on-time times 0.10 to arrive at average power dissipation for that AC input. Repeat these steps for all inputs on the module, and then for all discrete input modules in the backplane. Example: The Specifications table for the IC693MDL240 16-Point Discrete 120 Vac Input Module gives the following information: Input Current: 12 mA (typical) at rated voltage Use this value for all of the input calculations for this module. In this example, eight of the input points are used for switches that, for normal operation, stay on (closed) 100% of the time. These include the Emergency Stop, Over Temperature, Lube Pressure OK, and similar switches. Use the formula module are for the Control On and Pump Start pushbuttons. Under normal conditions, these pushbuttons are only pressed once per day for about one second – just long enough to start up the control and pump. Therefore, their effect on our power calculation is negligible: 0.0 Watts total for two inputs For the remaining six inputs of the 16-point module, it is estimated that they will be on for an average of 20% of the time. So, the following calculation is made for these 6 inputs: PACSystems* RX3i System Manual Appendix GFK-2314T Sept. 2019 Cable Shield Clamping Assembly 871 Using the formula of Average Power Dissipation = Input Voltage x Input Current (in Amps) x Percent (expressed as a decimal) of on-time: 120 x .012 obtain total PLC heat dissipation. It is usually not necessary to include analog modules because their power dissipation values are negligible when compared with the total. PACSystems* RX3i System Manual Appendix GFK-2314T Sept. 2019 Cable Shield Clamping Assembly 872 Cable Shield Clamping Assembly Cable Shield Clamping Assembly, IC697ACC736, contains the parts necessary for providing higher EMC immunity for shielded cables in severe industrial environments. Shield grounding is provided by the ground plate and cable clamps in the kit. The Cable Shield Clamping Assembly package includes: One ground plate Six cable clamps Four #6 self-tapping screws (Six cable clamps included with assembly.) Cable Clamp
