點擊圖片查看大圖PLC機型選擇的基本原則是：在功能滿足要求的前提下，選擇可靠、維護使用方便以及性能價格比優(yōu)的機型。通常做法是，在工藝過程比較固定、環(huán)境條件較好的場合，建議選用整體式結(jié)構(gòu)的PLC；其他情況則選用模塊式結(jié)構(gòu)的 PLC；對于開關(guān)量控制以及以開關(guān)量控制為主、帶少量模擬量控制的工程項目中，一般其控制速度無須考慮，因此，選用帶 A/D轉(zhuǎn)換、D/A轉(zhuǎn)換、加減運算、數(shù)據(jù)傳送功能的低檔機就能滿足要求；而在控制比較復(fù)雜，控制功能要求比較高的工程項目中（如要實現(xiàn)PID運算、閉環(huán)控制、通信聯(lián)網(wǎng)等），可視控制規(guī)模及復(fù)雜程度來選用中檔或機（其中機主要用于大規(guī)模過程控制、全PLC的分布式控制系統(tǒng)以及整個工廠的自動化等）。根據(jù)不同的應(yīng)用對象，表1列出了PLC的幾種功能選擇。
瘋狂低價甩賣
HP/Agilent 85990A Multicarrier Signal Generator, 5 to 1100MHz, 75 ohm
Tektronix ADA400A, ADA-400A Tektronix ADA400A Differential Preamplifier
Boonton 952011 Kit Probe Kit
HP/Agilent 54001A Probe 1 GHz For 54100 Series
HP/Agilent 10430A 500MHz Probe
HP/Agilent 10434A 10:1, 1m Miniature Passive Probe
HP/Agilent 1144A 800MHZ Active Probe
HP/Agilent 1152A 2.5ghz,0.6pF Active Probe
HP/Agilent 11807A -100 HP 8920A/21A RF Communications System Support Test Software
HP/Agilent 11807B-044 HP 8921A/D RF Communications System Northern P Series Cell Site Test Software Option 044 Rev. B.01.20
HP/Agilent 11807B-H04 HP 8921A/D RF Communications System Northern Telecom DRU/TRU Test Software Option H04 Rev B.01.05
HP/Agilent 16089B Kelvin Clip Leads
HP/Agilent 41941A Impedance Probe Kit
HP/Agilent 44492A Reed Relay Multiplexer Assembly input Characteristics:
HP/Agilent 5060-3351 Option 760 PCA Relay for the 66100 series modules
HP/Agilent 54007A RF & Lightwave Accessory Kit
HP/Agilent 54701A 2.5-Ghz, 0.6-pF Active Probe
81001-410-52-R熱賣
81001-410-52-R熱賣
81001-410-52-R熱賣
HP/Agilent 81000VA Optical Interface ST Connector
HP/Agilent 85036B 75ohm type N Calibration Kit
HP/Agilent 85131D Semi-Rigid Cable Set, 3.5 mm to 3.5 mm
HP/Agilent 85620A Mass Memory Module
HP/Agilent 85702A 128K BYTE RAM Card
HP/Agilent 85902A Burst Carrier Trigger
HP/Agilent E4444A Bench
Tektronix 012-1221-00 2 Meter Cable For Sampling Heads
Tektronix 1101 Probe Power Supply
Tektronix 1101A Probe Power Supply
Tektronix 1102 Probe Power Supply
Tektronix K420 Tektronix K420 Oscilloscope Cart
Tektronix P6139A Tektronix P6139A 501 MHz, 10X Probe Accessories/Probes
Tektronix P6243 Tektronix P6243 Probe
Tektronix P6245 Tektronix P6245 1.5Ghz FET Probe
Wavetek 15271 Power Detector, 1MHz-26.5GHz
Wiltron 34RKNF50 Precision Ruggedized K (m) to N (f) Adapter, 20 GHz
WILTRON 560-97N50 VSWR AutoTester
Racal Instruments 11-1572 SENSING HEAD
HP/Agilent 85723A DECT Measurement personality card
General Microwave N436A 18GHz Peak Power Sensor sold only with GM 478A Meter
Anritsu MA2481A Universal Power Sensor, 10 MHz to 6 GHz, 50 Ohm, -60 to +20dBm
HP/Agilent 11612A Bias Network, 45 MHz to 26.5 GHz
HP/Agilent 16442A Test Fixture for use and sold only with the 4155 or 4156.
HP/Agilent 16014A Series Loss Test Adapter for the 4342A Q Meter
HP/Agilent 16048C Test Fixture with Alligator Clips
HP/Agilent 41800A Active Probe, 5Hz to 500MHz
HP/Agilent 11590A Bias Network, 1 to 12.4 GHz
HP/Agilent 16475A Inductor
HP/Agilent 346A 18GHz Noise Source with Type N
Rohde & Schwarz NRT-Z3, NRTZ3 RS232 Interface Adapter
HP/Agilent 54650A HP-IB Interface Module
HP/Agilent E1779A Snap On Battery Pack
HP/Agilent 81000AF Optical Interface Connector
HP/Agilent A2636-6103 e1497/98A Video cable
HP/Agilent E1497-61601 e1497/98A SCSI cable
HP/Agilent 85901A AC Battery / Power Supply for HP Portable Spectrum Analyzers
Consultronics CSI12815-5 Attenuator control cable 11713A
HP/Agilent 346A-04 18GHz Noise Source with APC-7
Tektronix P6209 Tektronix P6209 Active Probe 4 GHz
Tektronix 012-1220-00 1 METER CABLE FOR SAMPLING HEADS
HP/Agilent 54006A 6GHz Passive Divider Probe
HP/Agilent E1454A Pattern I/O Pod
HP/Agilent 85727A GSM Multi-Band Measurement Personality
HP/Agilent 85718B NADC-TDMA Measurement Personality
HP/Agilent 85710A Digital Radio Personality Module
HP/Agilent E5901B Emulation Run Control Module
HP/Agilent E5900B/E3453B/E3497B Emulation Probe
Anritsu MA4601A Power Sensor, 100 kHz to 5.5GHz, -30 to 20dBm, N (m)
HP/Agilent 83440C 1300/1550 nM, DC-20GHz Lightwave Detector
Tektronix ORR24 Tektronix ORR24 Optical Test
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