4WP6Y60/5現(xiàn)貨

入點數(shù)分，常用的有8點、12點、16點、32點等；按工作電壓分，常用的有直流5 V、12 V、24 V，交流110 V、220 V等選擇輸入模塊主要應(yīng)考慮以下兩點：
(1) 根據(jù)現(xiàn)場輸入信號(如按鈕、行程開關(guān))與PLC輸入模塊距離的遠近來選擇電壓的高低。一般，24 V以下屬低電平，其傳輸距離不宜太遠。如12 V電壓模塊一般不超過10 m，距離較遠的設(shè)備選用較高電壓模塊比較可靠。
(2) 高密度的輸入模塊，如32點輸入模塊，允許同時接通的點數(shù)取決于輸入電壓和環(huán)境溫度。一般，同時接通的點數(shù)不得超過總輸入點數(shù)的60％。
；按外部接線方式又可分為匯點輸入、分隔輸入等。
2．開關(guān)量輸出模塊的選擇
輸出模塊的任務(wù)是將PLC內(nèi)部低電平的控制信號轉(zhuǎn)換為外部所需電平的輸出信號，驅(qū)動外部負載。輸出模塊有三種輸出方式：繼電器輸出、雙向可控硅輸出和晶體管輸出。
1) 輸出方式的選擇
繼電器輸出價格便宜，使用電壓范圍廣，導通壓降小，承受瞬間過電壓和過電流的能力較強，且有隔離作用。但繼電器有觸點，壽命較短，且響應(yīng)速度較慢，適用于動作不頻繁的交直流負載。當驅(qū)動電感性負載時，大開閉頻率不得超過1 Hz。
晶閘管輸出(交流)和晶體管輸出(直流)都屬于無觸點開關(guān)輸出，適用于通斷頻繁的感性負載。感性負載在斷開瞬間會產(chǎn)生較高的反壓，必須采取抑制措施
2) 輸出電流的選擇
模塊的輸出電流必須大于負載電流的額定值，如果負載電流較大，輸出模塊不能直接驅(qū)動，則應(yīng)增加中間放大環(huán)節(jié)。對于電容性負載、熱敏電阻負載，考慮到接通時有沖擊電流，故要留有足夠的裕量。
3) 允許同時接通的輸出點數(shù)
在選用輸出模塊時，還要看整個輸出模塊的滿負荷能力，如OMRON公司的CQM1-OC222是16點輸出模塊，每個點允許通過電流2 A(AC250 VDC24 V)。但整個模塊允許通過的大電流僅8 A。
分配輸入輸出點
一般輸入點與輸入信號、輸出點與輸出控制是一一對應(yīng)的；在個別情況下，也有兩個信號用一個輸入點的，那樣就應(yīng)在接入輸入點前，按邏輯關(guān)系接好線(如兩個觸點先串聯(lián)或并聯(lián))，然后再接到輸入點。
1. 明確IO通道范圍
不同型號的PLC，其輸入輸出通道的范圍是不一樣的，應(yīng)根據(jù)所選PLC型號，弄清相應(yīng)的IO點地址的分配。
2. 內(nèi)部輔助繼電器

ACCURAY 067455-004 DISPLAY ACCURAY 067455004 MAKE OFFER
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4WP6Y60/5

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Enlarge
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4WP6Y60/5

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4WP6Y60/5