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1746-NO8V

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The Allen-Bradley 1746-NO8V delivers precise multi-channel voltage output within SLC systems, supporting demanding analog control tasks with high resolution and stability.
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Technical specifications for 1746-NO8V

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1746-NO8V
  • Product Family:
    SLC 500
  • Product Type:
    SLC 8 Point Analog Output Module
  • I/O Chassis Location:
    Any 1746 chassis slot except slot 0
  • Backplane Current Consumption (maximum):
    120 mA at 5V dc
  • Backplane Power Consumption (typical):
    5.6W
  • Optional External 24V dc Power Supply:
    +24V dc +/-10% (N.E.C. Class 2 required)
  • Number Of Channels:
    8 single-ended
  • Calibration:
    Factory calibrated
  • Thermal Dissipation:
    6.6W
  • Field Wiring to Backplane Isolation:
    500V dc
  • Recommended Cable:
    Belden 8761 (shielded, twisted-pair) or equivalent
  • Wire Size (maximum):
    Two 14 to 24 AWG wire per terminal
  • Number of Outputs:
    8
  • Output Type:
    Voltage
  • Output Range:
    ±10.25V dc
  • Output Coding (proportional scaling):
    -32,768 to +32,767
  • Output D/A Converter Resolution:
    16-bit, 320 µV/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:
    1K ohm and greater
  • Load Current:
    10 mA (maximum)
  • Load Reactance:
    1 µF (maximum)
  • Output Impedance:
    Less than 1.0 ohm
  • Over-Range Capability:
    2.5% (±10.25V)
  • 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 Use Cases Configuration Diagnostics

Features:

  • High-resolution 16-bit DAC enables precise voltage output control across all channels.
  • Fast 1 ms response time supports dynamic and real-time process adjustments.
  • Robust electrical isolation and industrial tolerance ensure reliable operation in harsh environments.
The Allen-Bradley 1746-NO8V plays a critical role in industrial automation systems where precise analog output signals are required to control actuators, drives, and other field devices. Voltage-based output modules like this are widely used in process industries such as chemical, oil and gas, and manufacturing, where accuracy directly affects product quality and operational efficiency. With eight independent channels, the module supports simultaneous multi-point control, reducing the need for additional hardware.

Functionally, the Allen-Bradley 1746-NO8V converts digital signals from the PLC into analog voltage outputs using a 16-bit D/A converter. This allows fine control over output signals, ensuring that connected equipment receives accurate and stable input. The module supports proportional scaling and maintains low non-linearity, making it suitable for applications requiring consistent signal integrity over time. The R-2R ladder architecture further enhances output stability.

From an application perspective, the Allen-Bradley 1746-NO8V fits well into systems requiring reliable analog output under varying environmental conditions. Its compatibility with standard SLC chassis and flexible installation options simplify system design. Combined with strong vibration and shock resistance, as well as support for shielded wiring, the module ensures dependable performance in demanding industrial environments where durability and precision are essential.

The 1746-NO8V Allen-Bradley SLC 8 Point Analog 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-NO8V SLC 8 Point Analog 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-NO8V SLC 8 Point Analog Output Module Specs

