MA-0185-100
MA-0185-100
]MA-0185-100
从PLC控制系统与电器控制系统比较可知，PLC的用户程序（软件）代替了继电器控制电路（硬件）。因此，对于使用者来说，可以将PLC等效成是许许多多各种各样的“软继电器”和“软接线”的集合，而用户程序就是用“软接线”将“软继电器”及其“触点”按一定要求连接起来的“控制电路”。
为了更好的理解这种等效关系，下面通过一个例子来说明。如图1所示为三相异步电动机单向起动运行的电器控制系统。其中，由输入设备SB1、SB2、FR的触点构成系统的输入部分，由输出设备KM构成系统的输出部分。
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STI Light Curtain Tran***itter MS4340B-2
Fanuc Board A16B-1212-0300-08A
Fanuc Main CPU Board A16B-2200-0841
Fanuc PC Board A16B-2200-0854/03B
Festo Cylinder DNC-80-200-PPV-A-KP
Yaskawa JANCD-MCP01 PC Board
Allen Bradley Starter 509-EOA Series A
Kepco Power Supply CPS6-10M
Automation Direct PLC H2-WPLC2
Jewel Meter (Lot of 4) Model 368, 369 and 2 Unknown
Allen Bradley 1792D-8BIO8E Series B
Fanuc Pulsecoder A860-0360-V501
Fanuc Power Unit A16B-1310-0010-01
Telemecanique FIP Tap TSXFPAC***
Emerson Positioning Servo Drive PCM-11
Ham Industries Controller HS-4243
Lenze EPZ-10201 Extension Board 01
Balance Engineering BMDA-110 Board
Buhler Thermotronik Temperature Sensor 6/-GM-D A14120/0
Tru-Flo Solenoid Valve UT16-DA-F05
ABB IRB1400 Cable Entry Panel
Siemens 505-RTU Remote Terminal Module
STI Light Curtain Tran***itter 42687-0280
STI Light Curtain Tran***itter 42687-0440
STI Light Curtain Receiver 42672-0360
GE SPECTRA FUSIBLE SWITCH UNIT, 1200A, ADS36120LM
RELIANCE ELECTRIC DISTRIBUTED POWER MODULE 803612 RC
ABB DSQC 328 3HAB 7229-1
SIEMENS ITE BUSWAY PLUG UV366G 600 AMP 600 VOLT
CUTLER HAMMER TAP365G, 400 AMP, BUSS DUCT PLUG, TAP 365
FANUC LOGIC MASTER JUNIOR SOFTWARE IC641PTE321 VER 1.05
ITE 1600 AMP. HP3-F160 WITH HP3-T160
SIEMENS ITE BUSWAY PLUG UV366 600 AMP 600 VOLT
CUTLER HAMMER D720 DS90021SPAREIR
CUTLER HAMMER SIZE 5 CN155N3, SERIES A1
SQUARE D MHL36100031DC 1680, 1000 AMP BREAKER WITH CT
SIEMENS SERVO MOTOR 1FK7063-SAF71-1GGS
SIEMENS I.T.E 800 AMP XL-U BUSWAY, UH308CUPG
SQUARE D PANEL 600AMP FEED THRU RATED, 400 AMP MAIN
ALLEN BRADLEY. CENTERLINE 2100 MCC SIZE 3 REVERSING STA
SQUARE D, SIZE 6 LIGHTING CONTACTOR W/ NEMA 1 ENCLOSURE
ALLEN BRADLEY 6155R-14SXPH, 6155R14SXPH, VERS***IEW, WIN
FANUC A06B-6066-H003 SERVO AMPLIFIER
ABB 38SC 980 004 R574
SQUARE D CIRCUIT BREAKER MHL36600
A-B ADJUST FREQUENCY AC 3 PH MOTOR DRIVE 1305-BA04A-HA2
CUTLER HAMMER IDT A-B REMOTE LINK 1242, ZZ02H, 966801-0
ACROLOOP MOTION CONTROL I/O INTERCONNECT B D08432 ARC
Russellstoll ERSFH8414FCG 60a 480v POWER DISTRIBUTION
ELPRO SERIAL TELEMETRY MODULE, 105S-1, 900MHZ WIRELESS
SIEMENS SERVO MOTOR 1FK7063-SAF71-1TGO
ITE SIEMENS CIRCUIT BREAKER KM3 F800, 800 AMP
SIEMENS I.T.E 1600 AMP XL-U BUSWAY, UH316CUPG
SQUARE D CIRCUIT BREAKER MHL361000
SQUARE D MEC836LSI, 800 AMP BREAKER
ALLEN BRADLEY POWER FLEX SK-M1-CVR3-B4 SERIES A
SIEMENS I.T.E 2000 AMP XL-U BUSWAY, UH320CUPG
HORNER HE693DNT250K GE FANUC HE693DNT250
$899.99
ITE GOULD XL-UNIVERSAL BUS DUCT 90, U325***L-1
ITE GOULD XL-UNIVERSAL BUS DUCT 90 DEG
SQUARE D DISCONNECT HNF365, 400 AMP, 3 POLE, 600V
SIEMENS DISCONNECT HNF365, 400 AMP, 3 POLE, 600VAC. NEM
GENERAL PHOTONICS OPTICAL CABLE, TYPE OFNR 10F, 50/
ALLEN BRADLEY 1788-CN2DN A G01 DEVICENET CONTROLNET,
ALLEN BRADLEY 2100, SIZE 3 MCC STARTER ***ET
FANUC HIGH SPEED INPUT MODULE, EE-1063-300. REV A EE106
ALLEN BRADLEY 1794-IR8 3 WIRE RTD INPUT 8 CHANNEL
CUTLER HAMMER Westinghouse PIN-FB Blue Label Breaker Bu
PTI MEASUREMENT & CONTROL DUAL TEMPERATURE ***ERAGER
Westinghouse A201K4CA Size 4 Starter
HORNER HE190IBSRMUC GE FANUC HE190IBSRMUC
SQUARE D MOLDED CASE CIRCUIT BREAKER KHP36200 200 AMP
SIEMENS SIZE 3 COMBINATION STARTER CLASS SCF TYPE E15
GE CIRCUIT BREAKER 3P 600A 600V SGHA36AT0600
SQUARE D CIRCUIT BREAKER MAL36600, 600 AMP, 3 POLE, MAL
SQUARE D CIRCUIT BREAKER, LAL363001021, LAL36300, LAL
LIEBERT TVSS, LPM240D160
SQUARE D DISCONNECT HF364J, 200 AMP, 3 POLE, 600V
FESTO IFB8-03, VIGCP-03-FB, BUS NODE WITH VIGCP-03-FB
ALLEN BRADLEY 809-A03E INSTAN. TRIP CURRENT RELAY
GE AC361RGR1, AC361RG, BUSS PLUG, 30A, 3 WIRE W/
MOTORTRONICS, CSD-403-N VARIABLE FREQUENCY DRIVE
GENERAL PHOTONICS OPTICAL CABLE, TYPE OFNR 10F, 50/
ITE BD SWITCH PLUG BOS14323 BUSDUCT PLUG 100 AMP
SQUARE D CIRCUIT BREAKER KAP362001212 KAP36200 121
MERLIN GERIN CIRCUIT BREAKER FSJ400A 600 VOLT