1746-NIO4V | Allen-Bradley SLC 500 Analog Module 2-Inputs 2-Voltage Outputs
1746-NIO4V | Allen-Bradley SLC 500 Analog Module 2-Inputs 2-Voltage Outputs
1746-NIO4V | Allen-Bradley SLC 500 Analog Module 2-Inputs 2-Voltage Outputs
    1746-NIO4V | Allen-Bradley SLC 500 Analog Module 2-Inputs 2-Voltage Outputs
1746-NIO4V | Allen-Bradley SLC 500 Analog Module 2-Inputs 2-Voltage Outputs

1746-NIO4V | Allen-Bradley SLC 500 Analog Module 2-Inputs 2-Voltage Outputs

Part #: 1746-NIO4V Manufactured by: Allen-Bradley
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$384.00
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$384.00
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Product Overview
The Allen-Bradley 1746-NIO4V is a SLC 500 Analog Combination Module. This Analog Combination Module has 2 Inputs and 2 Out...  Read more
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Product Description P/N: 1746-NIO4V

Description / Specifications

Description 

The Allen-Bradley 1746-NIO4V is an SLC500 analog combination module. This module features Two (2) differential, voltage or current selectable per channel with input signal ranges of -20 to +20 mA (or) -10 to +10V dc and Two (2) current outputs with signal range of 0 to +20 mA.

 

Technical Specifications 

Brand Allen-Bradley
Series SLC500
Part Number 1746-NIO4V
Manufacturer Rockwell Automation
Backplane Current at 24 Volts 115 mA
Backplane Current at 5.1 Volts 0.55 mA
Output voltage resolution 1.22070 mV per LSB
Output Voltage range -10 to +10 volts
No. of Outputs Two (2) non-isolated voltage outputs
Voltage input resolution 305.176 µV per LSB
Voltage Input range -10 to +10V dc - 1 LSB
Current input resolution 1.22070 µA per LSB
Current Input range -20 to 20 mA
No. of inputs Two (2) Differential Voltage / Current inputs
Module Type Analog combination module
Inputs 2
Outputs 2
Backplane Current (5 Volts) 55 milliamps
Backplane Current (24 Volts) 115 milliamps
Bandwidth 10 Hertz
Update Time 512 microseconds
Resolution 16 bits in, 14 bits out
Step Response 60 milliseconds in, 2.5 milliseconds out
Mounting Rack mount

  

 

Information About 1746-NIO4V

The 1746-NIO4V SLC 500 Analog Combination I/O Module by Allen-Bradley is an I/O module installed on the 1746 Chassis that has 2 user-selectable (per channel) current or voltage inputs and 2 voltage outputs. It has 2 current-loop inputs with a normal rating of -20 to 20mA at a 250 Ohm impedance and an input accuracy of +/- 0.642% at a drift rate of 79 ppm/5 degrees Celsius. Its two input points also have voltage ratings of -10 to 10 Volts DC with an impedance of 1M Ohm and a 10 Volt DC full-scale resolution of 305.176 ? V per LSB.

The voltage inputs have an accuracy of +/-0.504%, an overall drift accuracy of +/- 63 ppm/degree Celsius, and a maximum gain error of +/- 0.461%. The inputs have an offset error of +/- 14 LSB at 0 to 60 degrees Celsius, and the 1746-NIO4V maximum overvoltage protection across the input terminals comes in at either 220 Volts AC or 220 Volts DC. It uses the R-2R Ladder Digital-to-Analog Converter (DAC) with a converter resolution of 14 bits at its voltage output and a response time of 2 milliseconds. The output has a load range greater than 1KOhms with a load reactance of 1? F and an overall output range of -10 to 10 Volts. The voltage has an overall accuracy of +/- 0.384% of a 10 Volt DC full-scale voltage and a maximum drift accuracy of +/- 54 ppm per degree Celsius. The 1746-NIO4V also has a maximum gain error of +/- 0.374% with a drift error of ±47 ppm/ degree Celsius and an output offset error of +/-11 LSB. The 1746-NIO4V offers Field Wiring-to-Backplane Isolation at 500 Volts DC and uses the Shielded Belden #8761 recommended cable with a rated 14 AWG size.

The Allen-Bradley 1746-NIO4V is an analog I/O combination module. This module features Two (2) input channels and Two (2) output channels. The input channels features compatibility with differential voltage and current inputs that are individually configurable. For current input configuration, accepted signal range is -20 to +20 mA with a resolution of 16-bit with repeatability of ±1 LSB and non-linearity of 0.01%. It uses Delta-Signa modulation conversion method. When configured for voltage input, the accepted voltage signal range is -10 to +10V dc - 1 LSB with resolution of 305.176 µV per LSB.

