Technical specifications, features, applications and purchasing information.
| Brand | Allen-Bradley |
| Model Number | 1746-NIO4V |
| Product Category | Analog I/O Module |
| Product Family | SLC 500 |
| Product Bulletin | Bulletin 1746 |
| Module Type | Combination Analog Input and Voltage Output Module |
| Total Analog Channels | 4 |
| Analog Input Channels | 2 |
| Analog Output Channels | 2 |
| Input Channel Configuration | Differential Voltage or Current, Selectable Per Channel |
| Input Signal Types | Analog Voltage and Analog Current |
| Normal Voltage Input Range | -10 to +10 VDC |
| Normal Current Input Range | -20 to +20 mA |
| Unipolar Input Applications | 0-10 VDC, 0-5 VDC, 1-5 VDC, 0-20 mA and 4-20 mA Within Supported Input Ranges |
| Input A/D Converter Resolution | 16-Bit |
| Input Conversion Method | Delta-Sigma Modulation |
| Voltage Input Resolution | 305.176 µV per LSB |
| Current Input Resolution | 1.22070 µA per LSB |
| Voltage Input Impedance | 1 MΩ |
| Current Input Impedance | 250 Ω |
| Absolute Maximum Current Input | -30 to +30 mA |
| Absolute Maximum Current Input Terminal Voltage | ±7.5 VDC or 7.5 VAC RMS |
| Voltage Input Coding | -32768 to +32767 for -10 to +10 VDC |
| Current Input Coding | -16384 to +16384 for -20 to +20 mA |
| Input Channel Repeatability | ±1 LSB |
| Input Nonlinearity | 0.01% |
| Input Channel Bandwidth | 10 Hz |
| Input Step Response | 60 ms to 95% |
| Typical Input Conversion Throughput | 512 µs |
| Voltage Input Overall Accuracy at 25°C | ±0.284% of Full Scale Maximum |
| Current Input Overall Accuracy at 25°C | ±0.365% of Full Scale Maximum |
| Output Signal Type | Analog Voltage Only |
| Normal Output Voltage Range | -10 to +10 VDC |
| Output D/A Converter Resolution | 14-Bit |
| Output Conversion Method | R-2R Ladder |
| Voltage Output Resolution | 1.22070 mV per LSB |
| Voltage Output Coding | -32768 to +32764 for -10 to +10 VDC |
| Voltage Output Nonlinearity | 0.05% |
| Output Step Response | 2.5 ms to 95% |
| Output Load Resistance | 1 kΩ to Infinite Resistance |
| Maximum Output Load Current | 10 mA |
| Maximum Output Load Reactance | 1 µF |
| Voltage Output Overall Accuracy at 25°C | ±0.208% of Full Scale Maximum |
| Voltage Output Overall Accuracy at 0-60°C | ±0.384% of Full Scale Maximum |
| Output Channels Individually Isolated | No |
| Input Channels Individually Isolated | No |
| Field Wiring to Backplane Isolation | 500 VDC |
| Module Update Time | 512 µs for All Channels in Parallel |
| SLC Communication Format | 16-Bit Two's Complement Binary |
| Backplane Current Draw at 5VDC | 55 mA Maximum |
| Backplane Current Draw at 24VDC | 115 mA Maximum |
| External 24VDC Power Supply | Not Required for Standard Module Operation |
| Input Range Selection | Hardware Switch Selection per Input Channel |
| Compatible PLC System | SLC 500 |
| Module Interface | Bulletin 1746 Backplane |
| Installation Location | Compatible Bulletin 1746 Chassis |
| Chassis Slot Requirement | One I/O Slot |
| Terminal Block | Removable |
| Recommended Analog Signal Cable | Shielded Belden 8761 or Equivalent |
| Maximum Field Wire Size | 14 AWG |
| Calibration | Factory Calibrated |
| Operating Temperature | 0°C to +60°C |
| Storage Temperature | -40°C to +85°C |
| Relative Humidity | 5-95% Non-Condensing |
| Industrial Noise Immunity Reference | NEMA ICS 2-230 |
| Product Lifecycle Status | Discontinued |
| Discontinuation Date | April 29, 2021 |
| Manufacturer Replacement Classification | Engineering Replacement |
| Manufacturer UPC | 662073735892 |
| Manufacturer Documentation | 1746-UM005 User Manual; 1746-IN008 Installation Instructions |
| Manufacturer Product Reference | Rockwell Automation 1746-NIO4V Product Details |
| Technical Reference Manual | Rockwell Automation SLC 500 4-Channel Analog I/O Modules User Manual |
The Allen-Bradley 1746-NIO4V combines two analog input channels and two analog voltage output channels in one SLC 500 module. This configuration enables compatible PLC systems to monitor analog process signals while generating voltage commands for industrial field devices.
