Stable Field Power Expansion for ArmorPOINT Distributed I/O Systems
The Allen Bradley 1738-EP24DC Extension Power Module is a dedicated field power expansion component designed for the ArmorPOINT I/O platform. It provides additional 24V DC field power distribution to downstream I/O modules, helping maintain stable system operation in large-scale distributed automation architectures.
Engineered for rugged industrial environments, the 1738-EP24DC enables segmentation of field power and logic power within ArmorPOINT systems, improving electrical stability, reducing voltage drop issues, and supporting scalable machine-mounted I/O deployments. Its compact sealed construction allows reliable operation directly on industrial equipment exposed to vibration, dust, and moisture.
This module is commonly used in decentralized EtherNet/IP automation systems where multiple ArmorPOINT modules require isolated or supplemental power distribution for stable long-distance field installations.
Technical Specifications
| Parameter | Specification |
|---|
| Manufacturer | Allen Bradley |
| Product Family | ArmorPOINT I/O |
| Model Number | 1738-EP24DC |
| Module Type | Extension Power Module |
| Input Voltage | 24V DC |
| Voltage Range | 10–28.8V DC |
| Field Power Output | 24V DC distribution |
| Current Capacity | Up to 10A field power |
| Isolation | Logic power and field power isolation |
| Power Consumption | Approx. 3–5 W |
| Mounting Type | ArmorPOINT machine-mount installation |
| Housing Protection | IP65 / IP66 / IP67 |
| Connector Type | Industrial sealed connectors |
| Operating Temperature | -20°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Shock Resistance | Industrial-rated |
| Vibration Resistance | Industrial-rated |
| Dimensions | Approx. 70 mm × 65 mm × 45 mm |
| Weight | Approx. 0.3–0.5 kg |
Applications
The 1738-EP24DC is widely used in distributed industrial automation systems requiring stable 24V DC field power expansion.
Typical applications include:
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Machine-mounted ArmorPOINT I/O systems
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Automotive assembly equipment
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Conveyor and material handling systems
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Packaging and labeling machinery
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Robotics and motion control systems
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Distributed EtherNet/IP architectures
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Industrial process automation systems
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Large-scale manufacturing lines
Its ability to isolate and extend field power makes it ideal for systems with multiple high-current I/O modules or long-distance installations.
Advantages
Reliable Field Power Distribution
Provides stable supplemental 24V DC field power to downstream ArmorPOINT modules for improved system reliability.
Reduced Voltage Drop
Helps maintain consistent operating voltage across extended distributed I/O systems.
Power Segmentation Capability
Separates field-side power from logic-side power, improving electrical protection and system stability.
Rugged Machine-Mount Design
Sealed industrial housing allows installation directly on machinery without requiring large protective cabinets.
Simplified System Expansion
Supports modular ArmorPOINT architecture for scalable automation system growth.
Harsh Environment Durability
Designed for industrial conditions involving vibration, dust, humidity, and temperature variation.
Technical FAQs
1. What is the primary function of the 1738-EP24DC?
It extends and distributes 24V DC field power within ArmorPOINT I/O systems.
2. What voltage does the module use?
It operates using a 24V DC industrial power supply.
3. Why is an extension power module needed?
It helps maintain stable voltage and separates field power in larger distributed I/O systems.
4. What is the maximum field current capacity?
The module supports up to approximately 10A field power distribution depending on system configuration.
5. Is the module suitable for machine-mounted installations?
Yes. It is specifically designed for on-machine ArmorPOINT applications.
6. What environmental protection ratings does it support?
The module supports IP65, IP66, and IP67-rated industrial protection.
7. Can it reduce voltage drop issues?
Yes. It helps stabilize voltage distribution across extended I/O installations.
8. What systems is it compatible with?
It is designed for Allen Bradley ArmorPOINT distributed I/O systems.
9. Does it provide electrical isolation?
Yes. It helps isolate field power from logic-side power distribution.
10. What industries commonly use the 1738-EP24DC?
Automotive, packaging, manufacturing, logistics, and industrial automation industries commonly use this module.
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