倍加福KFD2-DWB-Ex1.D频率输入安全栅特征

•单通道安全栅

•24v直流电源(工作电压)

•干燥接触或NAMUR输入

•输入频率1mhz…5 kHz

•2继电器触点输出

•启动覆盖

•可通过键盘配置

•线路故障检测(LFD)

•根据iec61508 / iec61511，安全等级可达SIL2

应用

这种隔离屏障用于内在安全应用。它显示器为一个数字的超速或低速状态危险信号(NAMUR传感器/机械接触)将输入频率与用户进行比较编程参考频率。控件发出超速或低速状态的信号继电器输出。给出了现场电路的线路故障检测方法由一个红色的LED，电力轨和继电器。启动覆盖功能设置继电器输出默认条件编程由用户进行最多1000秒。该单位是易于编程的使用一个键盘定位在单元的前面。一个惟一的集体错误消息传递特性在什么时候可用与动力轨系统配套使用。

技术参数

General specifications
Signal type Digital Input
Functional safety related parameters
Safety Integrity Level (SIL) SIL 2
Supply
Connection terminals 23+, 24- or power feed module/Power Rail
Rated voltage Ur 20 30 V DC
Rated current Ir approx. 100 mA
Power dissipation/power consumption ≤ 1.8 W / 1.8 W
Input
Connection side field side
Connection Input I: intrinsically safe: terminals 1+, 3-
Input II: non-intrinsically safe: terminals 13+, 14-
Input I acc. to EN 60947-5-6 (NAMUR), see system description for electrical data
Pulse duration > 50 μs
Input frequency 0.001 5000 Hz
Line fault detection breakage I ≤ 0.15 mA; short-circuit I > 6.5 mA
Input II startup override: 1 1000 s, adjustable in steps of 1 s
Active/Passive I > 4 mA (for min. 100 ms) / I < 1.5 mA
Open circuit voltage/short-circuit
current
18 V / 5 mA
Output
Connection side control side
Connection output I: terminals 10, 11, 12
output II: terminals 16, 17, 18
Output I, II signal, relay
Contact loading 250 V AC / 2 A / cos φ ≥ 0.7; 40 V DC / 2 A
Mechanical life 5 x 107 switching cycles
Energized/De-energized delay approx. 20 ms / approx. 20 ms
Collective error message Power Rail