KL3351 | Bus Terminal, 1-channel analog input, measuring bridge, full bridge, 16 bit

KL3351 | Bus Terminal, 1-channel analog input, measuring bridge, full bridge, 16 bit

The KL3351 analog input terminal permits direct connection of a resistor bridge. The bridge voltage, UD, and the supply voltage, UREF, to the bridge are digitized with a 16 bit resolution, and are transmitted along an electrically isolated channel to the supervising automation system. The input channels are available in the form of two 16 bit values for further processing. The resulting measurement can be calculated from the formula: measurement = UD/UREF. Precise acquisition of the supply voltage along with the bridge voltage compensates for long-term and temperature drift.

Number of inputs 2, for 1 resistor bridge

Power supply via the K-bus

Signal voltage UD -16…+16 mV, configurable

Signal voltage UREF ±10 V

Technology strain gauge connection

Internal resistance > 200 kΩ (UREF), > 1 MΩ (UD)

Power supply UV 5 V DC, max. 20 mA

Conversion time < 250 ms, configurable

Filter 50 Hz, configurable

Resolution 16 bit

Measurement error/ uncertainty < ±0.1 % (relative to full scale value)

Current consumption power contacts – (no power contacts)

Current consumption K-bus typ. 65 mA

Bit width in the process image input: 2 x 16 bit data (2 x 8 bit control/status optional)

Special features with internal bridge supply

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

Pluggable wiring for all KSxxxx Bus Terminals

Ex marking ATEX:

II 3 G Ex ec IIC T4 Gc

IECEx:

Ex ec IIC T4 Gc 

>>> Refer to technical document: kl3351en