REXROTH LT304 力士乐伺服放大器单元 具有处理速度和存储能力
伺服放大器单元是积分式电动执行机构（如DKJ、DK乙等）实现比例式控制必不可少的组成部分。
它作为基本伺服放大器单元，输入模拟量（DC4~20mA）信号通道1个，阀位反馈模拟量信号通道1个，输出电动机正、反动作的开关量触点（固态继电器或继电器触点）2个
The servo amplifier unit is an essential part of the integral electric actuator (such as DKJ, DK-B, etc.) to achieve proportional control.
As a basic servo amplifier unit, it has 1 input analog signal channel (DC4~20mA), 1 valve feedback analog signal channel, and 2 output switching contacts (solid state relay or relay contacts) of positive and negative motor action
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