Each differential analog input supports voltage or current signal selection. The documented full-scale ranges are -10 to +10 VDC and -20 to +20 mA, enabling suitable signal scaling for common process instrumentation, including 4-20 mA transmitters.
The analog inputs use 16-bit delta-sigma conversion, providing nominal resolutions of 305.176 µV per LSB for voltage measurements and 1.22070 µA per LSB for current measurements. This supports compatible process measurement and monitoring applications.
Two analog output channels provide -10 to +10 VDC signals using 14-bit digital-to-analog conversion. Their 1.22070 mV resolution and 2.5 ms step response to 95% support compatible variable frequency drive references and proportional control inputs.
The module occupies one compatible Bulletin 1746 chassis slot and communicates through the SLC 500 backplane. Its maximum backplane current requirements are 55 mA at 5 VDC and 115 mA at 24 VDC, which must be included in the chassis power budget.
A removable terminal block supports field wiring access. The module provides 500 VDC field-to-backplane isolation and is designed for 0°C to 60°C operation. Input and output channels are not individually isolated, so grounding and shielding practices are important for signal accuracy.
We support online purchase of the Allen-Bradley 1746-NIO4V Analog I/O Module. If you need to make bulk purchases and inquire about other products, please contact our team to inform us of your purchase requirements. We will provide you with information such as quantity quotations, delivery dates, and transportation methods.
What is Allen-Bradley 1746-NIO4V?
Allen-Bradley 1746-NIO4V is a four-channel combination analog I/O module for SLC 500 programmable controllers. It provides two differential analog inputs selectable for voltage or current signals and two bipolar analog voltage outputs.
How many analog input and output channels does 1746-NIO4V have?
The module includes two analog input channels and two analog output channels, for four total analog channels. Unlike a four-output-only module, the 1746-NIO4V supports both signal acquisition and analog output control in one chassis slot.
What input signal ranges does 1746-NIO4V support?
Each input channel can be configured for a normal voltage range of -10 to +10 VDC or a current range of -20 to +20 mA. Common narrower signal ranges can be interpreted through appropriate PLC scaling and wiring.
Can 1746-NIO4V read 4-20mA transmitters?
Yes. A 4-20 mA signal falls within the module's supported current input range. The input channel must be selected for current operation, wired according to the applicable transmitter configuration and scaled correctly in the SLC 500 program.
What output signal does 1746-NIO4V generate?
The two output channels generate analog voltage signals across a normal range of -10 to +10 VDC. The module does not provide analog current outputs. Applications requiring current output should use a compatible current-output module.
What is the difference between 1746-NIO4V and 1746-NIO4I?
Both modules provide two selectable voltage or current analog inputs. The 1746-NIO4V has two -10 to +10 VDC voltage outputs, while the 1746-NIO4I has two 0-20 mA current outputs. These output configurations are not interchangeable without evaluating the connected devices and PLC application.
What are the input and output resolutions?
The analog inputs use 16-bit conversion with nominal resolution of 305.176 µV per LSB in voltage mode or 1.22070 µA per LSB in current mode. The voltage outputs use 14-bit conversion with a nominal resolution of 1.22070 mV per LSB.
What are the analog voltage output load requirements?
The voltage outputs support load resistance from 1 kΩ upward, with a maximum output load current of 10 mA and maximum load reactance of 1 µF. The connected field equipment must remain within these electrical limits.
Does 1746-NIO4V require an external 24VDC power supply?
No separate external 24 VDC supply is specified for standard 1746-NIO4V module operation. It draws power from the compatible SLC 500 backplane, with maximum current requirements of 55 mA at 5 VDC and 115 mA at 24 VDC. Field instruments may require their own power supplies.
Are the analog channels individually isolated?
No. The two differential input channels and the two voltage output channels are not individually isolated. The module provides 500 VDC isolation between field wiring and the SLC backplane. Proper shielding, grounding and signal routing are important.
Is Allen-Bradley 1746-NIO4V discontinued?
Yes. Rockwell Automation lists the 1746-NIO4V as discontinued effective April 29, 2021, with an Engineering Replacement classification. A modernization project may require changes to controller hardware, wiring, analog scaling and programming rather than a direct module substitution.
What should be checked before ordering 1746-NIO4V?
Verify the exact catalog number 1746-NIO4V, SLC 500 chassis and processor compatibility, two input and two output channel configuration, voltage or current input switch settings, -10 to +10 VDC output requirements, 16-bit input and 14-bit output conversion, 5 VDC and 24 VDC backplane current budget, terminal block condition, analog wiring, grounding, signal scaling and the manufacturer's discontinued product status. Confirm the existing PLC program and slot assignment before replacing the module.
