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KL3021 | Bus Terminal, 1-channel analog input, current, 4…20 mA, 12 bit, differential

KL3021 | Bus Terminal, 1-channel analog input, current, 4…20 mA, 12 bit, differential

KL3021 | Bus Terminal, 1-channel analog input, current, 4…20 mA, 12 bit, differential

Run LED 1
Error LED 1
+Input 1
-Input 1
Ground
Shield
Ground
Shield
Top view 
Contact assembly 
KL3021 | Bus Terminal, 1-channel analog input, current, 4…20 mA, 12 bit, differential

KL3021 | Bus Terminal, 1-channel analog input, current, 4…20 mA, 12 bit, differential

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 dataKL3021
Number of inputs1
Power supplyvia the K-bus
Signal current4…20 mA
Technologydifferential input
Internal resistance80 Ω + diode voltage 0.7 V
Common-mode voltage UCMmax. 35 V
Conversion time~ 1 ms
Resolution12 bit
Measurement error/ uncertainty< ±0.3 % (relative to full scale value)
Surge voltage resistance35 V DC
Electrical isolation500 V (K-bus/signal voltage)
Current consumption power contacts– (no power contacts)
Current consumption K-bustyp. 60 mA
Bit width in the process imageinput: 1 x 16 bit data (1 x 8 bit control/status optional)
Weightapprox. 70 g
Operating/storage temperature0…+55 °C/-25…+85 °C
Relative humidity95 %, no condensation
Vibration/shock resistanceconforms to EN 60068-2-6/EN 60068-2-27
EMC immunity/emissionconforms to EN 61000-6-2/EN 61000-6-4
Protect. rating/installation pos.IP20/variable
Approvals/markingsCE, UL, ATEX, IECEx, DNV GL
Pluggable wiringfor all KSxxxx Bus Terminals
Ex markingATEX:
II 3 G Ex ec IIC T4 Gc
IECEx:
Ex ec IIC T4 Gc
Housing dataKL-12-8pinKS-12-8pin
Design formcompact terminal housing with signal LEDsterminal housing with pluggable wiring level
Materialpolycarbonate
Dimensions (W x H x D)12 mm x 100 mm x 68 mm
Installationon 35 mm DIN rail, conforming to EN 60715 with lock
Side by side mounting by means ofdouble slot and key connection
Markinglabeling of the BZxxx series
Wiringsolid conductor (s), flexible conductor (st) and ferrule (f): spring actuation by screwdriver
Connection cross-sections*: 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 AWGs*: AWG 28…14,
st*: AWG 28…14,
f*: AWG 26…16
s*: AWG 28…16,
st*: AWG 28…16,
f*: AWG 26…16
Stripping length8…9 mm9…10 mm
Current load power contactsImax: 10 A

*s: solid wire; st: stranded wire; f: with ferrule

Ordering information
KL3021Bus Terminal, 1-channel analog input, current, 4…20 mA, 12 bit, differential
KS3021Bus Terminal, 1-channel analog input, current, 4…20 mA, 12 bit, differential, pluggable wiring

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