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1746-NT4 Allen Bradley

Original price was: $279.00.Current price is: $181.00.

The Allen-Bradley 1746-NT4 is a SLC 500 Thermocouple/mV Analog Input Module. This module has Four (4) channels which are compatible for Thermocouple sensors such as J, K, T, E, S, R, B and N. It is also compatible for mV input such as +/- 50 mV and +/- 100 mV. This module is compatible for Fixed style and modular style SLC 500.

1746-NT4

Technical specifications for 1746-NT4

ManufacturerRockwell Automation
BrandAllen-Bradley
Part Number/Catalog No.1746-NT4
SeriesSLC 500
Inputs4
Module TypeThermocouple/mV Analog Input Module
Backplane Current (5 Volts)60 milliamps
No. of InputsFour (4)
Backplane Current (24 Volts)55 milliamps
Compatible Thermocouple SensorsJ, K, T, E, S, R, B and N
Update Time26 milliseconds-1.2 seconds
Compatible miliVolt signal+/- 50 mV and +/- 100 mV
Resolution16 bits in, 14 bits out
Backplane Current0.06 mA @ 5VDC; 0.04 mA @ 24VDC
Step Response60 milliseconds in, 2.5 milliseconds out
Backplane Power Consumption0.8W maximum (0.3W @ 5V dc, 0.5W @ 24V dc)
Channels4 backplane isolated
Open Circuit DetectionZero; Upscale; Downscale
UPC10662468165911
I/O Chassis locationAny slot except Slot 0
Operating Temperature0 to 60 degrees Celsius
Storage Temperature-40 to 85 degrees Celsius
A/D Conversion methodSigma-delta modulation

Description

The Allen Bradley 1746-NT4 is a Thermocouple/mV Input Module for an SLC 500 system. It provides all SLC 500 processors with a digitally converted thermocouple or millivolt (mV) analog data, received and stored in its image table. It does not require any external power supply as it receives 5 Volts DC and 24 Volts DC power from the SLC 500 power supply through its backplane. It has two cold-junction compensation (CJC) sensors instead of offset voltages to retain thermocouple input signal accuracy. Block transfers are required by this module in a remote I/O configuration. It interfaces to thermocouple types J, K, T, E, R, S, B, and N, and accepts direct +/-50 mV and +/-100 mV analog input signals. The 1746-NT4 module auto calibrates at power-up and whenever a channel is enabled. It has 5 green LED status indicators, one for module status and one for each of the four channels. The 1746-NT4 module has 4 backplane isolated input channels. It has a backplane current consumption of 60 mA at 5 Volts DC and 40 mA at 24 Volts DC. It has a backplane power consumption of 0.3 Watts at 5 Volts DC and 0.5 Watts at 2 Volts DC, a 16-bit converter resolution, and a 12 to 300 millisecond Step response at 95%. It has a bandwidth of 2.62 – 65.5 Hertz and a 26 millisecond – 1.2 second update period and uses sigma-delta modulation for A/D conversion. It can be installed in any slot except slot 0 of the SLC 500 chassis. It uses two wires per terminal with a maximum wire size of 2.5 millimeters (14 AWG) and 25 ohms maximum cable impedance. For Thermocouple inputs, use shielded twisted thermocouple extension wire; for mV inputs, Belden 8761 or equivalent wire must be used.

The 1746-NT4 is an Allen-Bradley module used with Thermocouple sensors and mV signals. This module belongs to analog input module category which belongs to the SLC 500 product family.

It features Eight (8) Thermocouple inputs with each channel supporting a wide variety of Thermocouple types such as J, K, T, E, S, R, B and N. Compatible mV signals include +/- 50 mV and +/- 100 mV. Each input channel is built with broken sensor detection may indicate a shorted or open circuit. There are configurable settings when an open circuit is detected such as Zero, Upscale and Downscale. When Zero is configured, the module’s reading is forced to Zero (0). When set to Downscale, the module’s reading is forced to the lowest reading while Upscale forces the reading to the maximum reading. These settings are helpful as it may be used to quickly diagnose the state of each channel aside from the visible LED indicators for each channel. The fault reaction settings must be based on the fail-safe operation of the process. Individual channel filters may also be set to fine tune the module’s behavior to input. Channel filters are set to minimize the effect of electrical noise and AC lines that may cause fluctuations and erratic readings. Selectable filter frequencies are 250 Hz which offers minimize noise filtering, 60 Hz, 50 Hz and 10 Hz noise filtering. If a Cold Junction Compensation (CJC) input is selected, input filter is ignored.

Revisions

Revision Part #Also known as
1746-NT4 Ser A1746-NT4/A, Series A, Rev A
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1746-NT4 Ser B1746-NT4/B, Series B, Rev B
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Alternative names

  • 1746-NTA
  • 1746NT4
  • 1746NTA
  • 1747-NT4
  • 17A6-NT4
  • 17A6-NTA
  • 17A6NT4
  • 17A6NTA
  • L746-NT4
  • L746NT4
  • L7A6-NTA
  • L7A6NTA
Frequently asked questions

How many inputs does this module have?

The 1746-NT4 has a total of four inputs.

What is this module’s resolution?

The 1746-NT4 has a resolution of 16 bits.

Technical notes

The Allen-Bradley 1746-NT4 is a SLC 500 Thermocouple/mV Analog Input Module. This Thermocouple/mV Analog Input Module has 4 Inputs and a Backplane Current (5 Volts) of 60 milliamps.

 

Weight0.25 kg
Dimensions15 × 15 × 5 cm

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1746-NT41746-NT4 Allen Bradley
Original price was: $279.00.Current price is: $181.00.