SM 421 數(shù)字量輸入模塊- 訂貨數(shù)據(jù)
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跳轉(zhuǎn)到概述 應(yīng)用 設(shè)計(jì) 功能 技術(shù)規(guī)范 更多信息 概述- 用于SIMATIC S70-400 的數(shù)字量輸入
- 用于連接標(biāo)準(zhǔn)開關(guān)和兩線制接近開關(guān) (BERO)

應(yīng)用數(shù)字量輸入模板用來實(shí)現(xiàn)PLC與數(shù)字量過程信號(hào)的連接。使用于連接標(biāo)準(zhǔn)開關(guān)和兩線制接近開關(guān) (BERO)。 
設(shè)計(jì)數(shù)字量輸入模塊具有以下機(jī)械特點(diǎn): - 設(shè)計(jì)緊湊:
堅(jiān)固的塑料機(jī)殼里包括:- 綠色 LED 指示輸入端的信號(hào)狀態(tài)
- 對于具有診斷和過程中斷的模板來說,紅色 LED 用來指示內(nèi)部和外部錯(cuò)誤/故障
- 標(biāo)簽條
- 安裝簡單
- 用戶友好的接線:
通過插入式前連接器來對模塊接線。

功能數(shù)字量輸入模塊把從過程發(fā)送來的外部數(shù)字信號(hào)電平轉(zhuǎn)換成S7-400內(nèi)部信號(hào)電平。 
技術(shù)規(guī)范Article number | 6ES7421-7BH01-0AB0 | 6ES7421-1BL01-0AA0 | 6ES7421-1EL00-0AA0 | 6ES7421-1FH20-0AA0 | 6ES7421-7DH00-0AB0 |
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| SM421, 16DI, DC24V, 0.05MS INPUT DELAY | SM421, 32DI, DC24V | SM421, 32DI, DC/AC 120V | SIMATIC S7-400, DIG.INPUT MOD. | SIMATIC S7-400, SM 421 |
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Supply voltage | | | | | | Load voltage L+ | | | | | | | 24 V | | | | | | 20.4 V | | | | | | 28.8 V | | | | | Input current | | | | | | from supply voltage L+, max. | 120 mA | | | | | from backplane bus 5 V DC, max. | 130 mA | 20 mA | 200 mA | 80 mA | 150 mA | Power loss | | | | | | Power loss, typ. | 5 W | 6 W | 6.5 W | 12 W | 8 W; 3.5 W (24 V DC); 6.5 W (48 V DC); 8.0 W (60 V DC) | Digital inputs | | | | | | Number of digital inputs | 16 | 32 | 32 | 16 | 16 | Number of simultaneously controllable inputs | | | | | | | 16 | 32 | 32 | 16 | 16 | Input voltage | | | | | | | DC | DC | AC/DC | AC/DC | AC/DC | | 24 V | 24 V | | | | | | | 120 V; 47 ... 63 Hz | 230 V; 120/230 V UC (47 ... 63 Hz) | 24 V; 24 V UC to 60 V UC (47 ... 63 Hz) | | -30 V DC to +5 V DC | -30 V DC to +5 V DC | 0 to 20 V UC | 0 to 40 V AC/ -40 to +40 V DC | -6 to +6 V DC/ 0 to 5 V AC | | 11 V DC to 30 V DC | 13 V DC to 30 V DC | 79 to 132 V AC; 80 to 132 V DC | 74 to 264 V AC; 80 to 264 V DC, -80 to -264 V | 15 to 72 V DC; -15 to -72 V DC; 15 to 60 V AC | Input current | | | | | | | | 1.3 mA | 1 mA | 6 mA; AC: 6 mA; DC: 2 mA | | | 6 mA; 6 to 8 mA | 7 mA | 2 mA; 2 to 5 mA | 10 mA; at 120 V: 10 mA AC, 1.8 mA DC; at 230 V: 14 mA AC, 2 mA DC | 4 mA; 4 to 10 mA | Input delay (for rated value of input voltage) | | | | | | for standard inputs | | | | | | | Yes | | | | Yes | | | | | | 0.5 ms; 0.5 / 3 / 10 / 20 ms | | 3 µs; 0.05 / 0.1 / 0.5 / 3 ms | 1.2 ms | 5 ms | | | | | 4.8 ms | 25 ms; 10 / 20 ms | 20 ms; AC: 20 ms; DC: 15 ms | | Cable length | | | | | | | 1 000 m; 1000 m: 3 ms, 70 m: 0.5 ms, 30 m: 0.1 ms, 30 m: 0.05 ms | 1 000 m | 1 000 m | 1 000 m | 1 000 m | | 600 m; 600 m: 3 ms; 50 m: 0,5 ms; 20 m: 0,1 ms; 20 m: 0,05 ms | 600 m | 600 m | 600 m | 600 m; 600 m: 3, 10, 20 ms; 100 m: 0,5 ms | Encoder | | | | | | Connectable encoders | | | | | | | Yes | Yes | Yes | Yes | Yes | | 3 mA | 1.5 mA | 1 mA | 5 mA; AC: 5 mA | 0.5 mA; 0.5 to 2 mA | Interrupts/diagnostics/status information | | | | | | Diagnostic functions | Yes; Parameterizable | No | | No | Yes; Parameterizable | Alarms | | | | | | | Yes; Parameterizable | | | | Yes; Parameterizable | | Yes; Parameterizable | | | | Yes; Parameterizable | Potential separation | | | | | | Potential separation digital inputs | | | | | | | 8 | 32 | 8 | 4 | 1 | | Yes | Yes | Yes | Yes | Yes | Isolation | | | | | | Isolation tested with | 500 V DC | 500 V DC | 1500 V AC | 1500 V AC | 1500 V AC | Dimensions | | | | | | Width | 25 mm | 25 mm | 25 mm | 25 mm | 25 mm | Height | 290 mm | 290 mm | 290 mm | 290 mm | 290 mm | Depth | 210 mm | 210 mm | 210 mm | 210 mm | 210 mm | Weights | | | | | | Weight, approx. | 600 g | 500 g | 600 g | 650 g | 600 g | 
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