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1746-NI4

Original price was: $169.00.Current price is: $81.00.

The Allen-Bradley 1746-NI4 is a SLC 500 Analog I/O Module. This Analog I/O Module has Four (4) non-isolated differential, voltage or current selectable input channels. This module occupies single slot of the SLC 500 chassis and compatible with fixed or modular style hardware.

1746-NI4  Allen Bradely (Rockwell Automation)

Technical specifications for 1746-NI4

ManufacturerRockwell Automation
BrandAllen-Bradley
Part Number/Catalog No.1746-NI4
SeriesSLC 500
Module TypeAnalog I/O Module
Backplane Current (5 Volts)25 milliamps
Backplane Current (24 Volts DC)85 milliamps
Input signal Category-20 to +20 mA (or) -10 to +10V dc
Bandwidth10 Hertz
Current Input Coding-16,384 to +16,384
Update Time512 microseconds
Voltage Input Coding-32,768 to +32,767
Resolution16 bits
Chassis locationAny I/O module slot except slot 0
Step Response60 milliseconds
Backplane Current(5 Volts) 35 mA;(24 Volts DC) 85 mA
ApplicationsCombination 120 Volts AC I/O
Conversion typeDelta–Sigma Modulation
Cable Lengths0.5, 1, 2.5, or 5.0 meters.
Converter Resolution16 bit
UPC10662073735905
Repeatability±1 LSB
Non–linearity0.01%
UNSPSC32151705
Description

The Allen Bradley 1746-NI4 is an SLC 500 Four (4) Channel Analog Input Module. It has user-selectable analog channels for voltage or current to support multiple monitoring and control applications; it has a 16-bit resolution and contains a removable terminal block that provides connections analog input channel. This channel can be connected as a differential input. There is a DIP that switches on the circuit board to select the input or current voltage. The Backplane current at 5 Volts of this module is 25 mA; at 24 Volts, the current is 85 mA. Caution should be given to avoid connecting the voltage source without the transmitter current, etc. to the channel configured for current input. Incorrect module operation or module damage may occur.

The 1746-NI4 has Standard Cable Lengths of 0.5, 1, 2.5, and 5.0 meters. The AIFM Connector of this module is 15-pin D-shell. The Allen Bradley 1746-NI4 has Current Loop Input Specifications: the input range is +/-20 mA (nominal) and +/-30 mA (maximum). The Input impedance is 250 Ohms with a resolution of 1.22070 & µA per LSB and an approximate Gain error drift of +/-67 ppm/degrees Celsius. The overall accuracy at 25 degrees Celsius is +/- 0.365% of full scale, +/- 0.642% at 60 degrees Celsius. The overall accuracy drift is +79 ppm/degree Celsius of full scale. The 1746-NI4’s input voltage range is +/-10 Volts DC -1 LSB. Its impedance is 1 mega Ohms. The accuracy drift is +63 ppm/ degrees Celsius of full scale. The Resolution is 305.176 & µV per LSB, with a Gain error drift at +/- 57 ppm/degree Celsius. The Overall accuracy at 25 degrees Celsius is +/-0.284% of full scale, and +/-0.504% at 60 degrees Celsius.

The 1746-NI4 is an analog input module from the SLC 500 series of Allen-Bradley. It features Four (4) differential non-isolated input channels, individually selectable for voltage or current input. Selectable input signals ranges include -20 to +20 mA (or) -10 to +10V dc.

The module operates by converting the analog input signal via the Delta–Sigma Modulation with range of -16,384 to +16,384 for Current input and -32,768 to +32,767 for Voltage input. The converted data may be processed with the use of Scaling algorithm to display the measured process variable. Both method produces the same scaled output.

This module is compatible of being used with a fixed or modular hardware style SLC 500 controller. The Fixed hardware version of SLC 500 comes with embedded I/O channels with limited expansion capabilities. The modular hardware SLC 500 PLC features a fully modular and customizable system.

This module has built-in LED indicator for indicating the status of each channel and the overall status of the module’s operation. This provides quick module diagnostic which may also be accessed via the controller’s diagnostic interrupt. This system of reporting allows faster troubleshooting period and increases the availability of the module.

Revisions

Revision Part #Also known as
1746-NI4 Ser A1746-NI4/A, Series A, Rev A
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1746-NI4 Ser B1746-NI4/B, Series B, Rev B
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Alternative names

  • 1746-NIA
  • 1746NI4
  • 1746NIA
  • 1747-NI4
  • 17A6-NI4
  • 17A6-NIA
  • 17A6NI4
  • 17A6NIA
  • L746-NI4
  • L746NI4
  • L7A6-NIA
  • L7A6NIA

Frequently asked questions

How many inputs does this module have?

This module has four total inputs.

What is the bandwidth of the 1746-NI4?

The 1746-NI4 has a 10 Hertz bandwidth.

 

Troubleshooting

The 1746-NI4 is a multi-use analog module that provides both voltage and current reading for each individual channel


Individual card troubleshooting

  • Ensure the power light on the card comes on when inserted into the rack
  • Check dip switches to see that you are using the correct setting (current or voltage) for your application
  •  Visually inspect the card outside of the rack: check that resistors, capacitors, TRIACs and chips all look functional

In this demonstration of testing the 1746-NI4 we will be using the following parts

  • 1746-A7 (Rack)
  • 1747-L553 (processor)
  • 1746-P2 (power supply)
  • Variable voltage DC power supply

Test Voltage First:

  • Ensure that all dip switches are in the off position (as pictured)

Insert the card into the rack (we will be using slot 5)

1. Open a new project in RS-Logix 500 and select the processor that will be used.

2. Go into I/O configuration to read the 1747-NI4 in the back plane

NOTE: If the wrong processor has been selected from step 1, you will be asked to change the processor type. A window will appear and ask you to correct the problem, select “okay” to do so.

3. Download the program to the processor

4. Once online, go into the input table

This is where we will read our inputs changing when various voltages are applied

INPUT ranges are

Current: -20mA to +20mA

Voltage: -10vDC to +10vDC

Terminals for testing:

Positive terminals

  • 0
  • 3
  • 6
  • 9

Negative terminals:

  • 1
  • 4
  • 7
  • 10

5. Applying 5.33v to terminal 0 and 1 for testing input 1 We will get a reading around 17482    +- 100

6. Continue this process all the way down until input 3 has been reached


Testing with ANL COM

Apply the black lead (negative) to ANL COM

Now for each input apply the 5.33v to each positive input terminal

  • 0
  • 3
  • 6
  • 9

We will get a reading of 8735 +-100

testing current we will follow the same process except this time our dip switches on the side of the card will be in the on position (up instead  of down)

Each input reading will be similar to the last for both voltage and current testing

Technical notes

The Allen-Bradley 1746-NI4 is a SLC 500 Analog I/O Module. This Analog I/O Module has 4 Inputs and a Backplane Current (5 Volts) of 25 milliamps. It has a Bandwidth of 10 Hertz and an Update Time of 512 microseconds.

Documentation

RESOURCEPUBLICATION NUMBER
Installation Instructions1746-IN008
Weight0.5 kg
Dimensions10 × 10 × 10 cm

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1746-NI41746-NI4
Original price was: $169.00.Current price is: $81.00.