The Allen Bradley SLC 500 4-Channel Analog Input Module 1746-NI4 contains 4 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 single or 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, and ±0.642% at 60 degrees Celsius. The overall accuracy drift is +79 ppm/degree Celsius of full scale. The 1746-NI4 also Voltage input Specifications: the input range is ±10 Volts DC -1 LSB. Its impedance is 1 mOhms. 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.
FAQ for 1746-NI4
Question: How many inputs does this module have?
Answer: This module has four total inputs.
Question: What is the bandwidth of the 1746-NI4?
Answer: The 1746-NI4 has a 10 Hertz bandwidth.
Question: Can this module be purchased with a warranty?
Answer: Yes, the 1746-NI4 comes with a free one-year warranty from DO Supply, Inc.
Question: Where can I send the 1746-NI4 to be repaired?
Answer: DO Supply, Inc. offers a variety of repair services for the 1746-NI4.
Troubleshooting for 1746-NI4
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
Test Voltage First:
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:
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
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
Repair Services for 1746-NI4
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Our highly skilled technicians can repair your SLC 500 1746-NI4. All of our repairs come with a 1 Year Warranty. Please contact us for additional information.
Revisions for 1746-NI4
Please refer to the manual for more information about the 1746-NI4 such as the wiring diagrams, data sheets,
firmware information and migration or obsolescence details.