PKS系列單相電壓電流變送器
變送器優(yōu)點(diǎn):
1、不易受寄生熱電偶和沿電線電阻壓降和溫漂的影響,傳輸線可用非常便宜的更細(xì)的雙絞線導(dǎo)線
2、在電流源輸出電阻足夠大時,經(jīng)磁場耦合感應(yīng)到導(dǎo)線環(huán)路內(nèi)的電壓,不會產(chǎn)生顯著影響,因?yàn)楦蓴_源引起的電流極小,一般利用雙絞線就能抵抗降低干擾;
3、電容性干擾會導(dǎo)致電阻有關(guān)誤差,對于4~20mA兩線制環(huán)路,電阻通常為250Ω(取樣Uout=1~5V)這個電阻小到不足以產(chǎn)生顯著誤差,因此,可以允許的電線長度比電壓遙測系統(tǒng)更長更遠(yuǎn);
4、各個單臺示讀裝置或記錄裝置可以在電線長度不等的不同通道間進(jìn)行換接,不因電線長度的不等造成精度的差異;
5、將4mA用于零電平,使判斷開路或傳感器損壞(0mA狀態(tài))十分方便。
6, 在兩線輸出口容易增設(shè)防浪涌和防雷器件,有利于安全防雷防爆。
DH4-20mA電量變送器變送器模塊是中科院方舟公司采用意法半導(dǎo)體(ST)ASIC芯片為實(shí)現(xiàn)無源交流隔離傳感器(互感原理)的兩線制電流遙測技術(shù)手段而定型生產(chǎn)的單片模塊產(chǎn)品。無源交流隔離傳感器(互感原理)輸入的電流電壓信號經(jīng)整流濾波和I/V轉(zhuǎn)換后輸出一個隨I1線性變化的直流電壓信號U2,U2作為浮地控制信號去控制該模塊輸出4~20mA的標(biāo)準(zhǔn)化電流環(huán)路,該模塊實(shí)現(xiàn)了無源交流隔離傳感器信號變換為兩根連接線路發(fā)送的呈線性比例的環(huán)路電流,接受器通過測量已知電阻RL兩端的壓降對環(huán)路電流進(jìn)行檢測
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PKS-U3112
PKS-U3113
PKS-U3114
PKS-U3121
PKS-U3122
PKS-U3123
PKS-U3124
PKS-U3211
PKS-U3212
PKS-U3213
PKS-U3214
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PKS-U3112
PKS-U3113
PKS-U3114
PKS-U3121
PKS-U3122
PKS-U3123
PKS-U3124
PKS-U3211
PKS-U3212
PKS-U3213
PKS-U3214
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PKS-U3312
PKS-U3313
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PKS-U3322
PKS-U3323
PKS-U3324
PKS-U3411
PKS-U3412
PKS-U3413
PKS-U3414
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PKS-U3522
PKS-U3523
PKS-U3524
PKS-U4111
PKS-U4112
PKS-U4113
PKS-U4114
PKS-U4121
PKS-U4122
PKS-U4123
PKS-U4124
PKS-U4211
PKS-U4212
PKS-U4213
PKS-U4214
PKS-U4221
PKS-U4222
PKS-U4223
PKS-U4224
PKS-U4311
PKS-U4312
PKS-U4313
PKS-U4314
PKS-U4321
PKS-U4322
PKS-U4323
PKS-U4324
PKS-U4411
PKS-U4412
PKS-U4413
PKS-U4414
PKS-U4421
PKS-U4422
PKS-U4423
PKS-U4424
PKS-U4511
PKS-U4512
PKS-U4513
PKS-U4514
PKS-U4521
PKS-U4522
PKS-U4523
PKS-U4524
PKS-U5111
PKS-U5112
PKS-U5113
PKS-U5114
PKS-U5121
PKS-U5122
PKS-U5123
PKS-U5124
PKS-U5211
PKS-U5212
PKS-U5213
PKS-U5214
PKS-U5221
PKS-U5222
PKS-U5223
PKS-U5224
PKS-U5311
PKS-U5312
PKS-U5313
PKS-U5314
PKS-U5321
PKS-U5322
PKS-U5323
PKS-U5324
PKS-U5411
PKS-U5412
PKS-U5413
PKS-U5414
PKS-U5421
PKS-U5422
PKS-U5423
PKS-U5424
PKS-U5511
PKS-U5512
PKS-U5513
PKS-U5514
PKS-U5521
PKS-U5522
PKS-U5523
PKS-U5524
PKS-U6111
PKS-U6112
PKS-U6113
PKS-U6114
PKS-U6121
PKS-U6122
PKS-U6123
PKS-U6124
PKS-U6211
PKS-U6212
PKS-U6213
PKS-U6214
PKS-U6221
PKS-U6222
PKS-U6223
PKS-U6224
PKS-U6311
PKS-U6312
PKS-U6313
PKS-U6314
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PKS-U6323
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PKS-U6412
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