140CPU67160

140CPU67160

3.2用于模拟量控制

模拟量，如电流、电压、温度、压力等等，它的大小是连续变化的。工业生产，特别是连续型生产过程，常要对这些物理量进行控制。

作为一种工业控制电子装置，PLC若不能对这些量进行控制，那是一大不足。为此，各PLC厂家都在这方面进行大量的开发。目前，不仅大型、中型机可以进行模拟量控制，就是小型机，也能进行这样的控制。

PLC进行模拟量控制，要配置有模拟量与数字量相互转换的A／D、D／A单元。它也是I/O单元，不过是特殊的I/O单元。

A/D单元是把外电路的模拟量，转换成数字量，然后送入PLC。D/A单元，是把PLC的数字量转换成模拟量，再送给外电路。

现货，现货，降降降，火火火，火火火……

现货，现货，降降降，火火火，火火火……

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Adtech SX-12

Tektronix 11402-2D-4D

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Colby Instruments PG-5000A

Dicon PM-1x8-13/16-9-FC

JDS Uniphase 5500S

Tektronix VX4330

Tektronix 2432

JDS Uniphase 5500L (5500L-1.30-LSAC-STD)

TAS 240

Tektronix OCP5002

JDS Uniphase 5500L (5500L-1.30-STD-LBR)

California Instruments 846CM

Adtech SX13-T1

epath Industries TPI108/109RT

ROD-L M100AVS5-5.0-25

Spirent SX7411, SX-7411

CDS 73A-357

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ROD-L M100DC

Kepco BOP72-1.5M

Tektronix 11402-2D

Elgar 501C

JDS Uniphase 5500L

JDS Uniphase 5500L (5500L-1.30-LS2C-STD)

Weinschel AS-4-kit

Pickering 10-780-524

Consultronics XPS-26

3H Industries SW2-20

Lambda-EMI TCR20S30-1-D

HP/Agilent 37717C-OYH-120-131-A3D-A3K-A3N-UH4-UKN

HP/Agilent 16751A

Chroma 2225

Tektronix 1725

HP/Agilent 37900D-01-02-03

HP/Agilent 3336B

Blue M B1-9E-F Enviromental Chamber/Oven

HP/Agilent 86100C-001-092-200

HP/Agilent E4433B

HP/Agilent E4200B

HP/Agilent 85027B

Solartron-Schlumberger 7071

TTC/Acterna 224-12041-12042-13466-42659-41502-41934-430...

PC Photon Control MD3 XYZ Controller

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Slaughter 2935

Keithley 7158

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HP/Agilent 11852B

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Tektronix 11A33

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Anritsu MS8609A-01-30-31, Installed Software MX860901A 

HP/Agilent 8753ET

ILX Lightwave FPM8210

Tektronix 7B50 Time Base 100 MHz

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HP/Agilent 6268B

HP/Agilent 8654B-03

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Stanford Research SR280

Exfo FOT-90A

HP/Agilent 6632A

Keithley 7166

Keithley 105

Keithley 107

Newport 4-Kinematic Stops and 2-Kinematic Nudgers

HP/Agilent 3499A

HP/Agilent E5503A

HP/Agilent J7230A-004,106,110,609

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HP/Agilent 85107A

HP/Agilent 8168F-021

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Logimetrics A610P

HP/Agilent N2101B-300

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Scientific Test 5000E

HP/Agilent N5309A-E08-EX2

HP/Agilent 83624A

Spirent 4500FLEX-2CH-6P

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HP/Agilent 0.008565