（1）输入继电器（X） 输入继电器(Input Relay)占用00～04CH，共5个通道(Channel)，每 个通道有16个继电器00～15。输入继电器编号为0000～0415，共80 点。
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它是包含有转动盘、继电器、步进器和荆齿的复杂设计，它能将键盘输入任意加密解密。
It had a complex design consisting of rotors, electric relays, steppers and ratchets, which would translate the whatever was typed on its keyboard into or out of code.
大多数开关主机都可通过触发输入进行外部触发，并且在继电器触点稳定之后可输出一个触发脉冲。
Most switch mainframes can be triggered externally via the trigger input and can send an output trigger pulse when the relay contacts have settled.
如果负载电阻被直接连接到伏特计的输入端子，通过继电器触点的电流会产生电压降，测得的电池电压将存在误差。
If the load resistor was connected directly across the voltmeter input terminals, the current through the relay contacts would cause a voltage drop and the measured cell voltage would be in error.
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