可編程邏輯控制器(PLC)系統(tǒng)利用各種類型的傳感器和反饋機(jī)制， 通過收集、存儲(chǔ)和分析數(shù)據(jù)，監(jiān)測并控制機(jī)器或系統(tǒng)的相互影響。采集傳感器數(shù)據(jù)會(huì)涉及對(duì)電壓和電流等模擬變量的精密測量和處理，這要求傳感器能夠經(jīng)常感應(yīng)到非常小的變化。精度、漂移、噪聲抑制和處理速度等都是這些系統(tǒng)的極重要特征。
ADI公司目前提供的PLC評(píng)估板是一種完整的工業(yè)過程控制演示系統(tǒng)，它具有四個(gè)隔離輸入通道、一個(gè)帶有RS-232接口的微處理器以及四個(gè)隔離輸出通道。在25°C時(shí)，系統(tǒng)總精度為0.05%。輸入通道具有24位分辨率(用AD8220儀表放大器和AD7793 Σ-Δ ADC)； 經(jīng)過配置，每個(gè)通道均能配置為接受各種輸入信號(hào): 從4 mA ~ 20 mA電流環(huán)路到0 V ~ 5 V、0 V ~ 10 V、±5 V、±10 V的高壓輸入。它還能處理低電平輸入，如來自RTD/熱電偶傳感器的輸入等。輸出模塊具有16位分辨率(AD5422)，集成輸出驅(qū)動(dòng)器，并內(nèi)置故障檢測和保護(hù)功能。AD5422的可編程輸出范圍如下: 4 mA ~ 20 mA、0 V ~ 5 V、0 V ~ 10 V、±5 V、±10 V。每種范圍均具有16位分辨率。完整設(shè)計(jì)采用ADI隔離技術(shù)、隔離的RS-232、處理器和電源管理產(chǎn)品，方便客戶評(píng)估完整的信號(hào)鏈。
PLC評(píng)估板特性
可選輸入: 0 mA ~ 20 mA、 4 mA ~ 20 mA、0 V ~ 5 V、 0 V ~ 10 V、 ±5 V、 ±10 V、 RTD、 TC
可編程輸出: 0 mA ~ 20 mA、4 mA ~ 20 mA、0 V ~ 5 V、0 V ~ 10 V、±5 V、±10 V
4個(gè)隔離的24位模擬輸入通道:
? AD7793: 24位Σ-Δ ADC，40 nV噪聲
? ADR02: 5 V精密基準(zhǔn)電壓源
? AD8220: 儀表放大器，>80 dB CMRR
? ADuM5401: 集成isoPower?的隔離式DC-DC轉(zhuǎn)換器， 500 mW輸出功率
4個(gè)隔離的16位模擬輸出通道:
? AD5422: 單通道、 16位、 串行輸入、 內(nèi)置電流源、 電壓輸出DAC
? 總非調(diào)整誤差(TUE): 0.01%(典型值25°C)
? 單芯片解決方案
? 開路檢測與保護(hù)電源/接口/控制
? ADuC7027: 采用ARM7? 內(nèi)核的模擬MCU
? ADP3339: 高精度、 超低IQ、 LDO
? ADM3251E: 隔離式單通道RS-232線路驅(qū)動(dòng)器/接收機(jī)
進(jìn)一步了解設(shè)計(jì)人員如何利用ADI公司極具突破性的制造工藝， 滿足最嚴(yán)苛的PLC系統(tǒng)應(yīng)用要求:
iCMOS?工藝技術(shù)結(jié)合高壓硅工藝與亞微米CMOS和互補(bǔ)雙極性技術(shù)， 使模擬IC能夠在30 V電壓下工作， 并具有更小的尺寸、 更高的性能和更低的成本： iCMOS?隔離技術(shù)基于芯片級(jí)變壓器， 而非LED和光電二極管， 可以與CMOS半導(dǎo)體功能相集成， 實(shí)現(xiàn)低成本隔離:www.analog.com/iCouplerPCI-5B39-04 Block 0-20mA current-output, ±5V b signal conditioning block. A-B 1756L55M24 模塊
PCI-5B39-05 Block 0-20mA current-output, 0-20mA b signal conditioning block.
