I/O-Modules
Fieldbus Terminals
1-Channel Bridge Input Terminal, DMS
Product Description

 The analog input terminal KL3351 enables the direct link of a resistor measurement bridge. The bridge voltage UD and supply voltage Uref of the bridge are digitized with a resolution of 16 bits and transported galvanically separately to the higher-level control system. The input channels are available as two 16 bit values for further processing. The result of measurement can be calculated by the formula: Measured value = UD / Uref. Due to the accurate measurement of supply voltage as well as bridge voltage in one measurement transformer, long-term and temperature drift are compensated.

 

Technical data

 KL3351

Number of inputs

 2, for one resistor bridge

Power supply

 via the K-Bus

Signal voltage UD

 -16 mV ... +16 mV, configurable
Signal voltage Uref 0 V ... +16 V, configurable

Internal resistance

 > 200 kW (Uref), > 1 MW (UD)

Power supply UV

 5 V, 20 mA

Resolution

 16 bits
Conversion time < 250 ms. configurable

Measuring error (total measuring range)

 < ± 0.1% (of the upper range value)
Filter 50 Hz, configurable
Electrical isolation 500 Vrms (K-Bus / signal voltage)
Current consumption from K-Bus 65 mA typ.
Bit width in the process image I: 2 x 16 bits data, (2 x 8 bits control/status optional)

Configuration

 no address or configuration settings

Operating temperature

 0°C ... +55°C

Storage temperature

 -25°C ... +85°C

Relative humidity

 95%, no condensation

Vibrations/Shock resistance

 conforms to IEC 68-2-6 / IEC 68-2-27

EMC resistance burst / ESD

 conforms to EN 50082 (ESD, Burst) / EN 50081

Installation position

 any

Type of protection

 IP20

 

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Copyright © 2000 TRS Fieldbus Systems, Inc. All rights reserved.
Revised: July 03, 2000 .