The output channels of the 1746-NIO4V does not come with isolation. It can provide an output current range of 0-20 mA with resolution of 14-bit, using R-2R Ladder conversion method. It has a step response of 2.5 ms (at 95%).

This combination I/O module has a backplane current draw of 55 mA at 5.1 VDC and 145 mA at 24VDC. It occupies single slot of the chassis and comes with a removable terminal block for terminating signal wires to and from the module.

Additionally, the 1746-NIO4V may become part of the CompactLogix and ControlLogix Programmable Automation Controllers (PAC), acting as a distributed I/O module.



Manufacturer information

Allen-Bradley, a brand of Rockwell Automation, specializes in manufacturing industrial automation equipment. The product range includes programmable logic controllers (PLCs), motion control systems, safety devices, motor control equipment, automation software, and HMI panels. Allen-Bradley products are known for their reliability and integration with other systems.

Frequently Asked Questions about 1746-NIO4V
Question: What type of input signals does the 1746-NIO4V support?
Date Update:04/06/2025
Answer:

The module supports two differential analog inputs, which can be configured individually for either voltage or current. The voltage input range is -10 to +10 VDC with a resolution of 305.176 µV per LSB, while the current input range is -20 to +20 mA with a resolution of 1.2207 µA per LSB. This allows precise analog signal measurement for process control and monitoring applications. The inputs use Delta-Sigma modulation, offering high linearity and repeatability. Each input channel is designed for high-accuracy acquisition with overvoltage protection.

Question: Is the 1746-NIO4V module isolated?
Date Update:04/06/2025
Answer:

The input channels offer field wiring-to-backplane isolation of 500 VDC, providing electrical protection to the controller and improving noise immunity. However, the output channels are non-isolated, meaning caution must be taken when grounding and wiring outputs to avoid interference or ground loops. Proper shielding and wiring practices are essential when using non-isolated outputs. The isolation on the input side ensures safer signal acquisition from external analog devices. It allows the module to operate reliably even in electrically noisy environments.

Question: Can the 1746-NIO4V be used with CompactLogix or ControlLogix controllers?
Date Update:04/06/2025
Answer:

Yes, the 1746-NIO4V can be integrated into CompactLogix and ControlLogix systems when used as part of a distributed I/O setup via communication adapters. While it is not directly installed in these newer platforms, it can still function within hybrid architectures. This allows users to continue leveraging SLC 500 I/O modules while transitioning to modern PAC systems. It ensures investment protection for existing equipment while enhancing overall system capabilities. Communication bridging is typically required for full integration.

Question: What is the resolution and accuracy of the 1746-NIO4V inputs and outputs?
Date Update:04/06/2025
Answer:

The analog inputs offer a 16-bit resolution, while the outputs provide 14-bit resolution. The input voltage resolution is 305.176 µV per LSB, and current resolution is 1.2207 µA per LSB, allowing for very fine measurements. Input accuracy is rated at ±0.642% with drift characteristics of 79 ppm per 5°C, while output accuracy is ±0.384% of full scale. These specifications ensure that the module can deliver reliable and consistent analog data acquisition and control. It is well-suited for applications that require high precision over a wide temperature range.

Question: Is the 1746-NIO4V still being manufactured?
Date Update:04/06/2025
Answer:

No, the 1746-NIO4V has been discontinued by Rockwell Automation along with the SLC 500 series. While it is no longer in active production, it remains widely used in legacy systems and is still available through aftermarket and surplus channels. Rockwell Automation provides migration guidance toward CompactLogix or ControlLogix systems. Existing installations may continue to function reliably, but for long-term projects, newer platforms are recommended. Users are encouraged to plan for future replacements or upgrades.

IQElectro is not an authorized distributor.
IQElectro LLC (IQElectro) is NOT an Authorized Distributor or in any way affiliated with Rockwell Automation, Siemens, or any other Manufacturers. IQElectro is NOT an Authorized Dealer of this product. The product may be of older version, date codes, or design than that available from authorized dealers. As IQElectro is not an authorized dealer of this product, the Original Manufacturer's Warranty and Support DO NOT apply. IQElectro sells SURPLUS only and DOES NOT SELL SOFTWARE or FIRMWARE licenses For more detailed information, please refer to the full version of our disclaimer policy Disclaimer Policy.
Description / Specifications

Description 

The Allen-Bradley 1746-NIO4V is an SLC500 analog combination module. This module features Two (2) differential, voltage or current selectable per channel with input signal ranges of -20 to +20 mA (or) -10 to +10V dc and Two (2) current outputs with signal range of 0 to +20 mA.

