Digital Input
KL1212
Input 1
Power contacts
Input 2
+24 V
0 V
+24 V
Signal LED1
Signal LED2
3-wire
2-wire
Top view
Contact assembly
Connection
Error LED1
Error LED2
+24 V
KL1212 | 2-channel digital input terminal 24 V DC, with short-circuit protected sensor supply and diagnostic
The KL1212 digital input terminal acquires the binary control signals from the process level and transmits them, in an electrically isolated form, to the higher-level automation unit. The KL1212 generates a short-circuit protected 24 V DC supply voltage for sensors. The sensor outputs can be switched on or off by the controller. A short-circuit or an open lead in the sensor supply is detected, and the terminal status is relayed to the controller via the K-bus. The Bus Terminal contains two channels that indicate their signal state and errors by means of LEDs.
| Technical data | KL1212 | KS1212 | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of inputs | 2 | ||||||||||||||||
| Nominal voltage | 24 V DC (-15 %/+20 %) | ||||||||||||||||
| “0“ signal voltage | -3…+5 V | ||||||||||||||||
| “1“ signal voltage | 15…30 V | ||||||||||||||||
| Input filter | 3.0 ms | ||||||||||||||||
| Input current | typ. 5 mA | ||||||||||||||||
| Sensor supply max. | 0.5 A (short-circuit-proof) | ||||||||||||||||
| Current consumption K-bus | typ. 8 mA | ||||||||||||||||
| Electrical isolation | 500 Vrms (K-bus/field potential) | ||||||||||||||||
| Bit width in the process image | input/output: 4 inputs (2 error bits/2 signal bits); 2 outputs (2 sensor supply) | ||||||||||||||||
| Input/output bit assignments |
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| Configuration | no address or configuration setting | ||||||||||||||||
| Weight | 55 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 60068-2-27/29 | ||||||||||||||||
| EMC immunity/emission | conforms to EN 61000-6-2/EN 61000-6-4 | ||||||||||||||||
| Protect. class/installation pos. | IP 20/variable | ||||||||||||||||
| Pluggable wiring | for all KSxxxx Bus Terminals |
Product announcement |
KL1212: available KS1212: estimated market release 3rd quarter 2009 |