Machine Safety Solution – Allen-Bradley 1791DS-IB8XOB8 | 1791DS Series
The Allen-Bradley 1791DS-IB8XOB8 is a compact Safety Digital I/O module designed for DeviceNet Safety networks. With 8 safety-rated digital inputs and 8 digital outputs in a single housing, it delivers SIL 2 / PLd-rated safety I/O for machine guarding, emergency stop, and light curtain integration — without the bulk of a traditional safety relay panel.
Where This Product Is Used
- Machine Guarding & Light Curtain Integration — Connects OSSD-output safety light curtains directly to the DeviceNet Safety network, enabling zone-based access control on stamping presses, robotic cells, and packaging lines.
- Emergency Stop (E-Stop) Circuits — Monitors dual-channel E-stop buttons and safety rope pulls across conveyor systems and automated assembly stations, with on-board cross-fault detection.
- Safety Gate & Interlock Monitoring — Reads safety door switches and interlocks on CNC machining centers and injection molding machines, triggering controlled stops via the output channels.
- Two-Hand Control Stations — Validates simultaneous actuation timing for press brake and hydraulic press applications, meeting EN 574 Type IIIC requirements.
- Palletizer & Material Handling Safety Zones — Manages multiple safety zones on high-speed palletizers, stretch wrappers, and AGV crossing points within a single compact module.
- Automotive Body-in-White Welding Lines — Integrates with safety PLCs (GuardLogix) to enforce safe-state conditions during fixture loading and robot teach modes.
Technical Specifications
- Part Number / SKU: 1791DS-IB8XOB8
- Series: 1791DS (ArmorBlock Guard I/O)
- Manufacturer: Allen-Bradley / Rockwell Automation
- Network Protocol: DeviceNet Safety (CIP Safety)
- Safety Inputs: 8 × dual-channel safety digital inputs (24 V DC)
- Safety Outputs: 8 × solid-state safety digital outputs (24 V DC, 0.5 A per output)
- Safety Integrity Level: SIL 2 (IEC 62061), PLd Cat. 3 (ISO 13849-1)
- Housing: IP67-rated ArmorBlock (sealed, no enclosure required)
- Supply Voltage: 24 V DC (±10%)
- Operating Temperature: 0 °C to +55 °C
- Certifications: UL, CE, TÜV, cUL
- Mounting: DIN rail or panel mount via M12 connectors
- Weight: ~500 g
- Catalog Number: 1791DS-IB8XOB8
Why Engineers Specify This Model
- Distributed Safety I/O at the Machine — IP67 ArmorBlock housing eliminates the need for a control cabinet at each safety zone, reducing wiring costs by up to 60% versus traditional hardwired safety relays.
- Single Module, Dual Function — Combining 8 inputs and 8 outputs in one unit simplifies BOM and reduces panel footprint compared to separate input/output modules.
- Native CIP Safety Integration — Plug-and-play with GuardLogix and Compact GuardLogix safety PLCs; safety data is transported over the same DeviceNet cable as standard I/O, no separate safety bus required.
- On-Board Diagnostics — Per-channel fault detection and status LEDs accelerate troubleshooting and minimize unplanned downtime.
- Proven Rockwell Ecosystem — Fully supported in Studio 5000 Logix Designer with pre-built Add-On Instructions (AOIs) for rapid safety program development.
Complete System Bill of Materials
- 1791DS-IB8XOB8 — Safety Digital I/O Module (this item)
- 1756-L73S / 1756-L72S — GuardLogix Safety Controller (ControlLogix platform)
- 1788-DN2DN — DeviceNet Scanner Module
- 1485C-P1A50 — DeviceNet Thick Cable (per meter)
- 1485T-P2T5-T5 — DeviceNet T-Port Tap
- 440G-MT47280 — TLS-GD2 Safety Gate Switch (compatible input device)
- 800FM-MT44 — Mushroom-Head E-Stop Push Button (compatible input device)
- 1606-XLP72E — 24 V DC Power Supply, 3 A
Compliance & Industry Standards
- IEC 62061 — Safety Integrity Level SIL 2
- ISO 13849-1 — Performance Level PLd, Category 3
- IEC 61508 — Functional Safety of E/E/PE Safety-Related Systems
- EN ISO 13849-1:2015 — Machine Safety
- UL 508 — Industrial Control Equipment
- CE Marking — EMC Directive 2014/30/EU & Low Voltage Directive 2014/35/EU
- TÜV Rheinland Certified
- RoHS Compliant
Quality Assurance & Sourcing
Every 1791DS-IB8XOB8 unit shipped by Konmask.com undergoes the following verification process:
- Visual inspection against Rockwell Automation OEM packaging standards
- Label and date-code authentication
- Functional power-on test where applicable
- Sourced from authorized distributors, certified resellers, or verified surplus channels with full traceability documentation
- Shipped with anti-static packaging and moisture barrier protection
We maintain strict supplier qualification standards to ensure authenticity and reliability for safety-critical applications.
How to Source This Part
- Request a Quote: Email support@konmask.com with your required quantity and delivery timeline.
- Phone / WhatsApp: +0086 19859288691 (Mon–Fri, 09:00–18:00 CST)
- Lead Time: In-stock units ship within 1–3 business days; sourced units typically 5–15 business days.
- MOQ: 1 unit
- Payment: T/T, PayPal, credit card, and trade assurance accepted.
- Export: Worldwide shipping with DHL, FedEx, UPS, and sea freight options.
Application-Specific FAQ
Q: Can the 1791DS-IB8XOB8 be used with a standard (non-safety) DeviceNet scanner?
A: No. CIP Safety data requires a safety-rated scanner such as the 1788-DN2DN or a GuardLogix controller with an integrated DeviceNet Safety port. Standard scanners cannot process safety data objects.
Q: Is this module suitable for SIL 3 applications?
A: The 1791DS-IB8XOB8 is rated to SIL 2 / PLd. For SIL 3 requirements, consult Rockwell Automation for alternative architectures or redundant configurations.
Q: Can I mix safety and standard I/O on the same DeviceNet network?
A: Yes. CIP Safety is designed to coexist with standard CIP I/O on the same physical network. Safety data is logically separated and cannot be corrupted by standard nodes.
Q: What is the maximum cable length for DeviceNet with this module?
A: Per DeviceNet specification, thick cable supports up to 500 m trunk length at 125 kbps. Actual length depends on baud rate and network topology.
Q: Does Konmask.com provide a warranty on this part?
A: Yes. We offer a 90-day functional warranty on all units. Extended warranty and exchange programs are available upon request.
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Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
