The KL3021 analog input terminal handles signals in the range from 4 to 20 mA. The current is digitized to a resolution of 12 bits and is transmitted, in an electrically isolated form, to the higher-level automation device. The input channels of the Bus Terminal have differential inputs and possess a common, internal ground potential. The KL3021 is characterized by its fine granularity and electrical isolation. An open lead or overload condition are detected, and the terminal status is relayed to the controller via the K-bus. The run LEDs give an indication of the data exchange with the Bus Coupler. The error LEDs indicate an overload condition and a broken wire.
Product status:
regular delivery
Product information
Technical data | KL3021 |
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Number of inputs | 1 |
Power supply | via the K-bus |
Signal current | 4…20 mA |
Technology | differential input |
Internal resistance | 80 Ω + diode voltage 0.7 V |
Common-mode voltage UCM | max. 35 V |
Conversion time | ~ 1 ms |
Resolution | 12 bit |
Measurement error/uncertainty | < ±0.3% (relative to full scale value) |
Surge voltage resistance | 35 V DC |
Electrical isolation | 500 V (K-bus/signal voltage) |
Current consumption power contacts | – (no power contacts) |
Current consumption K-bus | typ. 60 mA |
Bit width in the process image | input: 1 x 16 bit data (1 x 8 bit control/status optional) |
Weight | approx. 70 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. rating/installation pos. | IP20/variable |
Approvals/markings | CE, UL, ATEX, IECEx, DNV GL |
Pluggable wiring | for all KSxxxx Bus Terminals |
Ex marking | ATEX: II 3 G Ex ec IIC T4 Gc IECEx: Ex ec IIC T4 Gc |
Housing data | KL-12-8pin | KS-12-8pin |
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Design form | compact terminal housing with signal LEDs | terminal housing with pluggable wiring level |
Material | polycarbonate | |
Dimensions (W x H x D) | 12 mm x 100 mm x 68 mm | |
Installation | on 35 mm DIN rail, conforming to EN 60715 with lock | |
Side by side mounting by means of | double slot and key connection | |
Marking | labeling of the BZxxx series | |
Wiring | solid conductor (s), flexible conductor (st) and ferrule (f): spring actuation by screwdriver | |
Connection cross-section | s*: 0.08…2.5 mm², st*: 0.08…2.5 mm², f*: 0.14…1.5 mm² | s*: 0.08…1.5 mm², st*: 0.08…1.5 mm², f*: 0.14…1.5 mm² |
Connection cross-section AWG | s*: AWG28…14, st*: AWG28…14, f*: AWG26…16 | s*: AWG28…16, st*: AWG28…16, f*: AWG26…16 |
Stripping length | 8…9 mm | 9…10 mm |
Current load power contacts | Imax: 10 A |
*s: solid wire; st: stranded wire; f: with ferrule
Ordering information | |
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KL3021 | Bus Terminal, 1-channel analog input, current, 4…20 mA, 12 bit, differential |
KS3021 | Bus Terminal, 1-channel analog input, current, 4…20 mA, 12 bit, differential, pluggable wiring |
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