MOORE  16101-1

咨詢熱線--17750626260　     

 PLC的外部設備主要是指控制系統中的輸入輸出設備，其中輸人設備是對系統發出各種控制信號的主令電器，在編寫控制程序時必須注意外部輸入設備使用的是常開還是常閉觸點，并以此為基礎進行程序編制。否則易出現控制錯誤。

 在PLC內部存儲器中有專用于輸入狀態存儲的輸入繼電器區，各輸入設備（開關、按鈕、行程開關或傳感器信號）的狀態經由輸入接口電路存儲在該區域內，每個輸入繼電器可存儲一個輸入設備狀態。PLC中使用的"繼電器"并非實體繼電器，而是"軟繼電器"，可提供無數個常開、常閉觸點用于編程。每個"軟繼電器"僅對應PLC存儲單元中的一位（bit），該位狀態為"1"，表示該"軟繼電器線圈"通電，則程序中所有該繼電器的觸點都動作。輸入繼電器作為PLC接收外部主令信號的器件，通過接線與外部輸入設備相聯系，其"線圈"狀態只能由外部輸入信號驅動。

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SPIRAX SARCO MAIN VALVE ASSEMBLY FT 14 1/2"-3/4"
 
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CONBRACO 3/4"NPT VACUUM BREAKER 38-104 *NEW*
 
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REGO 3/4"NPT 3/8"I.D 150PSIG RELIEF VALVE NRV500BB *NEW*
 
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AIRMATIC-ALLIED 120V 11W 60HZ 1/8" ORIFICE SOLENOID VALVE, A322704 *NEW NO BOX*
 
RELIEF VALVE 3/4" 150 PSI STD.Z21.22 9740N EXT 5
 
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SMC VZ1120-5LN-M5 0.15-0.7MPa 24V DC GO S'PORE NEW
 
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APOLLO 1000 PSIG WOG 3/4" SIZE 3-PC BALL VALVE, 83R-244-02 *NEW*
 
LEGEND VALVE 150 CWP 2" PVC TRUE union BALL VALVE, T/S-603 *NEW*
 
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GUARDIAN 24V SOLENOID VALVE 4HD CONT 24D *NEW*
 
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VICKERS PRESSURE REDUCING VALVE DGMX2-5-PP-AW-E?-S-30
 
HYTORK ACTUATOR 425 W/ TRICENTRIC 4" VALVE A351 CF8M
 
R-P&C 1/2" 1500PSI 839F C.S. TYPE SBOX
 
PARKER 2000PSI 8 GPM 30 LPM 3/8"-18 NPT HYDRAULIC BRASS CHECK VALVE, C600B *NEW*
 
CONBRACO INDUSTRIES R-P&C 1/2" GATE VALVE S-BOX
 
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SYNDEVCO 40508002 75503/2 WYE SERIES DOUBLE MANIFOLD 3/4 INCH, NNB
 
BAILEY'S 1-1/2" VALVE
 
REXROTH CONTROL VALVE 3DREP 6 B-14/25A24NK4M
 
APOLLO 1000 WOG 316 S.S. 1/2" NPT BALL VALVE, 83-140-01 *NEW*
 
FLOW-TEK 1/4" NPT 1000 WOG CF8M STAINLESS STEEL BALL VALVE, SERIES 700
 
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