Description

Allen Bradley 1746-NT8 is a SLC 500 thermocouple/mV analog input module.Here is a detailed introduction to it:

1.Basic Information

Manufacturer:Rockwell Automation

Brand:Allen Bradley

Model:1746-NT8

Series:SLC 500

II.Technical Specifications

Number of channels:8

Compatible sensors:Thermocouple sensors such as J,K,T,E,S,R,B and N,and mV inputs such as±50mV and±100mV

Backplane rated current:120mA at 5V DC,70mA at 24V DC

Total backplane power:2.28W

Signal conversion method:Δ-Σ(Delta-Sigma)

Digital low-pass filter:With optional programmable filter frequency

Allen Bradley 1746-NT8

Normal mode rejection frequency:Higher than 100dB at 50~60Hz

Common mode rejection frequency:Higher than 100dB at 50~60Hz

Auto-calibration:Auto-calibration approximately every 2 minutes after power-on

Input overvoltage protection:±30V DC and 600W pulse 1ms

Circuit isolation:Between input and chassis ground and between input and backplane Provides 12.5V DC circuit isolation,test voltage is 500V DC for 1 minute

LED indicator:9 green LED lights to indicate channel status and module status

Cold junction compensation(CJC)sensor:2,accuracy is±1.72 degrees Celsius

Total input impedance:greater than 10M ohms

Input device impedance requirement:less than 100 ohms to meet accuracy requirements

Open circuit detection function:1 cycle per channel,overall input dry circuit response time is 400 milliseconds

Functional temperature range:0 degrees Celsius to 60 degrees Celsius(humidity 5%~95%,no condensation)

Update time:356 milliseconds to 4.05 seconds

Step response:400 milliseconds

Resolution:16 bits for input,14 bits for output

III.Features and functions

Multiple input types:Provides a variety of optional input types to meet different application requirements.

High accuracy:Ensure measurement accuracy through high-precision cold junction compensation sensors and input impedance requirements.

Automatic calibration:Regular automatic calibration reduces manual intervention and improves measurement accuracy.

Strong anti-interference ability:adopts advanced anti-interference technology to ensure stable operation in complex environments.

Easy to install and maintain:adopts modular design,easy to install,easy to maintain and replace.

Allen Bradley 1746-NT8

IV.Application and compatibility

Application field:widely used in automation control systems in manufacturing,automotive,energy,chemical,food and beverage and other industries.

Compatibility:compatible with fixed and modular SLC 500,such as SLC 5/01,5/02,5/03,5/04 and 5/05 processors.At the same time,the module can be installed in a fixed chassis,especially using the 1746-A2 chassis.If used with a modular controller,the module can be installed in any slot except slot 0.

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