插(cha)頭(tou)(tou)連接器(qi)(qi)（Sub-D 9極插(cha)頭(tou)(tou)連接器(qi)(qi)，母頭(tou)(tou)）和(he)(he)(he)連接器(qi)(qi)分(fen)配符合Profibus標準（EN50170）。僅提供(gong)強制信(xin)號和(he)(he)(he)線路終端電源(yuan)。電源(yuan)端子數據接地(di)（0V，引(yin)腳5）和(he)(he)(he)電壓+（+ 5V，引(yin)腳6）用(yong)(yong)于電纜(lan)終端的電源(yuan)，不得用(yong)(yong)于其他(ta)任何設備。Control-P（Pin 4）信(xin)號與中(zhong)繼(ji)器(qi)(qi)一起使(shi)用(yong)(yong)。 數據通過Rxd / Txd-P（Profibus→B / B'/ RS-485→非反相I / O）和(he)(he)(he)Rxd / TxD-N（Profibus→A / A'/ RS-485→倒(dao)置I / O）端子。

在Profibus網(wang)絡上準(zhun)(zhun)備總線布線是(shi)確保Profibus卡和(he)目標(biao)硬件之間可靠運行和(he)電(dian)(dian)磁(ci)兼容性（EMC）的重要因素(su)。如果完成以(yi)下電(dian)(dian)纜準(zhun)(zhun)備工(gong)作(zuo)，則只能保證目標(biao)硬件技(ji)術數據中指定的EMC值（抗擾度和(he)排放）。Profibus電(dian)(dian)纜（拓撲(pu)，電(dian)(dian)纜，連接器，終端）必(bi)須符(fu)合Profibus標(biao)準(zhun)(zhun)（EN50170）。

Profibus網絡使用屏蔽(bi)(bi)(bi)雙絞線電(dian)(dian)(dian)纜。編(bian)織屏蔽(bi)(bi)(bi)必須在(zai)每個(ge)總(zong)線站(zhan)處具有盡可(ke)能低(di)的(de)(de)(de)(de)屏蔽(bi)(bi)(bi)參(can)(can)考(kao)電(dian)(dian)(dian)位(wei)的(de)(de)(de)(de)阻抗。必須通(tong)過插頭外殼(ke)和(he)Sub-D插頭連(lian)(lian)接(jie)器(qi)的(de)(de)(de)(de)固定螺(luo)釘來實(shi)現電(dian)(dian)(dian)纜屏蔽(bi)(bi)(bi)和(he)屏蔽(bi)(bi)(bi)參(can)(can)考(kao)電(dian)(dian)(dian)位(wei)（Micro Panel這是金屬(shu)外殼(ke)）之(zhi)間的(de)(de)(de)(de)連(lian)(lian)接(jie)。各個(ge)總(zong)線站(zhan)的(de)(de)(de)(de)屏蔽(bi)(bi)(bi)參(can)(can)考(kao)電(dian)(dian)(dian)位(wei)通(tong)常與保護導(dao)體系(xi)統相連(lian)(lian)。因此(ci)，這可(ke)能導(dao)致電(dian)(dian)(dian)位(wei)差，這又可(ke)能導(dao)致沿著(zhu)電(dian)(dian)(dian)纜屏蔽(bi)(bi)(bi)的(de)(de)(de)(de)均衡(heng)電(dian)(dian)(dian)流。如果(guo)屏蔽(bi)(bi)(bi)參(can)(can)考(kao)電(dian)(dian)(dian)位(wei)之(zhi)間的(de)(de)(de)(de)電(dian)(dian)(dian)位(wei)差和(he)補償電(dian)(dian)(dian)流較高，則應提供電(dian)(dian)(dian)位(wei)均衡(heng)棒。