Product Details
Product Overview
The Allen-Bradley 1756-OBV8S serves as a specialized 8-channel safety output module designed specifically for the ControlLogix 5580 and GuardLogix 5580 automation systems. Engineered for critical safety applications, this module delivers precise 10-30V DC output to control safety devices such as emergency stops, safety gates, and light curtains. It achieves high safety integrity levels, allowing engineers to integrate it seamlessly into safety circuits up to SIL 3 / PLe without the need for external safety relays. We supply this item as a 100% Brand New, factory-sealed unit.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Product Series | ControlLogix |
| Product Type | Safety Output Module |
| Number of Channels | 8 Safety Outputs |
| Output Voltage Range | 10 - 30V DC |
| Safety Rating | SIL 3 / PLe (when used in a safety system) |
| Connector Type | 20-Pin Removable Terminal Block |
| Backplane Current (5V DC) | 125 mA (Typical) |
| Backplane Current (24V DC) | 10 mA (Typical) |
| Operating Temperature | 0°C to 60°C (32°F to 140°F) |
Engineering Advantages
Integrated Safety Architecture
The 1756-OBV8S allows engineers to consolidate standard and safety control logic within a single ControlLogix chassis. By handling safety outputs directly through the PLC backplane, you eliminate the need for bulky, hard-wired external safety relay panels. This integration significantly reduces cabinet footprint, simplifies wiring, and streamlines troubleshooting through unified diagnostics in Studio 5000 Logix Designer.
Advanced Diagnostic and Fault Detection
Designed to meet rigorous functional safety standards, this module features comprehensive internal self-diagnostics. It continuously monitors for short circuits, open loads, and internal component failures. In the event of a detected fault, the module forces outputs to a safe state immediately, ensuring maximum personnel protection and minimizing unplanned machine downtime.
High-Density Safety Output Control
With 8 independent safety-rated output channels in a single module slot, the 1756-OBV8S maximizes I/O density. This high channel count is ideal for complex machinery requiring multiple safety zones, such as robotic cells with interlocked gates and emergency stop circuits, allowing for precise and segmented safety control strategies.
FAQs
Q: What safety integrity level does the 1756-OBV8S support?
A: When integrated correctly within a GuardLogix or ControlLogix safety system, this module supports safety applications up to SIL 3 (Safety Integrity Level 3) and PLe (Performance Level e), meeting the highest standards for industrial machine safety.
Q: Can I mix this safety module with standard ControlLogix I/O?
A: Yes, the 1756-OBV8S resides in the same ControlLogix chassis as standard I/O and communication modules. However, safety logic and safety I/O must be configured and handled within the safety partition of the controller.
Q: What is the output voltage range for this safety module?
A: The module provides discrete safety outputs with a voltage range of 10 to 30V DC, making it compatible with standard industrial 24V DC safety actuators, contactors, and signaling devices.
Q: Does this module require a specific terminal block?
A: Yes, the 1756-OBV8S uses a 20-pin removable terminal block (RTB) for field wiring. This allows for quick installation and easy replacement without the need to disconnect individual field wires.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Selecting the Right Cables for Industrial Automation: A Comprehensive Guide
Selecting the appropriate cabling infrastructure is critical for the success of any industrial automation project. Improper cable selection often leads to signal degradation, system instability, and costly downtime. As an automation engineer, I frequently see projects compromised by poor cabling choices in harsh industrial environments. This guide simplifies the complex landscape of cabling to help you make informed decisions for your PLC, DCS, and control systems.
Preventing Spurious Trips in Emergency Stop Systems: A Technical Guide
In industrial automation, the Emergency Stop (E-Stop) pushbutton is the ultimate safety line. However, relying on a single Normally-Closed (NC) contact can sometimes lead to unexpected spurious trips. As a control systems engineer, I have seen these nuisance trips halt entire production lines, causing significant downtime. Understanding why these components fail and how to implement robust architecture is essential for any reliable DCS or PLC-based safety system.
Sequencing Induction Motor Control with PLC Logic: Best Practices
In modern industrial automation, controlling a group of induction motors requires precision and safety. Uncontrolled simultaneous startup of multiple large motors often causes significant voltage dips, potentially triggering protective trips. Therefore, implementing a sequential startup and shutdown strategy is essential. This approach minimizes inrush current and ensures the system operates within established power constraints. A robust PLC program serves as the ideal engine for orchestrating these sequences.