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| Brand | Allen-Bradley |
| Model Number | 1746-NIO4V |
| Product Category | Analog I/O Module |
| Product Family | SLC 500 |
| Product Bulletin | Bulletin 1746 |
| Module Type | Combination Analog Input and Voltage Output Module |
| Total Analog Channels | 4 |
| Analog Input Channels | 2 |
| Analog Output Channels | 2 |
| Input Channel Configuration | Differential Voltage or Current, Selectable Per Channel |
| Input Signal Types | Analog Voltage and Analog Current |
| Normal Voltage Input Range | -10 to +10 VDC |
| Normal Current Input Range | -20 to +20 mA |
| Unipolar Input Applications | 0-10 VDC, 0-5 VDC, 1-5 VDC, 0-20 mA and 4-20 mA Within Supported Input Ranges |
| Input A/D Converter Resolution | 16-Bit |
| Input Conversion Method | Delta-Sigma Modulation |
| Voltage Input Resolution | 305.176 µV per LSB |
| Current Input Resolution | 1.22070 µA per LSB |
| Voltage Input Impedance | 1 MΩ |
| Current Input Impedance | 250 Ω |
| Absolute Maximum Current Input | -30 to +30 mA |
| Absolute Maximum Current Input Terminal Voltage | ±7.5 VDC or 7.5 VAC RMS |
| Voltage Input Coding | -32768 to +32767 for -10 to +10 VDC |
| Current Input Coding | -16384 to +16384 for -20 to +20 mA |
| Input Channel Repeatability | ±1 LSB |
| Input Nonlinearity | 0.01% |
| Input Channel Bandwidth | 10 Hz |
| Input Step Response | 60 ms to 95% |
| Typical Input Conversion Throughput | 512 µs |
| Voltage Input Overall Accuracy at 25°C | ±0.284% of Full Scale Maximum |
| Current Input Overall Accuracy at 25°C | ±0.365% of Full Scale Maximum |
| Output Signal Type | Analog Voltage Only |
| Normal Output Voltage Range | -10 to +10 VDC |
| Output D/A Converter Resolution | 14-Bit |
| Output Conversion Method | R-2R Ladder |
| Voltage Output Resolution | 1.22070 mV per LSB |
| Voltage Output Coding | -32768 to +32764 for -10 to +10 VDC |
| Voltage Output Nonlinearity | 0.05% |
| Output Step Response | 2.5 ms to 95% |
| Output Load Resistance | 1 kΩ to Infinite Resistance |
| Maximum Output Load Current | 10 mA |
| Maximum Output Load Reactance | 1 µF |
| Voltage Output Overall Accuracy at 25°C | ±0.208% of Full Scale Maximum |
| Voltage Output Overall Accuracy at 0-60°C | ±0.384% of Full Scale Maximum |
| Output Channels Individually Isolated | No |
| Input Channels Individually Isolated | No |
| Field Wiring to Backplane Isolation | 500 VDC |
| Module Update Time | 512 µs for All Channels in Parallel |
| SLC Communication Format | 16-Bit Two's Complement Binary |
| Backplane Current Draw at 5VDC | 55 mA Maximum |
| Backplane Current Draw at 24VDC | 115 mA Maximum |
| External 24VDC Power Supply | Not Required for Standard Module Operation |
| Input Range Selection | Hardware Switch Selection per Input Channel |
| Compatible PLC System | SLC 500 |
| Module Interface | Bulletin 1746 Backplane |
| Installation Location | Compatible Bulletin 1746 Chassis |
| Chassis Slot Requirement | One I/O Slot |
| Terminal Block | Removable |
| Recommended Analog Signal Cable | Shielded Belden 8761 or Equivalent |
| Maximum Field Wire Size | 14 AWG |
| Calibration | Factory Calibrated |
| Operating Temperature | 0°C to +60°C |
| Storage Temperature | -40°C to +85°C |
| Relative Humidity | 5-95% Non-Condensing |
| Industrial Noise Immunity Reference | NEMA ICS 2-230 |
| Product Lifecycle Status | Discontinued |
| Discontinuation Date | April 29, 2021 |
| Manufacturer Replacement Classification | Engineering Replacement |
| Manufacturer UPC | 662073735892 |
| Manufacturer Documentation | 1746-UM005 User Manual; 1746-IN008 Installation Instructions |
| Manufacturer Product Reference | Rockwell Automation 1746-NIO4V Product Details |
| Technical Reference Manual | Rockwell Automation SLC 500 4-Channel Analog I/O Modules User Manual |
The Allen-Bradley 1746-NIO4V combines two analog input channels and two analog voltage output channels in one SLC 500 module. This configuration enables compatible PLC systems to monitor analog process signals while generating voltage commands for industrial field devices.
