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- Allen Bradley
- 1794-OB8EPXT
- ControlNet Flex I/O Adapter Module
- USA
- 94 mm × 94 mm × 69 mm
- 0.3kg
- Xiamen, China
- New & In Stock
- T/T, PayPal, Western Union
- 1 Year
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- COO
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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.
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We provide 7*24 hours service to our customers. We will be there whenever you need us.
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All our products are priced very favorably because we have our own warehouse and supply.
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Allen-Bradley 1794-OB8EPXT Technical Overview and Engineering Guide
1. Product Introduction
The 1794-OB8EPXT is an extended temperature, electronically fused 8-channel digital DC output module designed for distributed industrial automation systems operating in harsh environments.
It belongs to the FLEX I/O-XT architecture, which is engineered for extreme environmental conditions while maintaining modular flexibility and compact design. The module provides 8 sourcing outputs at 24V DC with integrated electronic protection for each channel, allowing safe operation under overload or short-circuit conditions without external fusing.
This module is commonly used in remote I/O installations where reliability, temperature resistance, and compact footprint are critical design requirements.
2. Product Parameters
Electrical Specifications
| Parameter | Specification |
|---|---|
| Output Type | 8-point DC sourcing output |
| Rated Voltage | 24V DC nominal |
| Operating Voltage Range | 19.2–31.2V DC |
| Output Current per Channel | 2.0 A max |
| Output Current per Module | Up to 10.0 A (load dependent distribution) |
| Output Protection | Electronic fuse per channel |
| Surge Current | 4 A for 50 ms (repeatable every 3 s) |
| On-state Voltage Drop | ≤ 0.5 V DC |
| Off-state Leakage Current | ≤ 0.5 mA |
| Switching Delay | ~0.5 ms |
| FlexBus Current | ~73 mA @ 5V DC |
| Power Dissipation | ~5.5 W max |
| Thermal Dissipation | ~18.8 BTU/hr |
Mechanical Specifications
| Parameter | Specification |
|---|---|
| Dimensions (H × W × D) | 94 mm × 94 mm × 69 mm |
| Weight | ~0.1–0.3 kg |
| Mounting Type | DIN rail (FLEX I/O-XT terminal base system) |
| Compatible Bases | FLEX I/O-XT terminal bases |
| Wiring Method | Screw terminal connection |
| Status Indicators | 8 LED channel indicators |
Environmental Specifications
| Parameter | Specification |
|---|---|
| Operating Temperature | -20 °C to +70 °C |
| Storage Temperature | -40 °C to +85 °C |
| Humidity | 5–95% non-condensing |
| Protection Rating | IP20 system level, open-style module |
| Vibration Resistance | Industrial grade |
| Shock Resistance | Industrial grade |
3. Product Features
The 1794-OB8EPXT is designed for demanding industrial environments where both protection and temperature resilience are required.
- 8 independent DC output channels
- Extended temperature operation for harsh environments
- Built-in electronic fusing per channel
- High output current capacity (up to 2.0 A per channel)
- LED diagnostics for fast fault identification
- Compact modular design for distributed systems
- Hot-swappable capability in compatible FLEX I/O systems
- Stable operation under vibration and electrical noise conditions
Each channel operates independently, so a fault on one output does not necessarily affect the others, improving system reliability.
4. Product Applications
The module is widely used in industrial environments where standard I/O modules cannot meet temperature or durability requirements, such as:
- Oil and gas facilities
- Mining and heavy-duty machinery systems
- Outdoor automation control stations
- Power generation auxiliary control systems
- Process control systems in harsh environments
- Remote distributed I/O panels
- Heavy industrial manufacturing plants
- Transportation infrastructure automation systems
Its extended temperature capability makes it particularly suitable for installations without climate-controlled enclosures.
5. Product Advantages
- Extended temperature range (-20 to +70 °C) enables harsh environment use
- Integrated electronic fusing eliminates need for external protection devices
- High current output per channel improves load flexibility
- Compact 8-channel design reduces cabinet space requirements
- Fast switching response supports real-time control systems
- LED diagnostics simplify maintenance and troubleshooting
- Modular architecture allows easy system expansion
- High resistance to vibration and industrial electrical noise
6. Series and System Information
| Category | Description |
|---|---|
| Series | FLEX I/O-XT (Extreme Temperature Series) |
| System Type | Distributed modular I/O platform |
| Module Category | Digital DC output module (electronically fused) |
| Architecture | Remote I/O with terminal base system |
The FLEX I/O-XT series is designed specifically for environments where standard industrial modules may fail due to temperature extremes or harsh operating conditions.
7. Recommended Modules – Same Series or Related Models
| Model | Type | Function | Voltage | Weight (kg) | Dimensions |
|---|---|---|---|---|---|
| 1794-OB8EP | Electronically fused output module | 8-point DC output with protection | 24V DC | ~1.0 | 94×94×69 mm |
| 1794-IB8XT | Input module | 8-point extended temperature input | 24V DC | ~0.2 | 94×94×69 mm |
| 1794-OB16PXT | Protected output module | 16-point XT protected output | 24V DC | ~0.12 | 94×94×69 mm |
| 1794-IE8XT | Analog input module | 8-channel XT analog input | — | ~0.18 | 94×94×69 mm |
| 1794-OB16A | Standard output module | 16-point DC output | 24V DC | ~0.11 | 94×94×69 mm |
8. Recommended Popular Modules (Same Platform)
| Model | Type | Function | Voltage | Weight (kg) | Dimensions |
|---|---|---|---|---|---|
| 1756-OB16E | Control output module | High-performance 16-channel output | 24V DC | ~0.30 | 150×90×100 mm |
| 1756-IB16I | Control input module | 16-channel isolated input | 24V DC | ~0.30 | 150×90×100 mm |
| 1734-OB8 | Compact I/O output module | 8-channel distributed output | 24V DC | ~0.10 | 56×75×50 mm |
| 1769-IQ16 | Compact input module | 16-channel digital input | 24V DC | ~0.25 | 118×87×40 mm |
| 1769-OB16 | Compact output module | 16-channel digital output | 24V DC | ~0.25 | 118×87×40 mm |
9. Engineering Summary
The 1794-OB8EPXT is a ruggedized, electronically fused 8-channel output module designed for extreme industrial environments.
Its main strength lies in combining high output current capability, integrated protection, and extended temperature tolerance in a compact modular design.
Compared with standard FLEX I/O modules, it provides significantly improved environmental resilience and fault protection, making it suitable for mission-critical distributed automation systems where downtime must be minimized even under harsh conditions.