描述
在输入采样阶段，可编程逻辑控制器以扫描方式依次地读入所有输入状态和数据，并将它们存入I/O映象区中的相应的单元内。输入采样结束后，转入用户程序执行和输出刷新阶段。在这两个阶段中，即使输入状态和数据发生变化，I/O映象区中的相应单元的状态和数据也不会改变。因此，如果输入是脉冲信号，则该脉冲信号的宽度必须大于一个扫描周期，才能保证在任何情况下，该输入均能被读入。
LINEAR STEPPER MOTOR . TWO STEP MOTORS INCLUDED
LINEAR VELOCITY TRANSDUCER 3.4 INCH STROKE DC VOLTAGE
DC HIGH TORQUE GEARED MOTOR . TRW GLOBE . 330 rpm NEW
BOURNS POTENTIOMETER 10K 3/4 TURN ( LOT OF 5) NEW
STERLING MAGNETIC CLUTCH BRAKE 24VDC 50 OZ-IN.TORQUE
API M232-04-C2 STEPPER STEP MOTOR DUAL SHAFT
BOURNS POTENTIOMETER 1K, 10 TURN DOUBLE SHAFT 5EA.
BARBER COLMAN GEARHEAD DC SERVO MOTOR EYQF-63604-740
BOWMAR SPEED REDUCER GEARHEAD RATIO:172.33:1 (SMALL)
BOWMAR SPEED REDUCER GEARHEAD RATIO:173.54:1 (SMALL)
DC POWER SUPPLY . 12 to 18 VDC . MODULAR SWITCHING
DC MOTOR GEARHEAD and ENCODER Mfg.by JAPAN SERVO
LAMBDA POWER SUPPLY LK362-FM 0-60VDC 0-25AMPS METERED
POTENTIOMETER 14 TURN 7.5K OHMS AND COUNTING DIAL
GEARED MOTOR GLOBE 28VDC OR 12VDC 27RPM 50 OZ-IN.
