Product Summary
The Allen-Bradley 1746-NT4 is a high-performance SLC 500 analog input module. It accurately converts four thermocouple or millivolt signals into digital data for your processor. This module supports sensor types J, K, T, E, S, R, B, and N. It also accepts ±50 mV and ±100 mV inputs. The module draws power directly from the SLC 500 backplane. You can install it in any chassis slot except slot zero. This design simplifies system integration and reduces wiring complexity.
Theme Option A: Product Procurement & Buyer Guide
Why Choose the 1746-NT4 for Your System
Procurement engineers need reliable components that meet strict specifications. The 1746-NT4 delivers exactly that for temperature monitoring applications. It provides four backplane-isolated input channels for thermocouple sensors. This isolation protects your control system from ground loops. The module uses two cold-junction compensation sensors for superior accuracy. You will not need external signal conditioners for most setups. This module reduces your total bill of materials significantly.
Technical Alignment for Application Engineers
Application engineers value the module’s flexible input configuration. Each channel supports eight different thermocouple types. You can mix J, K, T, and E sensors on a single module. The module also accepts direct millivolt signals from other transducers. This versatility makes it ideal for diverse industrial processes. The module auto-calibrates at power-up for consistent performance. You can trust the readings for critical temperature control loops.
Key Specifications for Your Procurement List
Check the module’s power requirements before ordering. The 1746-NT4 draws 60 mA at 5 Volts DC from the backplane. It also consumes 55 mA at 24 Volts DC. The total power consumption is just 0.8 Watts maximum. This low power budget saves energy in your control cabinet. The module operates in temperatures from 0 to 60 degrees Celsius. It stores safely between -40 and 85 degrees Celsius. These ratings suit most industrial environments perfectly.
Configurable Open Circuit Detection Features
The module includes built-in broken sensor detection for each channel. You can configure the response for open circuit conditions. Select Zero to force the reading to zero immediately. Choose Downscale for the lowest possible reading value. Pick Upscale for the maximum reading on that channel. These settings help you diagnose sensor faults quickly. The five green LED indicators provide instant visual status feedback.
Wiring and Installation Considerations
Use shielded twisted thermocouple extension wire for all thermocouple inputs. For millivolt inputs, use Belden 8761 or equivalent cable. The terminal accepts two wires up to 2.5 mm (14 AWG) in size. The maximum cable impedance is 25 ohms. This module requires block transfers in a remote I/O configuration. Plan your wiring carefully to maintain signal integrity and accuracy.
Logistics & Standard Packaging Details
- One (1) Allen-Bradley 1746-NT4 SLC 500 Thermocouple/mV Analog Input Module
- Product is individually packaged in an anti-static bag for safe transit.
- The module is ready for immediate installation into your SLC 500 chassis.
- Express delivery shipping is available via FedEx, UPS, and DHL for fast arrival.