 

Technical Specifications 

Brand Allen-Bradley
Series SLC500
Part Number 1746-NIO4V
Manufacturer Rockwell Automation
Backplane Current at 24 Volts 115 mA
Backplane Current at 5.1 Volts 0.55 mA
Output voltage resolution 1.22070 mV per LSB
Output Voltage range -10 to +10 volts
No. of Outputs Two (2) non-isolated voltage outputs
Voltage input resolution 305.176 µV per LSB
Voltage Input range -10 to +10V dc - 1 LSB
Current input resolution 1.22070 µA per LSB
Current Input range -20 to 20 mA
No. of inputs Two (2) Differential Voltage / Current inputs
Module Type Analog combination module
Inputs 2
Outputs 2
Backplane Current (5 Volts) 55 milliamps
Backplane Current (24 Volts) 115 milliamps
Bandwidth 10 Hertz
Update Time 512 microseconds
Resolution 16 bits in, 14 bits out
Step Response 60 milliseconds in, 2.5 milliseconds out
Mounting Rack mount

  

 

Information About 1746-NIO4V

The 1746-NIO4V SLC 500 Analog Combination I/O Module by Allen-Bradley is an I/O module installed on the 1746 Chassis that has 2 user-selectable (per channel) current or voltage inputs and 2 voltage outputs. It has 2 current-loop inputs with a normal rating of -20 to 20mA at a 250 Ohm impedance and an input accuracy of +/- 0.642% at a drift rate of 79 ppm/5 degrees Celsius. Its two input points also have voltage ratings of -10 to 10 Volts DC with an impedance of 1M Ohm and a 10 Volt DC full-scale resolution of 305.176 ? V per LSB.

The voltage inputs have an accuracy of +/-0.504%, an overall drift accuracy of +/- 63 ppm/degree Celsius, and a maximum gain error of +/- 0.461%. The inputs have an offset error of +/- 14 LSB at 0 to 60 degrees Celsius, and the 1746-NIO4V maximum overvoltage protection across the input terminals comes in at either 220 Volts AC or 220 Volts DC. It uses the R-2R Ladder Digital-to-Analog Converter (DAC) with a converter resolution of 14 bits at its voltage output and a response time of 2 milliseconds. The output has a load range greater than 1KOhms with a load reactance of 1? F and an overall output range of -10 to 10 Volts. The voltage has an overall accuracy of +/- 0.384% of a 10 Volt DC full-scale voltage and a maximum drift accuracy of +/- 54 ppm per degree Celsius. The 1746-NIO4V also has a maximum gain error of +/- 0.374% with a drift error of ±47 ppm/ degree Celsius and an output offset error of +/-11 LSB. The 1746-NIO4V offers Field Wiring-to-Backplane Isolation at 500 Volts DC and uses the Shielded Belden #8761 recommended cable with a rated 14 AWG size.

The Allen-Bradley 1746-NIO4V is an analog I/O combination module. This module features Two (2) input channels and Two (2) output channels. The input channels features compatibility with differential voltage and current inputs that are individually configurable. For current input configuration, accepted signal range is -20 to +20 mA with a resolution of 16-bit with repeatability of ±1 LSB and non-linearity of 0.01%. It uses Delta-Signa modulation conversion method. When configured for voltage input, the accepted voltage signal range is -10 to +10V dc - 1 LSB with resolution of 305.176 µV per LSB.

The output channels of the 1746-NIO4V does not come with isolation. It can provide an output current range of 0-20 mA with resolution of 14-bit, using R-2R Ladder conversion method. It has a step response of 2.5 ms (at 95%).

This combination I/O module has a backplane current draw of 55 mA at 5.1 VDC and 145 mA at 24VDC. It occupies single slot of the chassis and comes with a removable terminal block for terminating signal wires to and from the module.

Additionally, the 1746-NIO4V may become part of the CompactLogix and ControlLogix Programmable Automation Controllers (PAC), acting as a distributed I/O module.



Manufacturer information

Allen-Bradley, a brand of Rockwell Automation, specializes in manufacturing industrial automation equipment. The product range includes programmable logic controllers (PLCs), motion control systems, safety devices, motor control equipment, automation software, and HMI panels. Allen-Bradley products are known for their reliability and integration with other systems.

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