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  • 1746-INT4
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1746-INT4

Allen-Bradley 1746-INT4 SLC 500 Thermocouple Module

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  • Manufacturer: Allen-Bradley

  • Product No.: 1746-INT4

  • Product Type: Input Module

  • Product Origin: USA

  • Payment:T/T, Western Union

  • Weight: 350g

  • Shipping port: Xiamen

  • Warranty: 12 months

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Product Overview

The Allen-Bradley 1746-INT4 is a 4-channel isolated thermocouple/mV analog input module for the SLC 500 platform. Each channel supports types C, D, J, K, T, E, R, S, B, and N thermocouples plus -100 to 100 mV DC signals, storing digitally converted data for SLC 500 processors. The module weighs approximately 0.35 kg (0.77 lb).

Technical Specifications

Manufacturer Rockwell Automation / Allen-Bradley
Catalog Number 1746-INT4
Series SLC 500
Module Type Isolated Thermocouple/mV Analog Input Module
Inputs 4 isolated channels
Thermocouple Types C, D, J, K, T, E, R, S, B, N
mV Signal Inputs -50…50 mV DC; -100…100 mV DC
Resolution 16 bits
Bandwidth 8 Hz
Conversion Method Sigma-Delta ADC modulation
Cold Junction Accuracy ±1.5°C, 0…70°C
Isolation 1000V transient / 150V AC channel-to-channel and channel-to-backplane
Input Impedance > 10 MΩ
Open-Circuit Detection Upscale, downscale, or zero; 20 nA, 5 s typical
Update Time 500 ms
Backplane Current (5V) 110 mA
Backplane Current (24V) 85 mA
Weight 0.35 kg (0.77 lb) approx.
Operating Temperature 0°C to +60°C (32°F to +140°F)
Humidity 5% to 95% non-condensing
Certifications CE, CSA, UL

Engineering Advantages

Four individually isolated channels prevent ground loops between thermocouples and the backplane. Sigma-Delta conversion with 16-bit resolution captures fine temperature changes across an 8 Hz bandwidth. Common mode rejection exceeds 120 dB between inputs and chassis ground. Open-circuit detection flags faulted inputs on HMI/SCADA screens for fast troubleshooting. At roughly 0.35 kg, the module adds minimal weight to the chassis. The module requires field calibration at least once per year.

Technical FAQs

Q1: What thermocouple types does the 1746-INT4 support?
A1: Types C, D, J, K, T, E, R, S, B, and N, plus -100…100 mV DC signals.

Q2: What is the resolution and isolation rating?
A2: 16-bit resolution with 1000V transient / 150V AC channel isolation.

Q3: How is cold junction compensation accuracy rated?
A3: ±1.5°C across 0…70°C using the dedicated CJC terminal.

Product Resources

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🏷️ Tags: AC Input Module

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