Ask our team:
  • Phone: +86 181 0690 9650
  • E-Mail sales1@apterpower.com

1746-NO8I

/ 4.9
1001 reviews | Need a Specific Revision?
The Allen-Bradley 1746-NO8I is an 8-channel analog current output module for SLC systems, used to convert control signals into standardized current outputs for driving and regulating industrial field devices.
Get a quick price for 1746-NO8I
Quantity
*E-mail
Company
*Mobile
*Content
Upload (gif, jpg, jpeg, png, bmp, doc, docx, xls, xlsx, ppt, pdf, csv)

Technical specifications for 1746-NO8I

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1746-NO8I
  • Product Family:
    SLC 500
  • Product Type:
    SLC 8 Point 20ma Output Module
  • Number of Outputs:
    8
  • Output Type:
    Current
  • Output Range:
    0 to 21.5 mA
  • Output Coding (proportional scaling):
    0 to 32,767
  • Output D/A Converter Resolution:
    16-bit, 366 nA/count
  • Non-Linearity:
    0.06% of full scale
  • DAC Conversion Method:
    R-2R Ladder Network
  • Output Step Response Time:
    1 ms (0 to 95% of full scale)
  • Load Range:
    0 to 500 ohm
  • Load Current:
    n/a
  • Load Reactance:
    1 µH (maximum
  • Output Impedance:
    Greater than 1M ohm
  • Over-Range Capability:
    7.5% (21.5mA)
  • Overall Accuracy:
    0.1% of full scale at 25°C, 0.2% of full scale at 60°C
  • Operating Temperature:
    0°C to +60°C (+32°F to +140°F)
  • Storage Temperature:
    -40°C to +85°C (-40°F to +185°F)
  • Operating Humidity:
    5 to 95% non-condensing
  • Vibration:
    Operating: 5.0G at 10 to 500Hz, One Octave/min sweep, 10 sweeps
  • Shock:
    Operating: 30G (3 pulses, 11 ms), Non-Operating: 50G (3 pulses, 11 ms)
  • Weight:
    0.26 kg
  • Estimated shipping dimensions:
    3.5x13x14.5cm
  • Tariff Code:
    8504402000
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen, Fujian, China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Specifications Control & Communication Use Cases Connectivity & Safety

Features:

  • Eight independently configurable current output channels enable flexible control of multiple field devices
  • High precision performance with 16-bit resolution and low non-linearity ensures accurate signal output
  • Robust industrial design with 500V isolation and wide environmental tolerance improves system reliability
The Allen-Bradley 1746-NO8I plays a critical role in industrial automation systems by converting digital control signals into precise analog current outputs. In applications such as process control, manufacturing, and energy systems, accurate current signals are essential for maintaining stability and efficiency. The module supports eight channels, allowing multiple devices to be controlled simultaneously without requiring additional hardware, which helps optimize system cost and cabinet space.

Functionally, the Allen-Bradley 1746-NO8I offers advanced output management capabilities including programmable scaling, output limits, and ramping control. These features allow engineers to fine-tune system behavior, ensuring smooth transitions and preventing sudden changes that could affect equipment performance. With software-based configuration, adjustments can be made quickly without physical modifications, improving commissioning efficiency and reducing downtime.

In practical deployment, the Allen-Bradley 1746-NO8I is widely used in environments where reliability and precision are essential. Its ability to withstand vibration, shock, and temperature variations makes it suitable for harsh industrial conditions. Combined with flexible power options and secure wiring via a removable terminal block, the module provides a dependable and adaptable solution for modern control systems.

The 1746-NO8I Allen-Bradley SLC 8 Point 20ma Output Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Allen-Bradley 1746-NO8I SLC 8 Point 20ma Output Module Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Allen-Bradley 1746-NO8I SLC 8 Point 20ma Output Module Specs

