描述
某些输入信号不进入PLC系统中有些信号功能简单、涉及面窄，如图6中的手动按钮、过载保护的热继电器触点等，有时就没有必要作为PLC的输入，将它们设计在PLC外围的硬件电路中同样可以满足控制要求。如果外部硬件电路过于复杂，则应考虑仍将有关信号送入可编程序控制器，
Pacific Scientific SR3643-4593-7-56C DC Motor – Used
PACIFIC SCIENTIFIC Powermax P2HNSHS 1.8º Step Motor =
Pacific Scientific POWERMAX Motor Unipolar 1.8 step 5v
Pacific Scientific Servo Motor R63GENP-R2-NS-NV-00 Used
PACIFIC SCIENTIFIC R43HCNA-R2-NS-NV-00 SERVO MOTOR
NEW PACIFIC SCIENTIFIC STEPPING MOTOR H21NREC-LNN-NS-00
Pacific Scientific C0101.N4CH000NNNN DC Drive 10HP 460V
PACIFIC SCIENTIFIC P21NSHS-LNS-NS-02 STEPPER MOTOR NNB!
Pacific Scientific Powermax 1.8 Step Motor P22NRXB
PACIFIC SCIENTIFIC F45GENA-R2-NS-NV-00 SERVO MOTOR*RFB*