Each differential analog input supports voltage or current signal selection. The documented full-scale ranges are -10 to +10 VDC and -20 to +20 mA, enabling suitable signal scaling for common process instrumentation, including 4-20 mA transmitters.
The analog inputs use 16-bit delta-sigma conversion, providing nominal resolutions of 305.176 µV per LSB for voltage measurements and 1.22070 µA per LSB for current measurements. This supports compatible process measurement and monitoring applications.
Two analog output channels provide -10 to +10 VDC signals using 14-bit digital-to-analog conversion. Their 1.22070 mV resolution and 2.5 ms step response to 95% support compatible variable frequency drive references and proportional control inputs.
The module occupies one compatible Bulletin 1746 chassis slot and communicates through the SLC 500 backplane. Its maximum backplane current requirements are 55 mA at 5 VDC and 115 mA at 24 VDC, which must be included in the chassis power budget.
A removable terminal block supports field wiring access. The module provides 500 VDC field-to-backplane isolation and is designed for 0°C to 60°C operation. Input and output channels are not individually isolated, so grounding and shielding practices are important for signal accuracy.
We support online purchase of the Allen-Bradley 1746-NIO4V Analog I/O Module. If you need to make bulk purchases and inquire about other products, please contact our team to inform us of your purchase requirements. We will provide you with information such as quantity quotations, delivery dates, and transportation methods.
What is Allen-Bradley 1746-NIO4V?
Allen-Bradley 1746-NIO4V is a four-channel combination analog I/O module for SLC 500 programmable controllers. It provides two differential analog inputs selectable for voltage or current signals and two bipolar analog voltage outputs.
How many analog input and output channels does 1746-NIO4V have?
The module includes two analog input channels and two analog output channels, for four total analog channels. Unlike a four-output-only module, the 1746-NIO4V supports both signal acquisition and analog output control in one chassis slot.
What input signal ranges does 1746-NIO4V support?
Each input channel can be configured for a normal voltage range of -10 to +10 VDC or a current range of -20 to +20 mA. Common narrower signal ranges can be interpreted through appropriate PLC scaling and wiring.
Can 1746-NIO4V read 4-20mA transmitters?
Yes. A 4-20 mA signal falls within the module's supported current input range. The input channel must be selected for current operation, wired according to the applicable transmitter configuration and scaled correctly in the SLC 500 program.
What output signal does 1746-NIO4V generate?
The two output channels generate analog voltage signals across a normal range of -10 to +10 VDC. The module does not provide analog current outputs. Applications requiring current output should use a compatible current-output module.
What is the difference between 1746-NIO4V and 1746-NIO4I?
Both modules provide two selectable voltage or current analog inputs. The 1746-NIO4V has two -10 to +10 VDC voltage outputs, while the 1746-NIO4I has two 0-20 mA current outputs. These output configurations are not interchangeable without evaluating the connected devices and PLC application.
What are the input and output resolutions?
The analog inputs use 16-bit conversion with nominal resolution of 305.176 µV per LSB in voltage mode or 1.22070 µA per LSB in current mode. The voltage outputs use 14-bit conversion with a nominal resolution of 1.22070 mV per LSB.
What are the analog voltage output load requirements?
The voltage outputs support load resistance from 1 kΩ upward, with a maximum output load current of 10 mA and maximum load reactance of 1 µF. The connected field equipment must remain within these electrical limits.
Does 1746-NIO4V require an external 24VDC power supply?
No separate external 24 VDC supply is specified for standard 1746-NIO4V module operation. It draws power from the compatible SLC 500 backplane, with maximum current requirements of 55 mA at 5 VDC and 115 mA at 24 VDC. Field instruments may require their own power supplies.
Are the analog channels individually isolated?
No. The two differential input channels and the two voltage output channels are not individually isolated. The module provides 500 VDC isolation between field wiring and the SLC backplane. Proper shielding, grounding and signal routing are important.
Is Allen-Bradley 1746-NIO4V discontinued?
Yes. Rockwell Automation lists the 1746-NIO4V as discontinued effective April 29, 2021, with an Engineering Replacement classification. A modernization project may require changes to controller hardware, wiring, analog scaling and programming rather than a direct module substitution.
What should be checked before ordering 1746-NIO4V?
Verify the exact catalog number 1746-NIO4V, SLC 500 chassis and processor compatibility, two input and two output channel configuration, voltage or current input switch settings, -10 to +10 VDC output requirements, 16-bit input and 14-bit output conversion, 5 VDC and 24 VDC backplane current budget, terminal block condition, analog wiring, grounding, signal scaling and the manufacturer's discontinued product status. Confirm the existing PLC program and slot assignment before replacing the module.
