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- Allen Bradley
- 1794-ACN
- ControlNet Flex I/O Adapter Module
- USA
- 87.4 mm * 94 mm * 92 mm
- 0.29kg
- Xiamen, China
- New & In Stock
- T/T, PayPal, Western Union
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Technical Report: FLEX I/O ControlNet Adapter Module 1794-ACN
1. Product Overview
The 1794-ACN is a FLEX I/O ControlNet communication adapter module used in distributed industrial automation systems. It functions as a network interface between FLEX I/O terminal bases and a ControlNet control network.
This module allows a PLC or controller to communicate with distributed I/O blocks through a high-speed deterministic ControlNet fieldbus, enabling real-time data exchange for industrial process and machine control applications.
It supports up to 8 FLEX I/O modules per adapter, forming a compact distributed I/O station.
2. Brand Information
- Brand: Industrial Automation Control Brand
- Product Category: FLEX I/O Communication Adapter
- Technology Field: Industrial Fieldbus / ControlNet Networking
- Manufacturing Origin: United States (varies by production batch)
3. Product Series
- Series Name: FLEX I/O Series
- System Architecture: Distributed I/O platform
- Compatible Networks: ControlNet
- Installation Type: DIN rail / panel mounted modular system
The FLEX I/O system is designed for distributed control applications where remote I/O must be integrated into a centralized PLC architecture.
4. Product Introduction
The 1794-ACN serves as a ControlNet network adapter that connects FLEX I/O modules to a PLC scanner or controller over a deterministic network.
Key functions include:
- Network communication via ControlNet protocol
- Conversion of field I/O signals into network data
- Backplane power distribution for FLEX I/O modules
- Support for up to 8 I/O modules per node
It is commonly used in high-speed industrial automation systems requiring synchronized data exchange.
5. Technical Parameters
5.1 Communication Performance
| Parameter | Value |
|---|---|
| Communication Protocol | ControlNet |
| Network Speed | 5 Mbps |
| Max I/O Modules | 8 modules per adapter |
| Network Topology | Redundant or single media |
| Update Rate | Deterministic scheduled communication |
| Cable Type | RG-6 coaxial ControlNet cable |
5.2 Electrical Performance
| Parameter | Value |
|---|---|
| Input Voltage Range | 19.2–31.2V DC |
| Nominal Voltage | 24V DC |
| Backplane Output | 5V DC (FlexBus power) |
| FlexBus Output Current | 640 mA max @ 5V DC |
| Power Consumption | ~400 mA @ 24V DC |
| Power Dissipation | 4.6 W typical |
| Inrush Current | 23 A for 2 ms |
5.3 Isolation & Protection
| Parameter | Value |
|---|---|
| Isolation Voltage | 850 V DC (tested) |
| Isolation Type | Power to FlexBus / network isolation |
| Protection Class | Industrial reinforced design |
| Grounding Requirement | Protective earth required |
5.4 Physical Dimensions & Weight
| Parameter | Value |
|---|---|
| Height | 87.4 mm |
| Width | 94 mm |
| Depth | 92 mm |
| Mounting Type | DIN rail / panel mount |
| Weight | 0.20–0.29 kg (typical ~0.20 kg net, up to ~2 lb shipping variants) |
| Form Factor | Single FLEX I/O adapter module |
5.5 Environmental Conditions
| Parameter | Value |
|---|---|
| Operating Temperature | 0°C to 55°C |
| Storage Temperature | -40°C to 85°C |
| Humidity | 5%–95% non-condensing |
| Vibration Resistance | Industrial standard |
| Shock Resistance | Industrial standard |
6. Product Applications
The 1794-ACN is widely used in distributed control systems requiring ControlNet communication.
Typical application areas:
- Large-scale manufacturing lines
- Process automation systems
- Automotive production systems
- Conveyor and logistics systems
- Packaging machinery
- High-speed synchronized control systems
- Remote distributed I/O systems
- Machine cell automation
Functional role:
- ControlNet network interface
- Distributed I/O data aggregation
- Real-time deterministic communication
- Multi-module I/O expansion control
7. Product Advantages
7.1 Deterministic Communication
ControlNet ensures predictable and synchronized data transmission for real-time systems.
7.2 High Expansion Capability
Supports up to 8 FLEX I/O modules per adapter.
7.3 Stable Industrial Networking
Designed for noise-resistant and high-reliability industrial environments.
7.4 Flexible System Architecture
Supports both redundant and single-media network configurations.
7.5 Compact Distributed Design
Reduces cabinet wiring complexity by decentralizing I/O.
7.6 Easy Integration
Direct compatibility with FLEX I/O terminal bases simplifies system expansion.
8. Recommended Models (Same Series / Related Modules)
8.1 FLEX I/O ControlNet / Network Related Modules
| Model | Description | Key Parameters |
|---|---|---|
| 1794-ACNR | Redundant ControlNet adapter | Dual-channel redundancy support |
| 1794-AENTR | Ethernet/IP adapter module | Dual-port Ethernet communication |
| 1794-ADN | DeviceNet adapter module | 125–500 kbps fieldbus |
| 1794-ASB | Remote I/O adapter module | Legacy PLC remote I/O support |
| 1794-APB | PROFIBUS adapter module | Up to 12 Mbps communication |
9. Recommended Models (Same Brand – Popular Modules)
| Model | Type | Key Parameters |
|---|---|---|
| 1756-EN2T | Ethernet communication module | High-speed ControlLogix networking |
| 1756-IB16 | Digital input module | 16-channel 24V DC input |
| 1756-OB16E | Digital output module | Electronic sourcing outputs |
| 1769-L24ER | PLC controller | CompactLogix integrated CPU |
| 1769-PA4 | Power supply module | High-capacity AC power supply |
10. Summary
The 1794-ACN is a ControlNet-based FLEX I/O communication adapter designed for deterministic distributed control systems.
Its high-speed network capability, modular expansion support, and robust industrial design make it suitable for large-scale automation systems requiring synchronized real-time I/O communication.