PCI-5B39-07 Block ±20mA current-output, ±10V b signal conditioning block.
PCI-5B40-01 Block ±10mV wide-band voltage-b, ±5V output signal conditioning block.
PCI-5B40-02 Block ±50mV wide-band voltage-b, ±5V output signal conditioning block.
PCI-5B40-03 Block ±100mV wide-band voltage-b, ±5V output signal conditioning block.
PCI-5B40-04 Block ±10mV wide-band voltage-b, 0-5V output signal conditioning block.
PCI-5B40-05 Block ±50mV wide-band voltage-b, 0-5V output signal conditioning block.
PCI-5B40-06 Block ±100mV wide-band voltage-b, 0-5V output signal conditioning block.
PCI-5B41-01 Block ±1V wide-band A-B 1756L55M24 模塊 voltage-b, ±5V output signal conditioning block.
PCI-5B41-02 Block ±5V wide-band voltage-b, ±5V output signal conditioning block.
PCI-5B41-03 Block ±10V wide-band voltage-b, ±5V output signal conditioning block.
PCI-5B41-04 Block ±1V wide-band voltage-b, 0-5V output signal conditioning block.
PCI-5B41-05 Block ±5V wide-band voltage-b, 0-5V output signal conditioning block.
PCI-5B41-06 Block ±10V wide-band voltage-b, 0-5V output signal conditioning block.
PCI-5B41-07 Block ±20V wide-band voltage-b, ±5V output signal conditioning block.
PCI-5B41-08 Block ±20V wide-band voltage-b, 0-5V output signal conditioning block.
PCI-5B41-09 Block ±40V wide-band voltage-b, ±5V output signal conditioning block.
PCI-5B41-10 Block ±40V wide-band voltage-b, 0-5V output signal conditioning block.
PCI-5B42-01 Block 2-wire transmitter interface signal conditioning block.
PCI-5B42-02 Block 2-wire transmitter interface signal conditioning block.
PCI-5B45-01A Block 0-500Hz frequency-b signal conditioning block.
PCI-5B45-02A Block 0-1kHz frequency-b signal conditioning block.
PCI-5B45-03A Block 0-3kHz frequency-b signal conditioning block.
PCI-5B45-04A Block 0-5kHz frequency-b signal conditioning block.
PCI-5B45-05A Block 0-10kHz A-B 1756L55M24 模塊 frequency-b signal conditioning block.
PCI-5B45-06A Block 0-25kHz frequency-b signal conditioning block.
PCI-5B45-07A Block 0-50kHz frequency-b signal conditioning block.
PCI-5B45-08A Block 0-100kHz frequency-b signal conditioning block.
PCI-5B45-09A Block 0-250kHz frequency-b signal conditioning block.
PCI-5B47B-11 Block Type B linearized (500 to 1800 C) thermocouple-b signal conditioning block.
PCI-5B47J-01 Block Type J linearized (0 to 760 C) thermocouple-b signal conditioning block.
PCI-5B47J-02 Block Type J linearized (-100 to 300 C) thermocouple-b signal conditioning block.
PCI-5B47J-03 Block Type J linearized (0 to 500 C) thermocouple-b signal conditioning block.
PCI-5B47K-04 Block Type K linearized A-B 1756L55M24 模塊 (0 to 1000 C) thermocouple-b signal conditioning block.
PCI-5B47K-05 Block Type K linearized (0 to 500 C) thermocouple-b signal conditioning block.
PCI-5B47K-13 Block Type K linearized (-100 to 1350 C) thermocouple-b signal conditioning block.
PCI-5B47K-14 Block Type K linearized (0 to 1200 C) thermocouple-b signal conditioning block.
PCI-5B47K-15 Block Type N linearized (-100 to 1300 C) thermocouple-b signal conditioning block.
PCI-5B47R-09 Block Type R linearized (500 to 1750 C) thermocouple-b signal conditioning block.
PCI-5B47S-10 Block Type S linearized (500 to 1750 C) thermocouple-b signal conditioning block.
PCI-5B47T-06 Block Type T linearized (-100 to 400 C) thermocouple-b signal conditioning
