The Allen-Bradley 1746-NT8 is a specialized analog input module designed for the SLC 500 programmable controller platform. This module features 8 differential input channels, specifically engineered to interface with thermocouple and millivolt-level signals. It provides high-precision data acquisition for temperature control and monitoring applications within industrial automation environments.
Features
8-channel differential input configuration.
Supports a wide range of thermocouple types (J, K, T, E, R, S, B, N) and millivolt input ranges.
High-resolution analog-to-digital conversion for accurate process monitoring.
Direct compatibility with the Allen-Bradley SLC 500 backplane.
Integrated digital filtering to reduce noise interference in industrial settings.
Applications
The 1746-NT8 is primarily utilized in process control systems where temperature sensing is critical. Common applications include heating furnaces, chemical processing reactors, environmental chambers, and general industrial temperature logging where thermocouple integration is required.
Technical Specifications
Model
1746-NT8
Manufacturer
Allen-Bradley
Input Channels
8 Differential
Input Types
Thermocouple (J, K, T, E, R, S, B, N), mV
Backplane Power Consumption
Dependent on system configuration
Operating Temperature
0 to 60 degC
Storage Temperature
-40 to 85 degC
Installation Guidelines
Ensure the SLC 500 system power is disconnected before installing or removing the module from the chassis.
Handle the module by the edges to prevent electrostatic discharge (ESD) damage to the internal circuitry.
Verify that the module is fully seated in the chassis slot and secured with the top and bottom retaining screws.
Use shielded twisted-pair cabling for thermocouple inputs to minimize electromagnetic interference (EMI).
Ensure proper grounding of the module chassis to a common ground bus to maintain signal integrity.
Avoid routing signal cables near high-voltage power lines or high-frequency switching equipment.
FAQ
What type of inputs does the 1746-NT8 support? This module supports multiple thermocouple types (J, K, T, E, R, S, B, N) as well as millivolt signals, making it versatile for various temperature and low-voltage sensing tasks.
Is this module compatible with all SLC 500 processors? The 1746-NT8 is designed for the SLC 500 system; however, please verify your specific processor firmware and backplane power supply capacity to ensure compatibility with the module's load.
