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- Allen Bradley
- 1734-OB8S
- Point I/O Module
- USA
- 77 × 25 × 55 mm
- 0.11kg
- Xiamen, China
- New & In Stock
- T/T, PayPal, Western Union
- 1 Year
- 1-3 Working Days
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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.
Brand new and original
Our products are imported in bulk from the place of origin. Because of the cooperative relationship, our products are all original and 100% new.
24-hour service
We provide 7*24 hours service to our customers. We will be there whenever you need us.
Price advantage
All our products are priced very favorably because we have our own warehouse and supply.
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Allen Bradley 1734-OB8S Detailed Technical Overview
1. Product Overview
The Allen Bradley 1734-OB8S is an 8-channel safety-rated digital DC output module designed for distributed industrial automation systems where functional safety is required. Unlike standard output modules, this model is specifically built to handle safety-critical control tasks, ensuring reliable shutdown and fault detection in hazardous situations.
It provides eight 24V DC sourcing outputs, capable of operating in both single-channel and dual-channel (redundant) configurations. This flexibility allows the module to meet different safety requirements depending on system design.
The module is typically installed on a DIN rail inside control cabinets and is used as part of a distributed safety I/O system, helping reduce wiring while improving system responsiveness and maintainability.
2. Brand and Series
- Brand: Allen Bradley
- Series: 1734 Series
- Platform: POINT I/O / Safety I/O
- Module Type: Safety Digital DC Output Module
This module belongs to the safety-oriented branch of distributed I/O systems, designed for applications where both control and protection must be integrated.
3. Technical Specifications
Parameter Table
| Parameter | Specification |
|---|---|
| Model | 1734-OB8S |
| Module Type | Safety Digital DC Output |
| Output Type | Sourcing (Solid-State) |
| Channels | 8 |
| Rated Voltage | 24V DC |
| Voltage Range | 19.2–28.8V DC |
| Output Current | 1 A per channel |
| Total Current | Up to 8 A (combined) |
| Protection | Electronic (short circuit, overload, cross-fault detection) |
| Response Time | ≤ 6 ms |
| Leakage Current | ≤ 0.5 mA |
| Isolation Voltage | 50V continuous |
| Bus Current | Approx. 120–180 mA @ 5V DC |
| Power Dissipation | Approx. 3–5 W |
| Mounting | DIN Rail |
| Operating Temperature | -20°C to +55°C |
| Storage Temperature | -40°C to +85°C |
| Protection Rating | IP20 |
| Dimensions | Approx. 77 × 25 × 55 mm |
| Weight | ≈ 0.11 kg ( 0.11 ) |
4. Product Features
The 1734-OB8S is designed for safety-critical environments and incorporates advanced diagnostic and protection capabilities.
- Eight independent safety-rated output channels
- Support for dual-channel redundancy configurations
- Built-in fault detection (short circuit, cross-circuit, overload)
- Pulse testing capability for wiring integrity monitoring
- Fast response time for emergency shutdown scenarios
- LED indicators for channel, module, and safety status
- Compact design suitable for high-density panel layouts
These features make the module highly reliable in systems where safety cannot be compromised.
5. Product Applications
The module is widely used in industrial environments that require functional safety and reliable shutdown control.
Typical applications include:
- Emergency stop (E-stop) systems
- Safety interlock circuits
- Machine guarding systems
- Conveyor safety control
- Robotic work cell safety systems
- Packaging and assembly equipment safety circuits
It is particularly suitable for systems that must comply with safety standards such as performance level or safety integrity level requirements.
6. Product Advantages
Safety Integration
Combines standard control functionality with safety-certified output control in a single module.
Redundant Control Capability
Supports dual-channel configurations for higher safety reliability.
Advanced Diagnostics
Detects wiring faults and abnormal conditions in real time, improving system safety.
Compact and Efficient
High channel count with safety functionality in a small footprint.
Reliable Performance
Stable operation with fast response ensures dependable protection in critical situations.
7. Recommended Models (Same Series or Related)
POINT I/O and Safety I/O Models
| Model | Type | Channels | Voltage | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| 1734-IB8S | Safety Digital Input | 8 | 24V DC | 77 × 25 × 55 | 0.11 ( 0.11 ) |
| 1734-OB8E | Protected DC Output | 8 | 24V DC | 75 × 12 × 56 | 0.05 ( 0.05 ) |
| 1734-OB4E | Protected DC Output | 4 | 24V DC | 75 × 12 × 56 | 0.04 ( 0.04 ) |
| 1734-OB2EP | Protected DC Output | 2 | 24V DC | 56 × 12 × 75 | 0.05 ( 0.05 ) |
| 1734-OW4 | Relay Output | 4 | AC/DC | 75 × 12 × 56 | 0.12 ( 0.12 ) |
These modules can be combined to create both standard and safety-oriented distributed I/O systems.
8. Recommended Popular Models (Same Brand)
Widely Used Industrial Modules
| Model | Type | Channels | Voltage | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| 1756-EN2T | Ethernet Communication | — | — | 145 × 140 × 35 | 0.45 ( 0.45 ) |
| 1756-IB16 | Digital Input | 16 | 24V DC | 145 × 140 × 35 | 0.40 ( 0.40 ) |
| 1756-OB16E | Digital Output | 16 | 24V DC | 145 × 140 × 35 | 0.42 ( 0.42 ) |
| 1769-IF4 | Analog Input | 4 | Analog | 118 × 87 × 35 | 0.30 ( 0.30 ) |
| 1769-OB16 | Digital Output | 16 | 24V DC | 118 × 87 × 35 | 0.30 ( 0.30 ) |