如果(guo)SMC電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)閥(fa)(fa)(fa)(fa)(fa)(fa)是(shi)(shi)有(you)插(cha)(cha)頭(tou)/插(cha)(cha)座(zuo)的(de)(de)(de)那種(zhong)，有(you)可能出(chu)現插(cha)(cha)座(zuo)的(de)(de)(de)金屬(shu)簧pian問題(ti)、插(cha)(cha)頭(tou)上(shang)接線(xian)(xian)的(de)(de)(de)問題(ti)等(deng)原因無法將(jiang)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)送到電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)引導(dao)(dao)閥(fa)(fa)(fa)(fa)(fa)(fa)（俗稱線(xian)(xian)圈）中。養成一個(ge)習(xi)慣：插(cha)(cha)頭(tou)插(cha)(cha)在插(cha)(cha)座(zuo)上(shang)之(zhi)后(hou)把(ba)固定螺絲(si)擰(ning)上(shang)，電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)引導(dao)(dao)閥(fa)(fa)(fa)(fa)(fa)(fa)（俗稱線(xian)(xian)圈）上(shang)在閥(fa)(fa)(fa)(fa)(fa)(fa)芯(xin)桿之(zhi)后(hou)把(ba)固定螺母擰(ning)上(shang)。如果(guo)SMC電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)閥(fa)(fa)(fa)(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)引導(dao)(dao)閥(fa)(fa)(fa)(fa)(fa)(fa)（俗稱線(xian)(xian)圈）的(de)(de)(de)插(cha)(cha)頭(tou)配備有(you)發(fa)光(guang)二極管電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)指(zhi)示(shi)燈(deng)(deng)(deng)，那么采用DC電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)驅動SMC電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)閥(fa)(fa)(fa)(fa)(fa)(fa)時即(ji)行就要接對，否則指(zhi)示(shi)燈(deng)(deng)(deng)不會亮。另外，不要將(jiang)不同電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)等(deng)級(ji)的(de)(de)(de)帶(dai)(dai)發(fa)光(guang)二級(ji)管電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)指(zhi)示(shi)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)插(cha)(cha)頭(tou)調換(huan)(huan)使(shi)用，這樣(yang)會導(dao)(dao)致發(fa)光(guang)二極管被(bei)燒毀(hui)/電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)（換(huan)(huan)用低電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)等(deng)級(ji)的(de)(de)(de)插(cha)(cha)頭(tou)）出(chu)現短路或(huo)發(fa)光(guang)二極管發(fa)光(guang)很微弱（換(huan)(huan)用高電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)等(deng)級(ji)的(de)(de)(de)插(cha)(cha)頭(tou)）。如果(guo)不帶(dai)(dai)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)指(zhi)示(shi)燈(deng)(deng)(deng)，SMC電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)閥(fa)(fa)(fa)(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)引導(dao)(dao)閥(fa)(fa)(fa)(fa)(fa)(fa)（俗稱線(xian)(xian)圈）是(shi)(shi)不用區分極性的(de)(de)(de)（不象電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)引導(dao)(dao)閥(fa)(fa)(fa)(fa)(fa)(fa)（俗稱線(xian)(xian)圈）電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)為直(zhi)流的(de)(de)(de)晶體管時間(jian)繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)以(yi)及電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)引導(dao)(dao)閥(fa)(fa)(fa)(fa)(fa)(fa)（俗稱線(xian)(xian)圈）上(shang)并聯有(you)二極管/電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)泄漏回路的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)引導(dao)(dao)閥(fa)(fa)(fa)(fa)(fa)(fa)（俗稱線(xian)(xian)圈）電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)為直(zhi)流的(de)(de)(de)中間(jian)繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)，需要區分極性）。處(chu)理(li)方法：修正接線(xian)(xian)錯誤、修復或(huo)更換(huan)(huan)插(cha)(cha)頭(tou)、插(cha)(cha)座(zuo)。