S7-300自動(dòng)化系統(tǒng)采用模塊化設(shè)計(jì)。它擁有豐富的模塊，且這些模塊均可以獨(dú)立地組合使用。
一個(gè)系統(tǒng)包含下列組件：
CPU：
不同的 CPU 可用于不同的性能范圍，包括具有集成 I/O 和對(duì)應(yīng)功能的 CPU 以及具有集成 PROFIBUS DP、PROFINET 和點(diǎn)對(duì)點(diǎn)接口的 CPU。
用于數(shù)字量和模擬量輸入/輸出的信號(hào)模塊 (SM)。
用于連接總線和點(diǎn)對(duì)點(diǎn)連接的通信處理器 (CP)。
用于高速計(jì)數(shù)、定位（開(kāi)環(huán)/閉環(huán)）及 PID 控制的功能模塊（FM）。
根據(jù)要求，也可使用下列模塊：
用于將 SIMATIC S7-300 連接到 120/230 V AC 電源的負(fù)載電源模塊(PS)。
接口模塊 (IM)，用于多層配置時(shí)連接中央控制器 (CC) 和擴(kuò)展裝置 (EU)。
通過(guò)分布式中央控制器 (CC) 和 3 個(gè)擴(kuò)展裝置 (EU)，SIMATIC S7-300 可以操作多達(dá) 32 個(gè)模塊。所有模塊均在外殼中運(yùn)行，并且無(wú)需風(fēng)扇。
SIPLUS 模塊可用于擴(kuò)展的環(huán)境條件：
適用于 -25 至 +60℃ 的溫度范圍及高濕度、結(jié)露以及有霧的環(huán)境條件。防直接日曬、雨淋或水濺，在防護(hù)等級(jí)為 IP20 機(jī)柜內(nèi)使用時(shí)，可直接在汽車或室外建筑使用。不需要空氣調(diào)節(jié)的機(jī)柜和 IP65 外殼。
6ES7 138-4CA01-0AA0138-4CA01-1AA0
以下產(chǎn)品基本都是要訂貨，周期有4-6周，也有9-11周，價(jià)格優(yōu)惠，歡迎詢價(jià)！
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