描述
电流经24V电源的正极(24V端子)、外部的触点或晶体管、X0等输入端子、内部电路和S/S端子，从0V端子流回24V电源的负极，使光耦合器中的发光二极管亮，光敏三极管饱和导通。
输入电路中设有RC滤波电路，以防止由于输入触点抖动或外部干扰脉冲引起错误的输入信号。滤波电路延迟时间的典型值为10～20ms(信号上升沿)和20～50ms(信号下降沿)，输入电流约5～10mA.
Nortel Meridian NT7D15AB OPTION 21A SYSTEM MONITOR
Allen Bradley 871Z-BW10N30-R3 Proximity Sensor NEW
ADC Kentrox CellSmart 200 10001 10300 10311 10206 10304
Allen Bradley 1771HD 91657701 Handheld Programmer
Allen Bradley 871P-BW25N40-R3 Proximity Sensor NEW
Lot of 2 Apollo Plain Paper Copir Transparency PP100C
Allen Bradley Industrial Terminal Monitor Bulletin 1770
Astro-Med MT95K2 Thermal Chart Recorder w/ Accesories
Transition Networks Media Converter F-SM-MM-02 1300nm
BMI 4800 Powerscope Line Disturbance Analyzer w/ Probes
Nortel Meridian PDU NT8D53BB Power Distribution Unit AC
Pelco VA6104 4-Pos Sequential Camera Video Switcher
