
Product Overview
The Allen-Bradley 1738-AENT ArmorPoint EtherNet/IP Adapter is an industrial network communication module designed to connect ArmorPoint I/O modules to EtherNet/IP automation networks. It acts as a communication bridge between distributed I/O devices and PLC or control systems, enabling real-time data exchange in industrial automation environments.
Designed for rugged industrial applications, the 1738-AENT supports modular, scalable I/O architectures and is commonly used in distributed control systems where flexibility, compact installation, and reliable network communication are required.
Technical Specifications
| Parameter |
Details |
| Manufacturer |
Allen-Bradley |
| Model |
1738-AENT |
| Product Type |
ArmorPoint EtherNet/IP Adapter |
| Communication Protocol |
EtherNet/IP |
| Function |
I/O network adapter |
| Supported Modules |
Up to 63 ArmorPoint I/O modules |
| Network Connections |
Multiple EtherNet/IP connections |
| Power Supply |
24 V DC |
| Mounting Type |
On-machine / panel mounting |
| Backplane Current |
Approx. 1.0 A capacity (expandable with external supply) |
| Enclosure Rating |
IP65 / IP66 / IP67 |
| LED Indicators |
Network, module, and system status |
| Dimensions |
112 × 72 × 65 mm |
| Weight |
0.36 kg |
| Operating Temperature |
-20°C to 60°C |
| Application Environment |
Industrial automation systems |
Function and Working Principle
The 1738-AENT ArmorPoint Adapter functions as a central communication interface that links distributed ArmorPoint I/O modules to an EtherNet/IP network. It collects input and output data from connected modules and transmits this information to a PLC or industrial controller in real time.
It also distributes control commands from the controller back to field devices, enabling synchronized automation across machines and production lines.
This enables:
Reliable distributed I/O communication
Real-time industrial data exchange
Modular expansion of I/O systems
Reduced control cabinet wiring
Flexible machine-level automation architecture
Its rugged design allows direct installation on machines, making it suitable for harsh industrial environments.
Role in Industrial Control Systems
The 1738-AENT plays a key role in distributed automation systems, supporting:
EtherNet/IP-based industrial networks
Modular I/O expansion systems
Machine-level automation control
Manufacturing and process automation
Remote I/O architectures
Factory-wide control integration
It helps simplify system design while improving communication efficiency between field devices and controllers.
Industrial Applications
The Allen-Bradley 1738-AENT is widely used in:
Automotive manufacturing systems
Packaging machinery
Material handling systems
Conveyor automation
Robotic production cells
Factory automation networks
Process control systems
It is especially suitable for applications requiring flexible and scalable distributed I/O over EtherNet/IP networks.
Installation and System Integration
Proper installation ensures stable performance and communication reliability:
Mounted on machines or inside control panels
Connected via EtherNet/IP network infrastructure
Powered by 24 V DC supply
Integrated with ArmorPoint I/O modules
Requires proper network addressing and configuration
Should follow industrial installation standards for grounding and shielding
Correct setup ensures stable communication and reliable system performance.
Compatible System Components
The 1738-AENT typically works alongside:
Allen-Bradley ArmorPoint I/O modules
PLC systems (ControlLogix / CompactLogix)
EtherNet/IP industrial switches
Distributed automation systems
Industrial sensors and actuators
Machine control systems
These components together form a complete distributed industrial control architecture.
Recommended Alternative Models
| Model |
Type |
Key Feature |
Application |
| 1738-AENTR |
Dual-Port EtherNet/IP Adapter |
Network redundancy support |
Advanced automation |
| 1734-AENT |
POINT I/O Adapter |
Compact distributed I/O |
Small-scale systems |
| 1732E ArmorBlock Series |
Machine-mounted I/O |
Sealed rugged design |
Harsh environments |
| FLEX I/O EtherNet/IP Modules |
Modular I/O system |
Flexible configuration |
Industrial automation |
| ControlLogix I/O Adapters |
Centralized I/O system |
High-performance control |
Complex systems |
Key Advantages
Scalable distributed I/O architecture
Supports EtherNet/IP industrial networking
Rugged IP67-rated industrial design
Reduces control cabinet wiring complexity
Flexible modular expansion capability
Reliable machine-level installation
Technical FAQs
What is the main function of the 1738-AENT?
It connects ArmorPoint I/O modules to EtherNet/IP networks for industrial automation systems.
Where is it commonly used?
It is commonly used in manufacturing systems, machine automation, conveyor systems, and distributed control applications.
Why use a distributed I/O adapter?
It reduces wiring complexity, improves scalability, and allows I/O modules to be installed closer to machines.
Conclusion
The Allen-Bradley 1738-AENT ArmorPoint EtherNet/IP Adapter is a reliable industrial communication solution designed for distributed automation systems. Its modular architecture, rugged design, and EtherNet/IP connectivity make it suitable for demanding industrial environments requiring flexible and scalable I/O integration.
For engineers and system designers, it provides an efficient way to simplify wiring, improve system architecture, and maintain stable industrial communication across distributed control systems.