VMIVME-1128 VMIC

描述

FX2系列PLC的编程接口采用RS-422标准，而计算机的串行口采用RS-232标准。因此，作为实现PLC计算机通信的接口电路，必须将RS-422标准转换成RS-232标准。

RS-232与RS-422标准在信号的传送、逻辑电平均不相同。

RS-232采用单端接收器和单端发送器，只用一根信号线来传送信息，并且根据该信号线上电平相对于公共的信号地电平的大小来决定逻辑的“1”（-3～-15V）和“0”（+3～+15V）；

RS-422标准是一种以平衡方式传输的标准，即双端发送和双端接收，根据两条传输线之间的电位差值来决定逻辑状态。RS-422电路由发送器、平衡连接电缆、电缆终端负载和接收器组成。它通过平衡发送器和差动接收器将逻辑电平和电位差之间进行转换

选用MAXIM公司的MAX202实现RS-232与TTL之间的电平转换。MAX202内部有电压倍增电路和转换电路，仅需+5V电源就可工作，使用十分方便；选用MAX490实现RS-485与TTL之间的转换。每片MAX490有一对发送器/接收器，由于通信采用全双工方式，故需两片MAX490，另外只需外接4只电容即可。

(Q9-2)1 SMC CP95SDB63-50 CYLINDER 1.0 MPA MAX Q9-2

(4605)Allen Bradley Inductive Proximity Sensor 871P-BW

(X1-2)1 ALLEN BRADLEY 42SRF-6002 PHOTOSWITCH.X1-2

(X1-2)1 SQUARE D 9007 AW-32 PRECISION LIMIT SWITCH

(5235)Banner Sensor Bipolar Diffuse Laser 400mm 70230

(A5)1 Honeywell 1LN1-5-LH Micro Switch(A5)

(6423)Square D Limit Switch 9007C54GD 10A 600 V NIB

(5286)Norma Connect Coupling Stainless Steel G1-W4 E20

(5180)ZERO MAX CD Coupling 35mm Bore No KWY 1.625 Bore

(5182)ZERO MAX CD Coupling Spacer 35mm Bore No KWY 1.6

(6848)Numatics Precision Regulator 150 Psig 10 Bar Max

(6068)Fanuc Output Module IC693MDL930D 4A 8PT Relay Is

(5117)Allen Bradley Proximity Sensor 871P-E13GRT 40-13

(4706)Nice Set of 12 Brady Lockouts in Bag must see(

(8015)Allen Bradley Advanced Interface Converter/DH-

(6668)Phoenix Contact Remote I/O IBS-ST24-BK-M-T 8PT 2

(6671)Warner Electric Inductive Proximity Sensor 650-2

(8540)Allen Bradley Manual Reset Overload Relay 193-A1

(8126)Parker Inline Valve N3554904553 140 Psi NWOB(81

(U3)12 ALLEN BRADLEY 800T-XAR CONTACT BLOCKS.SERI

(8396)Allen Bradley Coil 4A11 440V 60Hz NWOB(8396)

(7446)Allen Bradley Cluster Pilot Light 800T-QC424 24V

Allen Bradley Gravity Return Limit Switch 802G-GP Nema

(5783)Lot of 2 Cutler Hammer Contact Kits 6-23-2 6-22-

(5710)Klockner Moeller Door Handle Switch TO-2-8900/EA

(5215)Schmersal Limit Switch MV9H 330-11Y-1366 250V(5

(8312)Cutler Hammer Push Button Assembly Maint.Red Mu

(5187)Turck Proximity Switch 26mm Probe Minifast BI2-C

(4979)Keyence Photoelectric Fiber Optic Diffuse FU-68

(Q2-1)1 GENERAL ELECTRIC CR1062R2B STARTER Q2-1

Allen Bradley Z-34040 Contact Kit 3 Pole NIB(4750)

(T2)3 BUSSMANN FRS-R-65 FUSES.T2.

(T6)7 CR INDUSTRIES 19640 OIL SEALS.T6.

(4522)Siemens Relay 8 Pole 3TH42 62-OAP6 6NO2NC 220/24

(O2-3)1 FASCO A090 DRAFT INDUCER MOTOR O2-3

(O3-3)1 TELEMECANIQUE GV2-ME14 STARTER MANUAL O3-3

(8853)Gast Gear Motor 1UP-NRV-4-GR11.45HP 6000RPM 15;

(X1-1)1 NIB HYDE PARK VM18-PP14000-Q SENSOR X1-1

(7631)Asco Solenoid Valve 8340A1 120V 1/4″(7631)

(7052)Norgren Filter F17-800-A3DA NIB(7052)

(6787)Asco Valve 8214G036 1/4″10.1W 110/50 120/60(67

(7696)Banner Valu Beam Receiver 25686 3M 10-30 VDC(76

(7705)Square D Circuit Breaker MG17467 3P 30A Trip Cur

(5387)Lantech PC Board 55004201 A/D 8BIT.045V Input

(A7)1 ALLEN BRADLEY CABLE,1394-GR04 GMC REC RESOLV

(Q4-3)1 HONEYWELL S89G-1021 IGNITON MODULE Q4-3