General

  • Manufacturer Allen-Bradley
  • Model 1746-NO8I
  • Condition New Original ready stock
  • Product Family 1746SC-NO8I,1746-NO8V,1746-NO8I/A
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
  • Signal Transmission: Converts PLC processor digital instructions into standard physical analog current signals via the backplane bus.
  • Mode Compatibility: Supports the traditional Class 1 simplified control bus protocol and the Class 3 extended mode, which transmits more interactive information.
  • Periodic Refresh: Maintains high-frequency active-end updates with the SLC 500 CPU, ensuring that channel data control logic is delivered in real time.
  • Remote Mapping: Can be used with remote Ethernet adapters such as the 1747-AENTR for distributed control node communication in a network architecture.
  • Proportional Valve Control: Provides uninterrupted 4-20mA current setpoint for pneumatic and electric regulating valves, precisely controlling pipeline fluid flow.
  • Variable Frequency Drive (VFD): Inputs the target speed signal to the current input terminal of the industrial VFD to dynamically adjust the speed of the main and auxiliary pumps and fans.
  • Actuator Positioning: Works with heavy-duty industrial servo mechanisms or electro-hydraulic actuators, achieving linear position and stroke control through milliampere signal output.
  • Instrument Cascading: Forwards process control variables calculated by the PLC to secondary recorders, panel displays, or third-party dedicated controllers.
  • Wiring Separation: Employs fully independent removable terminal blocks (RTBs) for quick replacement of spare parts without altering field wiring.
  • Safety Protection: Signals and internal backplane circuitry are opto-isolated to effectively prevent damage to the CPU from external field noise and high surges.
  • Wire Loss Retention: Allows configuration of a safety state during communication interruptions or PLC shutdowns, ensuring safe reset of process equipment in case of failure.
  • Cable Damping: The cable tie slot at the bottom of the module securely locks the wiring harness, preventing poor contact due to cabinet vibration during prolonged operation.
Description
The Allen-Bradley 1746-NO8I module provides eight independently configurable current output channels, making it well-suited for applications requiring accurate analog signal control. Each channel supports a 0 to 21.5 mA output range with proportional scaling up to 32,767 counts, ensuring fine control over process variables. With a 16-bit D/A converter using an R-2R ladder network, the module achieves a resolution of 366 nA per count, enabling precise signal adjustments in automation systems.

System integration is straightforward, as the 1746-NO8I can be installed in any 1746 chassis slot except slot 0. It consumes a maximum of 120 mA at 5V DC from the backplane, with typical power consumption of 5.6 W and thermal dissipation of 6.6 W. An optional external 24V DC Class 2 power supply can be used, selectable via the onboard jumper, allowing flexibility in system design and power distribution.

Performance stability is a key strength of the 1746-NO8I, maintaining overall accuracy of 0.1% at 25°C and 0.2% at 60°C. Non-linearity is limited to 0.06% of full scale, while output step response reaches 95% of full scale within 1 ms. The module supports a load range of 0 to 500 ohms and offers over-range capability up to 7.5%, ensuring reliable operation even under varying load conditions.

From a protection standpoint, the 1746-NO8I features 500V DC isolation between field wiring and the backplane, safeguarding the controller and system components. It operates reliably in industrial environments with temperatures from 0°C to 60°C and humidity levels between 5% and 95% non-condensing. The module also withstands vibration up to 5.0G and shock up to 30G during operation, ensuring durability in harsh conditions.

Advanced functionality enhances system flexibility, as the 1746-NO8I supports software configuration without DIP switches. Features such as channel ramping, output clamping, programmable limits, and selectable operating modes (Class 1 or Class 3) simplify programming and improve control accuracy. The removable terminal block supports secure wiring with recommended shielded twisted-pair cables such as Belden 8761, making installation and maintenance efficient.
Revisions

Revision Part #

Also known as

1746-NO8I Ser A
1746-NO8I/A, Series A, Rev A
Alternative Names
I746-NO8I 1746-N08I 1746NO8I I7A6-N0B1 1746SC-NO8I 1746-NO8V 1746-IV16 1746-OA16
Technical notes
The Allen-Bradley 1746-NO8I is an SLC 500 high-density analog output module delivering precision current control via 8 single-ended channels with 16-bit resolution across a 0 to 21.5 mA operational range.
Exceptional Service

Our Mission

  • 100% Satisfaction

    We believe expertise is priceless. With over 20 years of experience, and top engineers on staff, we can help you solve or avoid problems that threaten your business.
  • Trust Guaranteed

    Not only do we have a vast inventory, our team makes sure every piece of equipment is in working condition. Your purchases are also backed by our Warranty.
  • Expertise

    Time is money, especially when your equipment is down. We work quickly to get your equipment on its way so you can get it back up and running.

FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
What installation considerations apply to Allen-Bradley 1746-NO8I?
Allen-Bradley 1746-NO8I requires placement in any SLC chassis slot except slot 0 and supports optional external 24V DC power supply integration.
How does Allen-Bradley 1746-NO8I handle output transitions?
Allen-Bradley 1746-NO8I provides a 1 ms step response and supports programmable ramping for controlled output changes.
Why is isolation important in Allen-Bradley 1746-NO8I?
Allen-Bradley 1746-NO8I includes 500V DC isolation to protect the controller and chassis from electrical faults in field wiring.
How is Allen-Bradley 1746-NO8I configured in operation?
Allen-Bradley 1746-NO8I is fully configured via programming software, eliminating the need for DIP switches.