描述
PLC内部输入电路作用是将PLC外部电路（如行程开关、按钮、传感器等）提供的符合PLC输入电路要求的电压信号，通过光电耦合电路送至PLC内部电路。输入电路通常以光电隔离和阻容滤波的方式提高抗干扰能力，输入响应时间一般在0.1~15ms之间。根据输入信号形式的不同，可分为模拟量I/O单元、数字量I/O单元两大类。根据输入单元形式的不同，可分为基本I/O单元、扩展I/O单元两大类。
One-day shipping available
RELIANCE ELECTRIC DC MOTOR DRIVE 85014-29RA 0-51486-15A
RELIANCE ELECTROCRAFT SERVO CONTROLLER MMI PN 9078-0120
Reliance Electric 57C421A/57C-421A / 57C421
One-day shipping available
2 NEW RELIANCE ELECTRIC OLVC MAXPAK PC CARD 0-52808-2
VERY NICE RELIANCE 40 HP AC INDUSTRIAL MOTOR X306536A1
Reliance Electric 45C-15/45C15 Controller
One-day shipping available
Reliance Electric 57412-D/57412D/57412/0-57412-D
One-day shipping available
Reliance Electric 45C-202/45C202
One-day shipping available
Reliance Electric 0-57210-20 DC1 Control Board NEW