General

  • Manufacturer Allen-Bradley
  • Model 1746-NO8V
  • Condition New Original ready stock
  • Product Family 1746-NO8I,1746-NO8V/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.
  • Valve Control: Provides continuous electrical signals for proportional control valves and electro-hydraulic servo valves, achieving precise closed-loop linear control of flow and level.
  • Variable Frequency Drive (VFD): Remotely inputs voltage setpoints to various industrial VFDs to adjust the operating speed of large motors and pump sets.
  • Pressure Control: Widely used in hydraulic presses and injection molding equipment, controlling proportional pressure valves in hydraulic circuits by real-time correction of analog voltage.
  • Servo Positioning: Converts position commands calculated by the PLC into analog signals in real time and sends them to the servo driver to drive the actuator for precise positioning.
  • Slot Configuration: The module can be inserted into any standard SLC 500 rack slot except slot 0 (main CPU slot).
  • Format Selection: Supports both Class 1 (simple data) and Class 3 (extended data with status) operating formats.
  • Jump Settings: Features an onboard power selection jumper, allowing switching between internal backplane power supply and external 24V DC power supply as needed.
  • Software Adjustment: Independent data range configurations for each of the 8 channels can be performed directly in the I/O tree using RSLogix 500 or Studio 5000 software.
  • LED Status: The module panel is equipped with clear channel LEDs and a system OK indicator, providing real-time feedback on the operating status of individual channels and the overall system.
  • Fail-Safe: Allows users to preset channel outputs to zero or retain their last value when the PLC is in programming or communication interruption mode.
  • Overflow Monitoring: When used with Class 3 format, the system automatically reports diagnostic flags such as over-range and under-range readings in the backplane data words.
  • Status Inquiry: Engineers can extract underlying error codes transmitted from the baseboard in real time from the PLC controller's tags or data tables.
Description
The Allen-Bradley 1746-NO8V is an 8-point analog output module engineered for SLC 500 platforms, offering voltage-based signal control for industrial automation environments. Each of the eight single-ended channels provides scalable output from -32,768 to +32,767, enabling fine-tuned analog signal control. With a 16-bit D/A converter and a resolution of 320 µV per count, the module supports applications requiring accurate signal representation.

Integration flexibility allows the Allen-Bradley 1746-NO8V to be installed in any slot of a 1746 chassis except slot 0, ensuring compatibility with a wide range of system architectures. The module consumes up to 120 mA at 5V DC from the backplane and typically dissipates 5.6W of power, making it suitable for standard industrial enclosures. An optional external 24V DC power supply further enhances operational stability, especially in high-load configurations.

Signal performance is reinforced by low non-linearity of 0.06% of full scale and overall accuracy of 0.1% at 25°C, ensuring dependable analog output in process-critical environments. The R-2R ladder conversion method provides stable and repeatable voltage outputs, while a fast 1 ms step response supports responsive control loops. The Allen-Bradley 1746-NO8V also maintains output impedance below 1 ohm, allowing efficient signal transmission to connected devices.

Robust electrical and environmental characteristics make the Allen-Bradley 1746-NO8V suitable for industrial conditions. It offers 500V DC isolation between field wiring and the backplane, along with support for shielded twisted-pair cables such as Belden 8761. The module operates reliably within 0°C to 60°C and tolerates vibration up to 5.0G and shock conditions up to 30G during operation.
Revisions

Revision Part #

Also known as

1746-NO8V Ser A
1746-NO8V/A, Series A, Rev A
Alternative Names
1746-N08V 1746NO8V I746-NO8V I746NO8V 1746-NO8I 1746-OB8 1746-IV16 1746-IA16
Technical notes
The Allen-Bradley 1746-NO8V is an SLC 500 high-density analog output module featuring 8 single-ended voltage channels that deliver a ±10.25V DC range with 16-bit resolution for high-precision industrial process control.
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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 output range does Allen-Bradley 1746-NO8V support?
Allen-Bradley 1746-NO8V provides a voltage output range of ±10.25V DC with proportional scaling from -32,768 to +32,767.
How many channels are available on Allen-Bradley 1746-NO8V?
Allen-Bradley 1746-NO8V includes 8 single-ended analog output channels for multi-point control applications.
How does Allen-Bradley 1746-NO8V ensure output accuracy?
Allen-Bradley 1746-NO8V achieves 0.1% full-scale accuracy at 25°C using a 16-bit DAC and R-2R ladder conversion.
Why use an external power supply with Allen-Bradley 1746-NO8V?
Allen-Bradley 1746-NO8V benefits from a 24V DC external supply to stabilize output performance under higher load conditions.