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- Allen Bradley
- 1794-AENT
- ControlNet Flex I/O Adapter Module
- USA
- 87 mm * 94mm * 92mm
- 2kg
- Xiamen, China
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Technical Report: FLEX I/O Ethernet/IP Adapter 1794-AENT
1. Product Overview
The 1794-AENT is a FLEX I/O Ethernet/IP communication adapter module used in distributed industrial automation systems. It provides a communication bridge between FLEX I/O terminal bases and an Ethernet/IP network, allowing PLC controllers to read and write field I/O data in real time.
It supports up to 8 FLEX I/O modules per node, enabling compact distributed I/O architectures with Ethernet-based networking.
This module is widely used as a standard remote I/O adapter in modern PLC systems.
2. Brand Information
- Brand: Industrial Automation Control Brand
- Product Category: FLEX I/O Communication Adapter
- Technology Field: Industrial Ethernet / EtherNet/IP Fieldbus Systems
- Manufacturing Origin: United States (varies by production batch)
3. Product Series
- Series Name: FLEX I/O Series
- System Architecture: Distributed modular I/O platform
- Network Type: EtherNet/IP industrial Ethernet
- Installation Type: DIN rail / panel-mounted system
The FLEX I/O family is designed for scalable distributed control and remote I/O integration.
4. Product Introduction
The 1794-AENT functions as an EtherNet/IP adapter node that connects FLEX I/O modules to PLC systems.
Key functions include:
- Ethernet/IP communication at 10/100 Mbps
- Support for up to 8 FLEX I/O modules
- Real-time cyclic I/O data exchange
- Remote I/O integration for PLC systems
- Network configuration via DHCP or hardware addressing
- RJ45 industrial Ethernet interface
It is commonly used in distributed control systems where Ethernet networking is preferred over legacy fieldbus protocols.
5. Technical Parameters
5.1 Communication Performance
| Parameter | Value |
|---|---|
| Communication Protocol | EtherNet/IP |
| Network Speed | 10/100 Mbps |
| Max I/O Modules | 8 modules per adapter |
| Network Interface | 1 × RJ45 Ethernet port |
| Topology | Linear / star |
| Addressing Method | DHCP or rotary switches |
| Cable Type | Cat5 / Cat5e shielded Ethernet cable |
5.2 Electrical Performance
| Parameter | Value |
|---|---|
| Input Voltage Range | 19.2–31.2 V DC |
| Nominal Voltage | 24 V DC |
| Backplane Output | 5 V DC (FlexBus supply) |
| FlexBus Current Capacity | up to 640 mA @ 5 V DC |
| Power Consumption | ~550 mA @ 24 V DC max |
| Power Dissipation | ~7.3 W |
| Isolation Voltage | ~50 V continuous (basic insulation) |
Reference data aligned with industrial FLEX I/O Ethernet adapter specifications
5.3 System Capability
| Parameter | Value |
|---|---|
| System Capacity | up to 8 FLEX I/O modules |
| Node Type | EtherNet/IP adapter node |
| Configuration Tool | PLC programming software |
| Network Role | Remote I/O interface |
| Compatibility | FLEX I/O terminal base system |
5.4 Physical Dimensions & Weight
| Parameter | Value |
|---|---|
| Height | 87 mm |
| Width | 94 mm |
| Depth | 92 mm |
| Mounting Type | DIN rail / panel mount |
| Weight | 0.227 kg – 2 kg (typical shipping ~0.23 kg net) |
| Form Factor | Single-slot Ethernet 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 (IEC tested) |
| Shock Resistance | up to 30G |
6. Product Applications
The 1794-AENT is widely used in Ethernet-based distributed automation systems.
Typical application areas:
- Automotive manufacturing lines
- Packaging machinery systems
- Conveyor and logistics systems
- Material handling automation
- Process control systems
- Machine cell distributed I/O
- Factory-wide Ethernet control systems
- Industrial robot peripheral control
Functional role:
- Ethernet/IP remote I/O gateway
- Distributed signal acquisition node
- PLC-to-field device communication interface
- Modular expansion controller for FLEX I/O systems
7. Product Advantages
7.1 Ethernet-Based Architecture
Provides fast and flexible industrial communication using standard Ethernet infrastructure.
7.2 High Expansion Capacity
Supports up to 8 FLEX I/O modules per adapter node.
7.3 Simplified Wiring
Reduces traditional fieldbus complexity with RJ45 Ethernet connectivity.
7.4 Real-Time Data Exchange
Supports cyclic I/O communication suitable for industrial control loops.
7.5 Easy Integration
Compatible with modern PLC systems using EtherNet/IP protocol.
7.6 Flexible Network Configuration
Supports DHCP and hardware addressing for quick deployment.
8. Recommended Models (Same Series / Related Modules)
8.1 FLEX I/O Ethernet / Fieldbus Adapters
| Model | Description | Key Parameters |
|---|---|---|
| 1794-AENTR | Dual-port EtherNet/IP adapter | Ring / DLR support |
| 1794-ACN | ControlNet adapter | 5 Mbps deterministic network |
| 1794-ACNR15 | Redundant ControlNet adapter | Dual-channel redundancy |
| 1794-ADN | DeviceNet adapter | CAN-based fieldbus |
| 1794-APB | PROFIBUS adapter | Up to 12 Mbps |
9. Recommended Models (Same Brand – Popular Modules)
| Model | Type | Key Parameters |
|---|---|---|
| 1756-EN2T | Ethernet communication module | ControlLogix network module |
| 1756-IB16 | Digital input module | 16-channel 24V DC input |
| 1756-OB16E | Digital output module | Electronic output switching |
| 1769-L33ER | PLC controller | CompactLogix CPU with Ethernet |
| 1769-PA4 | Power supply module | High-capacity AC/DC power supply |
10. Summary
The 1794-AENT is a core EtherNet/IP FLEX I/O adapter designed for distributed industrial automation systems.
Its Ethernet-based communication, modular expansion capability, and stable industrial performance make it a widely used solution for modern PLC remote I/O architectures.