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1746-NT4
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Other Available Revisions for the 1746-NT4 1746-NT4//A1746-NT4//B
Common misspellings:
- l746-NT4
- 17A6-NT4
- 1746-NTA
- 1746NT4
The 1746-NT4 is a thermocouple/mV input module from Allen Bradley and is part of the SLC-500 series. It draws a backplane current of 60 mA and 40 mA at 5 and 24 Volts respectively. In addition to a CJC (Cold Junction Compensation) sensor, the 1746-NT4 has 4 thermocouple input types with a +/- 50 to +/- 100 mV voltage range. The 1746-NT4 features a filter frequency of 10 to 250 Hertz and has a step response time of 50 milliseconds at 60 Hertz. The available thermocouple input types are J, K, T, E, R, S, B, and N. It uses raw/proportional, engineering units, engineering units x 10 and scaled-for-PID data formats.
The 1746-NT4 has an auto calibration feature which calibrates the thermocouple module on every channel change or when a channel is enabled. The 1746-NT4 module has a transient 500 Volt DC separation on the inputs and the chassis ground. The overall module update time is dependent on the number of enabled channels and the CJC update duration.
Platinum, nickel, iron-nickel and copper RTDs can be interfaced with this module. It has a 0.80 Watt minimum/maximum thermal dissipation and a 16-bit resolution. When handling the 1746-NT4 make sure to have proper mechanisms in place to take care of electrostatic discharges. This may include wearing a standardized grounding wrist strap and avoiding the backplane connector pins by handling the 1746-NT4 module from the front.
The 1746-NT4 has a channel sampling time per channel of 12 milliseconds at 250 Hertz, 50 milliseconds at 60 Hertz, 60 milliseconds at 50 Hertz, and 300 milliseconds at 10 Hertz. The module also has a CJC update time of 14 milliseconds and is configured by entering the feeding values (bits) into output words 0 to 3 on channels 0 to 3 respectively.
Technical Specifications for 1746-NT4
| Manufacturer | Allen-Bradley / Rockwell Automation |
|---|---|
| Series | SLC 500 |
| Part Number | 1746-NT4 |
| Product Type | Thermocouple Input Module |
| Number of Inputs | 4 |
| Voltage Type | DC |
| Chassis Type | Modular or Fixed SLC 500 Chassis |
| Calibration | Automatic Self-Calibration |
| Operating Temperature | 32 to 140 degrees Fahrenheit |
| Storage Temperature | -40 to 185 degrees Fahrenheit |
About 1746-NT4
The 1746-NT4 module is an SLC 500 thermocouple input module from Allen-Bradley. It features 4 input channels. The 1746-NT4 thermocouple input module uses its image table to store analog data that has been digitally converted. This digitally converted data can be either thermocouple data or millivolt data. All of the modular SLC 500 processors and all of the fixed SLC 500 processors can access this digitally converted analog thermocouple and millivolt data for their applications. The 1746-NT4 thermocouple input module can support 1 to 4 millivolt or thermocouple analog sensors with its 4 inputs. This input module can be installed in both modular and fixed SLC 500 chassis. The fixed SLC 500 chassis can support up to 2 thermocouple input modules at a time. To determine whether a given modular chassis can support the 1746-NT4 module, calculate the total load that the chassis power supply will have to support with the thermocouple module and all the other devices that it is intended to host.
The Allen-Bradley SLC 500 1746-NT4 thermocouple input module should never be installed, removed, wired, or serviced while the power to the chassis is still connected and applied to it. It has a maximum backplane current consumption rating of 60 milliamps at 5 Volts DC backplane voltage and 40 milliamps at 24 Volts DC backplane voltage. The 1746-NT4 thermocouple input module calibrates itself automatically during the power up and also whenever a channel has been enabled. This module meets the CE, CSA, and cULus industrial standards, its operating temperature range is 32 to 140 degrees Fahrenheit, and its storage temperature range is -40 to 185 degrees Fahrenheit.
The Allen-Bradley 1746-NT4 input module from the SLC 500 series is a thermocouple input module with 4 inputs. It can store millivolt data and thermocouple data in its image table.
