rs-485標(biāo)準(zhǔn)采有用平衡式發(fā)送，差分式接收的數(shù)據(jù)收發(fā)器來(lái)驅(qū)動(dòng)總線，具體規(guī)格要求： 1. 接收器的輸入電阻rin≥12kΩ 2. 驅(qū)動(dòng)器能輸出±7v的共模電壓 3.輸入端的電容≤50pf 4. 在節(jié)點(diǎn)數(shù)為32個(gè)，配置了120Ω的終端電阻的情況下，驅(qū)動(dòng)器至少還能輸出電壓1.5v（終端電阻的大小與所用雙絞線的參數(shù)有關(guān)） 5.接收器的輸入靈敏度為200mv（即（v+）-（v-）≥0.2v，表示信號(hào)"0"；（v+）-（v-）≤-0.2v，表示信號(hào)"1"） 因?yàn)閞s-485的遠(yuǎn)距離、多節(jié)點(diǎn)（32個(gè)）以及傳輸線成本低的特性，使得eia rs-485成為工業(yè)應(yīng)用中數(shù)據(jù)傳輸?shù)氖走x標(biāo)準(zhǔn)。基于此，rs-485的自動(dòng)化領(lǐng)域的應(yīng)用非常廣泛，但是在實(shí)際工程中rs-485總線運(yùn)用仍然存在著很多問(wèn)題，影響了工程的質(zhì)量，為工程施工帶來(lái)了很多的不方便。
| 型號(hào) | ZR-SLRS22-2*1.5+2*0.75 | 報(bào)價(jià)熱線 | ||||
| ZR-SLRS22 | 1*2*0.2 | 5*2*2.5 | 10*2*1.5 | 3*3*1.0 | 8*3*0.75 | 0550-7305800 |
| ZR-SLRS22 | 1*2*0.3 | 6*2*0.2 | 10*2*2.5 | 3*3*1.5 | 8*3*1.0 | 0550-7305800 |
| ZR-SLRS22 | 1*2*0.5 | 6*2*0.3 | 11*2*0.2 | 3*3*2.5 | 8*3*1.5 | 0550-7305800 |
| ZR-SLRS22 | 1*2*0.75 | 6*2*0.5 | 11*2*0.3 | 4*3*0.2 | 8*3*2.5 | 0550-7305800 |
| ZR-SLRS22 | 1*2*1.0 | 6*2*0.75 | 11*2*0.5 | 4*3*0.3 | 9*3*0.2 | 0550-7305800 |
| ZR-SLRS22 | 1*2*1.5 | 6*2*1.0 | 11*2*0.75 | 4*3*0.5 | 9*3*0.3 | 0550-7305800 |
| ZR-SLRS22 | 1*2*2.5 | 6*2*1.5 | 11*2*1.0 | 4*3*0.75 | 9*3*0.5 | 0550-7305800 |
| ZR-SLRS22 | 2*2*0.2 | 6*2*2.5 | 11*2*1.5 | 4*3*1.0 | 9*3*0.75 | 0550-7305800 |
| ZR-SLRS22 | 2*2*0.3 | 7*2*0.2 | 11*2*2.5 | 4*3*1.5 | 9*3*1.0 | 0550-7305800 |
| ZR-SLRS22 | 2*2*0.5 | 7*2*0.3 | 12*2*0.2 | 4*3*2.5 | 9*3*1.5 | 0550-7305800 |
| ZR-SLRS22 | 2*2*0.75 | 7*2*0.5 | 12*2*0.3 | 5*3*0.2 | 9*3*2.5 | 0550-7305800 |
| ZR-SLRS22 | 2*2*1.0 | 7*2*0.75 | 12*2*0.5 | 5*3*0.3 | 10*3*0.2 | 0550-7305800 |
| ZR-SLRS22 | 2*2*1.5 | 7*2*1.0 | 12*2*0.75 | 5*3*0.5 | 10*3*0.3 | 0550-7305800 |
| ZR-SLRS22 | 2*2*2.5 | 7*2*1.5 | 12*2*1.0 | 5*3*0.75 | 10*3*0.5 | 0550-7305800 |
| ZR-SLRS22 | 3*2*0.2 | 7*2*2.5 | 12*2*1.5 | 5*3*1.0 | 10*3*0.75 | 0550-7305800 |
| ZR-SLRS22 | 3*2*0.3 | 8*2*0.2 | 12*2*2.5 | 5*3*1.5 | 10*3*1.0 | 0550-7305800 |
| ZR-SLRS22 | 3*2*0.5 | 8*2*0.3 | 1*3*0.2 | 5*3*2.5 | 10*3*1.5 | 0550-7305800 |
| ZR-SLRS22 | 3*2*0.75 | 8*2*0.5 | 1*3*0.3 | 6*3*0.2 | 10*3*2.5 | 0550-7305800 |
| ZR-SLRS22 | 3*2*1.0 | 8*2*0.75 | 1*3*0.5 | 6*3*0.3 | 11*3*0.2 | 0550-7305800 |
| ZR-SLRS22 | 3*2*1.5 | 8*2*1.0 | 1*3*0.75 | 6*3*0.5 | 11*3*0.3 | 0550-7305800 |
| ZR-SLRS22 | 3*2*2.5 | 8*2*1.5 | 1*3*1.0 | 6*3*0.75 | 11*3*0.5 | 0550-7305800 |
| ZR-SLRS22 | 4*2*0.2 | 8*2*2.5 | 1*3*1.5 | 6*3*1.0 | 11*3*0.75 | 0550-7305800 |
| ZR-SLRS22 | 4*2*0.3 | 9*2*0.2 | 1*3*2.5 | 6*3*1.5 | 11*3*1.0 | 0550-7305800 |
| ZR-SLRS22 | 4*2*0.5 | 9*2*0.3 | 2*3*0.2 | 6*3*2.5 | 11*3*1.5 | 0550-7305800 |
| ZR-SLRS22 | 4*2*0.75 | 9*2*0.5 | 2*3*0.3 | 7*3*0.2 | 11*3*2.5 | 0550-7305800 |
| ZR-SLRS22 | 4*2*1.0 | 9*2*0.75 | 2*3*0.5 | 7*3*0.3 | 12*3*0.2 | 0550-7305800 |
| ZR-SLRS22 | 4*2*1.5 | 9*2*1.0 | 2*3*0.75 | 7*3*0.5 | 12*3*0.3 | 0550-7305800 |
| ZR-SLRS22 | 4*2*2.5 | 9*2*1.5 | 2*3*1.0 | 7*3*0.75 | 12*3*0.5 | 0550-7305800 |
| ZR-SLRS22 | 5*2*0.2 | 9*2*2.5 | 2*3*1.5 | 7*3*1.0 | 12*3*0.75 | 0550-7305800 |
| ZR-SLRS22 | 5*2*0.3 | 10*2*0.2 | 2*3*2.5 | 7*3*1.5 | 12*3*1.0 | 0550-7305800 |
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