為什么(me)工控(kong)主(zhu)板(ban)(ban)(ban)的價格比商用主(zhu)板(ban)(ban)(ban)高?工控(kong)主(zhu)板(ban)(ban)(ban)相(xiang)對商用主(zhu)板(ban)(ban)(ban)好在哪?相(xiang)信很多用戶朋友(you)都有這個疑問(wen)，下面我(wo)們就(jiu)從主(zhu)板(ban)(ban)(ban)元器(qi)件的用料與設計方(fang)面分析下：
　　
　　商(shang)用(yong)主板(ban)：
　　
　　商(shang)用(yong)主板由于(yu)其更(geng)新換(huan)代的(de)(de)(de)速度比(bi)(bi)較(jiao)(jiao)快，且對(dui)產品(pin)的(de)(de)(de)穩定性及(ji)使(shi)(shi)(shi)用(yong)環境(jing)的(de)(de)(de)要求比(bi)(bi)較(jiao)(jiao)低，故(gu)此追(zhui)求的(de)(de)(de)是(shi)產品(pin)的(de)(de)(de)時效性，以(yi)及(ji)本身產品(pin)的(de)(de)(de)市(shi)(shi)場定位，對(dui)元(yuan)器件選擇要求上一般只(zhi)需(xu)滿足系統運行2到(dao)3年(nian)的(de)(de)(de)使(shi)(shi)(shi)用(yong)壽命即(ji)可(3年(nian)之后大部分已經更(geng)新換(huan)代了(le))，元(yuan)器件的(de)(de)(de)用(yong)料上使(shi)(shi)(shi)用(yong)普通(tong)級別的(de)(de)(de)就可以(yi)了(le)。例如電容，商(shang)用(yong)主板都是(shi)大量使(shi)(shi)(shi)用(yong)普通(tong)的(de)(de)(de)電解電容，一是(shi)出于(yu)商(shang)用(yong)市(shi)(shi)場產品(pin)的(de)(de)(de)使(shi)(shi)(shi)用(yong)考慮，二(er)是(shi)為降(jiang)低主板的(de)(de)(de)成本考慮。
　　
　　工(gong)控主板：
　　
　　1)工控主板的元器件
　　
　　工控主板選料會(hui)選用(yong)經(jing)過長時間，高(gao)要(yao)(yao)求(qiu)驗證(zheng)元器(qi)(qi)件(jian)，用(yong)以保證(zheng)產(chan)品(pin)在惡劣條件(jian)下高(gao)可靠性要(yao)(yao)求(qiu)。例(li)如(ru)工(gong)控主(zhu)板的(de)元器(qi)(qi)件(jian)需要(yao)(yao)適(shi)應寬溫環境(-20℃~60℃)，如(ru)固態電(dian)容器(qi)(qi)，保證(zheng)在惡劣環境下(壽命期內永久開機、氣候惡劣、潮(chao)濕、振動(dong)、多(duo)塵、輻射、高(gao)溫等(deng)(deng)等(deng)(deng))正常工(gong)作;主(zhu)板元器(qi)(qi)件(jian)需要(yao)(yao)耐高(gao)溫、抗潮(chao)濕等(deng)(deng)等(deng)(deng)。
　　
　　2)工控主板的電容
　　
　　工(gong)控主(zhu)(zhu)板(ban)(ban)采(cai)用(yong)的(de)(de)(de)(de)是(shi)(shi)高質量(liang)的(de)(de)(de)(de)貼(tie)片式(shi)的(de)(de)(de)(de)固(gu)(gu)態電(dian)(dian)容(rong)(rong)(rong)(rong)、鉭、陶瓷電(dian)(dian)容(rong)(rong)(rong)(rong)，即使(shi)使(shi)用(yong)的(de)(de)(de)(de)電(dian)(dian)解(jie)電(dian)(dian)容(rong)(rong)(rong)(rong)，對其品質、性能及(ji)壽命要(yao)求也(ye)遠高于(yu)商(shang)(shang)用(yong)產品，現在(zai)(zai)的(de)(de)(de)(de)工(gong)控主(zhu)(zhu)板(ban)(ban)都(dou)基本(ben)(ben)(ben)(ben)上采(cai)用(yong)固(gu)(gu)態電(dian)(dian)容(rong)(rong)(rong)(rong)，特別中高端的(de)(de)(de)(de)工(gong)控主(zhu)(zhu)板(ban)(ban)。