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- Allen Bradley
- 1746-NO8I
- PLC Module/Rack
- USA
- 145 × 35 × 130 mm
- 0.4kg
- Xiamen, China
- New & In Stock
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We have a 10-year logistics and express cooperation agreement, so our products can be shipped to any place in the world.
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Our products are imported in bulk from the place of origin. Because of the cooperative relationship, our products are all original and 100% new.
24-hour service
We provide 7*24 hours service to our customers. We will be there whenever you need us.
Price advantage
All our products are priced very favorably because we have our own warehouse and supply.
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Allen Bradley 1746-NO8I — Detailed Technical Overview
1. Product Introduction
The Allen Bradley 1746-NO8I is an analog current output module designed for integration within the SLC 500 PLC platform. It is used to convert digital values generated by the controller into proportional analog current signals for controlling field devices.
This module provides eight independent output channels, each capable of delivering standard industrial current signals such as 0–20 mA or 4–20 mA. These outputs are commonly used to drive control valves, variable frequency drives, actuators, and other process equipment.
The module is installed directly into the SLC 500 chassis and communicates with the processor through the backplane. Its design focuses on accuracy, fast response, and stable performance in industrial environments where reliable analog control is required.
2. Product Parameters
Technical Specifications
| Parameter | Value |
|---|---|
| Model | 1746-NO8I |
| Series | SLC 500 |
| Module Type | Analog Current Output Module |
| Number of Outputs | 8 |
| Output Signal Type | Current |
| Output Range | 0–20 mA / 4–20 mA |
| Maximum Output | Approx. 21–22 mA |
| Resolution | 16-bit |
| Output Accuracy | Approx. ±0.2–0.3% full scale |
| Load Resistance | Up to 500–750 Ω |
| Conversion Method | Digital to Analog (D/A) |
| Response Time | Approx. 1–5 ms |
| Update Time | Approx. 5–10 ms |
| Backplane Current (5V) | Approx. 120 mA |
| Backplane Current (24V) | Approx. 200–250 mA |
| Power Consumption | Approx. 5–7 W |
| Isolation | Electrical isolation (field to backplane) |
| Status Indicators | Channel LEDs + module LED |
| Operating Temperature | 0 to 60°C |
| Installation Type | Rack-mounted |
| Dimensions (mm) | 145 × 35 × 130 |
| Weight (kg) | 0.3 – 0.4 kg |
3. Product Applications
The 1746-NO8I is widely used in industrial systems that require precise analog current output control.
Typical applications include:
- Control of proportional valves and actuators
- Speed control of motors and drives
- Flow, pressure, and temperature control loops
- Chemical dosing and batching systems
- Process automation systems
- Industrial equipment requiring continuous analog control signals
Its use of current signals makes it especially suitable for long-distance transmission in electrically noisy environments.
4. Product Advantages
Multi-Channel Output Capability
Provides eight independent output channels, enabling control of multiple devices from a single module.
Standard Industrial Signal Support
Compatible with widely used 4–20 mA control systems.
High Output Resolution
16-bit resolution ensures smooth and precise analog signal control.
Fast Response Performance
Quick conversion and update times improve dynamic system response.
Strong Noise Immunity
Current signals are less affected by electrical interference compared to voltage signals.
Reliable Operation
Designed for stable and continuous use in industrial automation environments.
Easy Integration
Direct installation into SLC 500 racks simplifies system configuration.
5. Brand Information
Allen Bradley is widely known in industrial automation for producing PLC systems, I/O modules, and control components.
Its products are used across manufacturing, processing, and infrastructure industries due to their durability and consistent performance.
6. Product Series
- Series Name: SLC 500
- Category: Analog Output Module
The SLC 500 series is a modular PLC platform that supports digital, analog, and specialty modules. It provides flexible system expansion and reliable control for a wide range of industrial applications.
7. Recommended Models (Same Series / Related)
Related Models Table
| Model | Function | Channels | Signal Type | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| 1746-NO4I | Analog Output | 4 | Current | 145 × 35 × 130 | 0.3 kg |
| 1746-NO4V | Analog Output | 4 | Voltage | 145 × 35 × 130 | 0.3 kg |
| 1746-NIO4I | Analog I/O | 2 In / 2 Out | Current | 145 × 35 × 130 | 0.35 kg |
| 1746-NIO4V | Analog I/O | 2 In / 2 Out | Voltage | 145 × 35 × 130 | 0.35 kg |
| 1746-NI8 | Analog Input | 8 | Voltage/Current | 145 × 35 × 130 | 0.4 kg |
8. Recommended Popular Models (Same Brand)
Popular Models Table
| Model | Series | Function | Type | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| 1756-OF8 | ControlLogix | Analog Output | 8-channel | 140 × 112 × 145 | 0.6 kg |
| 1756-IF16 | ControlLogix | Analog Input | 16-channel | 140 × 112 × 145 | 0.6 kg |
| 1769-OF4 | CompactLogix | Analog Output | 4-channel | 118 × 87 × 140 | 0.5 kg |
| 1769-IF8 | CompactLogix | Analog Input | 8-channel | 118 × 87 × 140 | 0.5 kg |
| 1606-XLS240E | Power Supply | DIN Rail PSU | 24V DC | 123 × 50 × 125 | 0.8 kg |