AID-1

当然也可以用单片机直接开发控制系统,但是对开发者要求相当高（不是一般水平可以胜任的）,开发周期长,成本高（对于一些大型一点的体统你需要做实验,印刷电路板就需要一笔相当的费用,你可以说你用仿真器,用实验板来开发,但是我要告诉你,那样做你只是验证了硬件与软件的可行性,并不代表可以用在工业控制系统,因为工业控制系统对抗干扰的要求非常高,稳定第一,而不是性能第一,所以你的电路板设计必须不断实验,改进）.当你解决了上述问题,你就发现你已经做了一台PLC了,当然如果需要别人能容易使用你还需要一套使用软件,这样你可以不需要把你的电路告诉别人（你也不可能告诉别人）.

       许多人觉得PLC很神秘，其实PLC是很简单的，其内部的CPU除了速度快之外，其他功能还不如普通的单片机。通常PLC采用16位或32位的CPU，带1或2个的串行通道与外界通讯，内部有一个定时器即可，若要提高可靠性再加一个看家狗定时器足够。

WESTINGHOUSE W200M2CFC non-reversing contactor size 2

WESTINGHOUSE A200M3CAC SIZE 3 MOTOR ConTROL STARTER,USE

WESTINGHOUSE B201K1CA B/200 ConTROL SIZE 1 CONTACTOR

WESTINGHOUSE AA43P THERMAL OVERLOAD RELAY SIZE 4 NEW

WESTINGHOUSE ADVANTAGE SIZE 2 STARTER MCC BUCKET 70 AMP

WESTINGHOUSE ADVANTAGE SIZE 2 STARTER MCC BUCKET HMCP50

WESTINGHOUSE ADVANTAGE SIZE 2 STARTER MCC BUCKET 45 AMP

WESTINGHOUSE ADVANTAGE SIZE 1 STARTER MCC BUCKET 15 AMP

WESTINGHOUSE ADVANTAGE SIZE 1 STARTER MCC BUCKET 7 AMP

WESTINGHOUSE ADVANTAGE SIZE 1 STARTER MCC BUCKET HMCP03

WESTINGHOUSE ADVANTAGE SIZE 1 STARTER MCC BUCKET 30 AMP

WESTINGHOUSE SIZE 5 ConTACT KIT 477B477G05 STARTER

WESTINGHOUSE ADVANTAGE SIZE 1 STARTER MCC BUCKET 20 AMP

WESTINGHOUSE ADVANTAGE SIZE 2 STARTER MCC BUCKET 60 AMP

WESTINGHOUSE A200M3CX SIZE 3 STARTER STYLE 179C920G18

WESTINGHOUSE SIZE 3 STARTER MCC BUCKET 100 AMP HMCP100

Westinghouse Starter A200MACAC 765A837G01 Size 00

WESTINGHOUSE SIZE 3 STARTER MCC BUCKET 100 AMP HMCP100

Westinghouse A201KIAA AC Magnetic Contactor Size 1 NIB

Westinghouse S/S Safety Switch Enclosure Size 1 3-Phase

Westinghouse Safety Switch Enclosure Size 0 3-Phase

NEW Westinghouse BA13A Size 1 Thermal Overload Relay

Westinghouse GCA-530 Size 5 AC Control Contactor 3 Pole

Westinghouse B/200 Sz 00 1-Pole NO Contact Kit NIB B200

Westinghouse L-54 L54 Electrical Interconnect Sz 1 NIB

Westinghouse Size 3 Life Line Contactor Motor Starter

WESTINGHOUSE MOTOR STARTER SIZE 5

WESTINGHOUSE 52E7295 SIZE O ConTACTOR 48VDC COIL NNB

WESTINGHOUSE Contact Kit 373B331G18 SZ 00 3/4 Pole NEW

WESTINGHOUSE A200M2CAC SIZE 2 STARTER, USED

Westinghouse A210M0CAC Size 0 3 Phase Contactor

2 WESTINGHOUSE ConTACTOR STARTER SIZE 1 10 HP A201K1CA

Westinghouse A201H5CAZ1 Size 5 Contactor 3PH 300A 600V

Westinghouse A201K6CAZ1 Size 6 Contactor 3PH 600A 600V

Westinghouse 626B187G17 SIZE4 ConTACT KIT 3 POLE

Westinghouse Non-Reversing Starter Size 00 B200MACAC

Westinghouse Size 5 Wye-Delta Starter – Reman

Westinghouse Family Size Griddle NIB White

WESTINGHOUSE B-100 MANUAL MOTOR STARTER SIZE M-O

Westinghouse Size 3 Contactor 90 amp A201K3CA

Westinghouse A201K4CA Size 4 Starter

WESTINGHOUSE MODEL K A200M4CAC SIZE 4 MOTOR CONTROL

WESTINGHOUSE SIZE 5 ConTACT KIT 477B477G05 STARTER

1 NEW WESTINGHOUSE A200M1CACD SIZE 1 STARTER NIB

Westinghouse Size 2 Starter A200M 2CACM 120 Volt Coil

Westinghouse Size 2 Starter A200 with Interlock 33-3A

Westinghouse Size 2 A201 K2EA Starter 120 Volt Coil

Westinghouse A201K2CA Size 2 Contactor 3 PH 45A 25HP

Westinghouse Size 3 Starter A200M 3CX 480 Volt Coil

Westinghouse Size 00 Motor Starter, Cat# A200MACAC