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Safety I/O Modules | Allen-Bradley 1791DS-IB8XOBV4
Safety I/O Modules | Allen-Bradley 1791DS-IB8XOBV4
Brand/Manufacturer: Allen-Bradley
Order Number: 1791DS-IB8XOBV4
Type: Safety I/O Modules
Country of Origin: USA
Condition: Original Brand
Lead Time: Available in stock
Payment Term: 100% TT In Advance
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Description
The 1791DS-IB8XOBV4 is a 24 VDC DeviceNet Safety combination I/O block in the Allen-Bradley CompactBlock Guard I/O family. Designed for distributed safety control applications, it integrates 8 safety inputs, 8 test pulse outputs, and 4 solid-state dual-channel bipolar safety outputs into a compact housing. The module communicates using the CIP Safety protocol over DeviceNet Safety networks to achieve SIL 3 (IEC 61508) and Category 4 / PLe (ISO 13849-1) compliance.
Safety Input and Bipolar Output Architecture
The input section of the 1791DS-IB8XOBV4 features 8 current-sinking safety inputs configurable for single- or dual-channel safety devices such as e-stops, safety switches, and light curtains. 8 dedicated test pulse outputs supply field contact power while injecting low-duration test pulses to detect short-circuits to 24 VDC and cross-faults. On the output side, 4 solid-state bipolar outputs pair current-sourcing (P-side) and current-sinking (M-side) switches per channel, providing short-circuit protection and reliable line fault detection for safety actuators.
DeviceNet Safety Communication and Field Setup
DeviceNet Safety integration enables seamless exchange of safety input/output status, configuration settings, and detailed diagnostic information over a single network trunkline. Safety Network Numbers (SNN) and node address assignments are configured using DeviceNet configuration tools or RSNetWorX for DeviceNet. The module mounts on a standard 35 mm DIN rail and features removable terminal blocks alongside front-panel LEDs for power, network status, module health, and individual channel status.
| Parameter | Specification |
|---|---|
| Model | 1791DS-IB8XOBV4 |
| Brand | Allen-Bradley / Rockwell Automation |
| Product Type | DeviceNet Safety CompactBlock I/O Module |
| Series | CompactBlock Guard I/O |
| Safety Level | SIL 3 (IEC 61508), PLe (ISO 13849-1), Cat 4 |
| Safety Inputs | 8 sinking inputs (24 VDC nominal) |
| Test Pulse Outputs | 8 test outputs |
| Safety Outputs | 4 solid-state dual-channel bipolar outputs |
| Communication Protocol | CIP Safety over DeviceNet |
| Operating Voltage | 24 VDC (11 to 28.8 VDC range) |
| Mounting Type | 35 mm DIN rail |
| Weight | 0.84 lbs (0.38 kg) |
Frequently Asked Questions
Q: How does the bipolar output configuration on the 1791DS-IB8XOBV4 protect output loads? A: Bipolar outputs control both the 24 VDC sourcing side and the 0 VDC sinking side of the load simultaneously. If a short circuit to power or ground occurs on either leg, the module opens the opposite side to safely interrupt power to the connected device.
Q: Can the 8 test outputs be used as standard control outputs? A: No, the 8 test pulse outputs are specifically designed to power safety field contacts and generate pulse signals for short-circuit detection; they cannot be used as general-purpose control outputs.
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Testimonials
Fast Delivery, Excellent Quality
We’ve worked with IndustriaX Limited on several urgent orders for automation components. Their ability to provide original, factory-sealed parts with full documentation—often from in-stock inventory—has significantly reduced our downtime. The delivery is consistently fast, and their logistics team is highly responsive. IndustriaX has become one of our most trusted global suppliers for industrial spare parts.
- Sarah Johnson
We’ve worked with IndustriaX Limited on several urgent orders for automation components. Their ability to provide original, factory-sealed parts with full documentation—often from in-stock inventory—has significantly reduced our downtime. The delivery is consistently fast, and their logistics team is highly responsive. IndustriaX has become one of our most trusted global suppliers for industrial spare parts.
- Sarah Johnson
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Finding authentic automation parts has always been a challenge, especially for discontinued models. IndustriaX Limited has impressed us with their genuine stock, clear product traceability, and prompt updates. We’ve verified their shipments against OEM specs multiple times, and the results are flawless. They’re now our preferred sourcing partner for critical systems.
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Finding authentic automation parts has always been a challenge, especially for discontinued models. IndustriaX Limited has impressed us with their genuine stock, clear product traceability, and prompt updates. We’ve verified their shipments against OEM specs multiple times, and the results are flawless. They’re now our preferred sourcing partner for critical systems.
- David Smith
Professional Service with After-Sales Support"IndustriaX Limited doesn’t just ship products—they provide solutions. When we encountered installation issues with one of the modules, their technical team replied in less than 4 hours and provided wiring guides and troubleshooting tips. This level of post-sale support is rare in the spare parts sector. Their professionalism gives us confidence in every order."
- Emily Brown
"IndustriaX Limited doesn’t just ship products—they provide solutions. When we encountered installation issues with one of the modules, their technical team replied in less than 4 hours and provided wiring guides and troubleshooting tips. This level of post-sale support is rare in the spare parts sector. Their professionalism gives us confidence in every order."
- Emily Brown
Trusted Source for Industrial Automation Spares
We've tested multiple suppliers over the years, but IndustriaX Limited consistently stands out. Their product catalog is extensive, their team is knowledgeable, and they understand the urgency of industrial needs. With every order, we receive timely updates, fast delivery, and 100% genuine products. It’s rare to find such consistency and reliability in this field.
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We've tested multiple suppliers over the years, but IndustriaX Limited consistently stands out. Their product catalog is extensive, their team is knowledgeable, and they understand the urgency of industrial needs. With every order, we receive timely updates, fast delivery, and 100% genuine products. It’s rare to find such consistency and reliability in this field.
- Michael Anderson