DSS直接接觸速度開關(guān)是一個緊湊的開關(guān)設(shè)計,包括所有的機械和電子元件在一個外殼。 它將產(chǎn)生一個輸出信號在預(yù)定的速度,可以是超速,低速或零速度。 堅固耐用的結(jié)構(gòu)與固態(tài)電子和光電技術(shù)相結(jié)合,使這是的運動探測器之一。 DSS保護所有有價值的旋轉(zhuǎn)設(shè)備,包括帶式輸送機、斗式提升機、旋轉(zhuǎn)式給料機或螺旋輸送機。 它以順時針或逆時針方向工作,并安裝在任何位置。
DSS通過安裝在輸入軸上的精密金屬圓盤來感知運動。當(dāng)圓盤外圍的一系列狹槽通過紅外線光源旋轉(zhuǎn)時,圓盤產(chǎn)生可測量的光脈沖。光電傳感器監(jiān)控一系列光脈沖并將它們轉(zhuǎn)換成數(shù)字電子信號。然后,固態(tài)電路分析數(shù)字信號,并以預(yù)設(shè)的信號速度激活或不激活輸出繼電器。它還具有一個可調(diào)的內(nèi)置時間延遲,消除了需要一個單獨的啟動時間延遲繼電器。DSS將感知超速或低速情況。每個裝置有三個信號速度范圍。低信號速度范圍從0.1到10 RPM。中等信號速度范圍是1到100 RPM,而高速范圍是10到1000 RPM。
信號設(shè)定點的現(xiàn)場調(diào)整很容易通過調(diào)節(jié)螺釘來實現(xiàn)。信號速度范圍由印刷電路板上的三位撥動開關(guān)選擇。對于低速感應(yīng),信號點設(shè)置在機組正常運行速度以下。如果速度低于信號設(shè)定值,輸出繼電器就會斷電。對于超速檢測,信號設(shè)定值設(shè)置在正常工作速度之上。如果速度超過信號設(shè)定值,輸出繼電器將通電。輸出繼電器可以是常開的,也可以是常關(guān)的。通過將信號設(shè)定點調(diào)節(jié)螺釘鎖定在0.1 RPM的設(shè)置處,可以實現(xiàn)零速度檢測。當(dāng)機組的軸速接近零時,輸出繼電器將斷電。
Temperature Limits:-50 to 150°F (-45 to 65°C).
Enclosure:Aluminum with screw cover.
Enclosure Rating:DSS-W: meets NEMA 4X; DSS-E: meets NEMA 4X, UL Class I groups C & D, Class II groups F & G.
Switch Type:DPDT.
Electrical Rating:3A @ 120/240 VAC, 1/10 Hp @120/240 VAC.
Electrical Connections:Screw terminal.
Conduit Connections:(2) 3/4" female NPT.
Mounting Orientation:
Any.Set Point Adjustment:Adjustment screw.Power Requirements:
105-135 VAC, 50/60 Hz, 210-250 VAC, 50/60 Hz; or 24 VAC/DC depending on model.
Power Consumption:3 Watts.
Repeatability:2% maximum at constant voltage and temperature.
Pick-up Point:3 speed ranges at which relay will energize: LOW: 0.1 to 10 RPM; MEDIUM: 1 to 100 RPM; HIGH: 10 to 1000 RPM.
Signal Point:Speed at which relay will de-energize. Recommended to be 15-20% lower than pick-uppoint.
Start-up Delay:Adjustable up to 45 seconds.
Radial Load on Input Shaft:125 lbs maximum.
End Thrust on Input Shaft:100 lbs maximum.
Rotation:Either clockwise or counter-clockwise.
Driving Torque:1"/lb maximum.
Shaft:5/8" diameter with 3/16" x 7/8" key.
Weight:5 lbs (2.3 kg).
Agency Approvals:cUL, UL.
Model | Description |
---|---|
DSS-E1 | Direct-contact speed switch, 120 VAC, aluminum explosion-proof enclosure. |
DSS-E2 | Direct-contact speed switch, 240 VAC, aluminum explosion-proof enclosure. |
DSS-E3 | Direct-contact speed switch, 24 VAC/DC, aluminum explosion-proof enclosure. |
DSS-W1 | Direct-contact speed switch, 120 VAC, aluminum weatherproof enclosure. |
DSS-W2 | Direct-contact speed switch, 240 VAC, aluminum weatherproof enclosure. |
DSS-W3 | Direct-contact speed switch, 24 VAC/DC, aluminum weatherproof enclosure. |