Description
输入电路是PLC接受开关量、模拟量等输入信号的端口,其元器件质量的优劣、接线方式及是否牢靠也是影响控制系统可靠性的重要因素。以开关量输入为例,按钮、行程开关的触点接触要保持在良好状态,接线要牢固可靠。机械限位开关是容易产生故障的元件
MODICON AS-B872-200 MODULE REPAIRED ASB872200
ALLEN BRADLEY 505-TOD NEW 505TOD
INGERSOL RAND NEW 1/2″ DIAPHRAM PUMP 660053-244
MODICON AS-B872-200 MODULE REPAIRED ASB872200
ALLEN BRADLEY 505-TOD NEW 505TOD
HONEYWELL T991B 1029 THERMAL SWITCH NEW T991B1029
GENERAL ELECTRIC 5KCP39SG-L139BS 1/2 HP MOTOR NEW
HONEYWELL T991B 1029 THERMAL SWITCH NEW T991B1029