倍加福KFD2-SCD2-Ex1.LK安全柵特征
?單通道
?24v直流電源(電源線)
?電流輸出700Ω負載
?HART I/P和閥門定位器
?線路故障檢測(LFD)
?準確度0.05%
?帶有測試插座的終端塊
?根據(jù)IEC 61508，安全等級可達SIL2
應用
這種隔離屏障用于內在安全應用。它驅動智能I/P轉換器，電動閥門，和危險區(qū)域的定位器。的模擬值上疊加數(shù)字信號現(xiàn)場或控制端，雙向傳輸。電流通過DC/DC轉換器被重復終端1和2。一個開路和短路的場電路具有高輸入控制端阻抗允許通過檢測線路故障控制系統(tǒng)。如果數(shù)字通信的環(huán)路電阻太低，一個內部之間的250Ω電阻終端8和9可用，可用作HART通信電阻。用于連接HART通信器的套接字為集成到設備的終端。一個集體錯誤消息傳遞特性在什么時候可用與動力軌系統(tǒng)配套使用。
技術參數(shù)
General specifications
Signal type Analog output
Supply
Connection Power Rail or terminals 14+, 15-
Rated voltage Un 20 ... 35 V DC
Ripple within the supply tolerance
Power loss 0.8 W at 20 mA into 10 V (equivalent to 500 Ω) load
Power consumption 1 W at 20 mA
Input
Connection terminals 7-, 8+, (9+)
Voltage drop approx. 4 V or internal resistance 200 Ω at 20 mA
Input resistance > 100 kΩ, when wiring resistance in the field > 16 V (equivalent to 800 Ω at 20 mA)
Current 4 ... 20 mA limited to approx. 25 mA
Output
Connection terminals 1+, 2-
Current 4 ... 20 mA
Load 100 ... 700 Ω
Voltage ≥ 14 V at 20 mA
Transfer characteristics
Deviation
After calibration at 20 °C (68 °F): ≤ 10 μA incl. non-linearity, calibration, hysteresis, supply and load changes
Influence of ambient temperature ≤ 1 μA/K
Rise time < 100 μs , 10 ... 90 % step change
Electrical isolation
Input/power supply functional insulation, rated insulation voltage 50 V AC
Directive conbity
Electromagnetic compatibility
Directive 2004/108/EC EN 61326-1:2006
Conbity
Electromagnetic compatibility NE 21:2011
Degree of protection IEC 60529:2001
Protection against electrical shock UL 61010-1:2004
Ambient conditions
Ambient temperature -20 ... 60 °C (-4 ... 140 °F)
