倍加福KFD0-SCS-EX1.55回路供电安全栅特征
•单通道安全栅
•24v直流电源(回路供电)
•电流输入/输出4mA…20mA
•HART I/P或者变送器
•低压降
•线路故障检测(LFD)
•根据IEC 61508，安全等级可达SIL2
应用
这种隔离屏障用于内在安全应用。它是环路供电和隔离一个4 mA…20毫安信号发射机和***器，是哈特兼容。与有源隔离器相比，具有明显的低功耗模块，屏障5v降，适用于发射机应用与不稳定的电源之间20v直流…30 V直流。如果控制得当，现场电路的线路故障检测是可能的对安全区域内的回路进行过尺度或过尺度监控4 mA的条件…20 ma范围。该模块还可用于控制电磁阀和离散输出，如led。在这种情况下，终端8-而9+则由24v信号驱动。
技术参数
General specificati***
Signal type Analog output
Supply
Rated voltage Un loop powered
Power dissipation 0.2 W
Field circuit
Connection terminals 1+, 2 / 3-
Voltage ≥ 16 V for supply voltage > 21 V
Current 4 ... 20 mA (linear tran***ission 1 ... 22 mA)
Load ≤ 800 Ω (at 20 mA)
Supply circuit
Connection terminals 8-, 9+
Voltage max. 30 V DC
Current 4 ... 20 mA (quiescent current < 0.5 mA)
Power dissipation 150 mW at 20 mA and UE < 24 V
Transfer characteristics
Voltage drop see note
Deviation
After calibration ≤ &plu***n; 80 μA linearity, load and voltage dependence at 20 °C (68 °F)
Influence of ambient temperature < 0.5 μA/K
Damping approx. 3 dB
Rise time ≤ 20 μs at 0 Ω, ≤ 600 μs with 800 Ω load
Electrical isolation
Input/Output safe electrical isolation acc. to IEC/EN 60079-11, voltage peak value 375 V
Directive conformity
Electromagnetic compatibility
Directive 2004/108/EC EN 61326-1:2006
Conformity
Electromagnetic compatibility NE 21:2007
Degree of protection IEC 60529:2001