商(shang)(shang)用(yong)主(zhu)(zhu)板(ban)(ban)基本(ben)(ben)(ben)(ben)都(dou)是(shi)(shi)大(da)量(liang)采(cai)用(yong)針(zhen)(zhen)腳(jiao)式(shi)的(de)(de)(de)(de)大(da)電(dian)(dian)解(jie)電(dian)(dian)容(rong)(rong)(rong)(rong)，因(yin)為大(da)電(dian)(dian)解(jie)電(dian)(dian)容(rong)(rong)(rong)(rong)成本(ben)(ben)(ben)(ben)低、容(rong)(rong)(rong)(rong)值大(da)一(yi)個(ge)可以頂多個(ge)貼(tie)片或坦電(dian)(dian)容(rong)(rong)(rong)(rong)。從(cong)性質來(lai)說，電(dian)(dian)解(jie)電(dian)(dian)容(rong)(rong)(rong)(rong)穩定性不及(ji)鉭電(dian)(dian)容(rong)(rong)(rong)(rong)、陶瓷電(dian)(dian)容(rong)(rong)(rong)(rong)高，壽命不及(ji)它(ta)們長，耐高溫程度不及(ji)它(ta)們好。貼(tie)片式(shi)電(dian)(dian)容(rong)(rong)(rong)(rong)比(bi)針(zhen)(zhen)腳(jiao)式(shi)電(dian)(dian)容(rong)(rong)(rong)(rong)更加穩定。從(cong)價(jia)格上，鉭電(dian)(dian)容(rong)(rong)(rong)(rong)比(bi)普通的(de)(de)(de)(de)電(dian)(dian)解(jie)電(dian)(dian)容(rong)(rong)(rong)(rong)要(yao)貴，且由于(yu)鉭電(dian)(dian)容(rong)(rong)(rong)(rong)的(de)(de)(de)(de)電(dian)(dian)容(rong)(rong)(rong)(rong)量(liang)較小，使(shi)用(yong)在(zai)(zai)主(zhu)(zhu)板(ban)(ban)上時(shi)，需要(yao)使(shi)用(yong)更多數量(liang)的(de)(de)(de)(de)電(dian)(dian)容(rong)(rong)(rong)(rong)，單(dan)單(dan)鉭電(dian)(dian)容(rong)(rong)(rong)(rong)的(de)(de)(de)(de)成本(ben)(ben)(ben)(ben)就是(shi)(shi)電(dian)(dian)解(jie)電(dian)(dian)容(rong)(rong)(rong)(rong)的(de)(de)(de)(de)幾十(shi)倍，這也(ye)是(shi)(shi)導致(zhi)工(gong)控主(zhu)(zhu)板(ban)(ban)比(bi)商(shang)(shang)用(yong)主(zhu)(zhu)板(ban)(ban)成本(ben)(ben)(ben)(ben)價(jia)格高的(de)(de)(de)(de)原因(yin)之一(yi)。
　　
　　3)工控主板的PCB
　　
　　商(shang)用(yong)(yong)主板采用(yong)(yong)的(de)是(shi)4層(ceng)(ceng)PCB設計，一般的(de)PCB線(xian)路板分有四層(ceng)(ceng)，最上(shang)和(he)最下的(de)兩層(ceng)(ceng)是(shi)信號層(ceng)(ceng)，中(zhong)間兩層(ceng)(ceng)是(shi)接地層(ceng)(ceng)和(he)電源(yuan)(yuan)層(ceng)(ceng)，將(jiang)接地和(he)電源(yuan)(yuan)層(ceng)(ceng)放在(zai)中(zhong)間。工業主板采用(yong)(yong)的(de)是(shi)6層(ceng)(ceng)以上(shang)PCB線(xian)路板設計，其設計是(shi)為(wei)了(le)加強(qiang)主板的(de)抗電磁(ci)干(gan)擾、電磁(ci)兼容(rong)能力，增強(qiang)主板的(de)穩定性等(deng)(deng)等(deng)(deng)。
　　
　　4)工(gong)控主板(ban)的壽(shou)命
　　
　　與商用主板2到3年使用壽(shou)(shou)命(ming)不同，大(da)多數的工(gong)控主板壽(shou)(shou)命(ming)要求在3年以上，部分(fen)高(gao)品質的工(gong)控主板，使用壽(shou)(shou)命(ming)甚至達到5—7年。