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Digital outputKL2808
HD Bus Terminal, 8-channel digital output 24 V DC KL2808 Signal LEDs
1…8 Power contact
+24 V Power contact 0 V Output 1 Output 2 Output 3 Output 4 Output 5 Output 6 Output 7 Output 8 0 V 0 V 0 V 0 V 0 V 0 V 0 V 0 V Top view Contact assembly extended shock and vibration range
KL2808 | HD Bus Terminal, 8-channel digital output 24 V DC
The KL2808 digital output terminal connects the binary control signals from the automation device on to the actuators at the process level with electrical isolation. The KL2808 is protected against polarity reversal and processes load currents with outputs protected against overload and short-circuit. The Bus Terminal contains eight channels, consisting of a signal output and 0 V DC. The signal states are displayed by LEDs. The power contacts are looped through.
The outputs are fed via the 24 V power contact in the KL2808. The conductors can be connected without tools in the case of solid wires using a direct plug-in technique.
The HD Bus Terminals (High Density) with increased packing density feature 16 connection points in the housing of a 12 mm terminal block.
Technical data KL2808
Connection technology 2-wire
Number of outputs 8
Rated load voltage 24 V DC (-15 %/+20 %)
Load type ohmic, inductive, lamp load
Max. output current 0.5 A (short-circuit-proof) per channel
Short circuit current < 2 A
Breaking energy < 150 mJ/channel
Reverse voltage protection yes
Electrical isolation 500 V (K-bus/field potential)
Current consumption power contacts typ. 15 mA + load
Current consumpt. K-bus typ. 20 mA
Bit width in the process image 8 outputs
Configuration no address or configuration setting
Conductor types solid wire, stranded wire and ferrule
Conductor connection solid wire conductors: direct plug-in technique; stranded wire conductors and ferrules: spring actuation by screwdriver
Rated cross-section solid wire: 0.08…1.5 mm2; stranded wire: 0.25…1.5 mm2; ferrule: 0.14…0.75 mm2
Weight approx. 65 g
Operating/storage temperature 0…+55 °C/-25…+85 °C
Relative humidity 95 %, no condensation
Vibration/shock resistance conforms to EN 60068-2-6/EN 60068-2-27
EMC immunity/emission conforms to EN 61000-6-2/EN 61000-6-4
Protect. class/installation pos. IP 20/variable (see documentation)
Approvals CE, UL, Ex, GL
Intel? 1.0 GHz Celeron? M Intel? Pentium? M 1.8 GHz
注意，CX10xx 和 CX90xx 的区别不仅在于时钟主频，还在于 CX10xx 的 CPU 是 x86，而 CX90xx 的 CPU 是 ARM 芯片，没有浮点运算协处理器。所以只有在纯逻辑运算的项目中， 才推荐使用 CX90xx 系列。
第 5 页 共 141 页 本文纯属个人经验，非 Beckhoff 公司正式发行，如有疑问，请直接联系作者。
2016-5-19
69725610.doc
下图说明分别执行字运算、位运算和浮点运算时，PLC、嵌入式 PC 和 IPC 的性能对比： 执行时间 [?s/5000 code lines]
3500 3000 2500 2000
1500 1616 1443 2898 2515
1500 1000 500 0
Test 1 Test 2 Test 3
93
39.5 14.12 9.84
5.66
5.62
