ABB AI835A

ABB AI835A is an analog input module,mainly used for thermocouple/mV measurement.The following is a detailed introduction to ABB AI835A:

I.Product Overview

The ABB AI835A module provides 8 differential input channels for measuring thermocouple and mV signals.Each channel can be configured to measure a linear range of-30mV to+75mV,or to measure signals of a specific type of thermocouple(such as B,C,D,E,J,K,L,N,R,S,T and U,etc.).

ABB AI835A

II.Main Features

High resolution:ABB AI835A has 15-bit resolution,which can ensure high measurement accuracy.

Differential input:The design of 8 differential input channels improves the anti-interference ability of the signal.

Support for multiple thermocouple types:Supports multiple types of thermocouple measurements to meet the needs of different applications.

Cold junction temperature compensation:One of the channels(channel 8)can be configured as a”cold junction”(ambient)temperature measurement,thereby serving as a CJ(cold junction compensation)channel for other channels,thus achieving cold junction temperature compensation.

Monitoring input status:The module can monitor whether the input is disconnected or open,improving the reliability of the system.

III.Technical specifications

Number of channels:8 differential input channels

Measurement range:-30mV to+75mV linear,or TC type B,C,D,E,J,K,L,N,R,S,T and U(AI835A also supports D,L and U)

Resolution:15 bits

Input impedance:>1MΩ

Isolation:Grouped and ground isolated

Maximum error:0.1%

Temperature drift:Typical value 5ppm/°C,maximum value 7ppm/°C

Update cycle time:50 280+80(number of active channels)ms at Hz;250+70(number of active channels)ms at 60Hz

Maximum field cable length:600 meters(656 yards)

Common mode rejection ratio(CMRR):120 dB at 50Hz and 60Hz

Nuclear magnetic resonance(NMRR):>60 dB at 50Hz and 60Hz

Rated insulation voltage:50V

Dielectric test voltage:500V AC

Power consumption:1.6W

Current consumption:75mA for+5V Modulebus

IV.Application areas

ABB AI835A

ABB AI835A modules are widely used in industrial automation,especially in situations where high-precision thermocouple/mV signal measurement is required,such as temperature control systems,environmental monitoring systems,process control systems,etc.

V.Precautions

Before use,please read the product manual carefully to understand the product’s usage and precautions.

Please ensure that the power and signal lines of the product are connected correctly to avoid damage to the product or measurement errors.

During installation and commissioning,please follow the relevant safety regulations and operating guidelines to ensure the safety of personnel and equipment.

If you encounter any problems or need technical support,please contact the technical support team of ABB or the distributor in time.

In summary,ABB AI835A is a comprehensive and high-performance analog input module suitable for thermocouple/mV signal measurement in a variety of industrial automation fields.

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