Allen-Bradley 1734-OBV2S POINT Guard I/O Safety Output Module

Configured for safety-rated output control in distributed I/O systems, the Allen-Bradley 1734-OBV2S (1734-OBV2S Safety Output Module) provides direct physical/electrical execution of dual-channel bipolar output logic across CIP Safety networks.

Hardware Specifications

Profinet / EtherNet/IP Deterministic Networks

The 1734-OBV2S integrates into EtherNet/IP deterministic networks via the POINT I/O adapter, utilizing CIP Safety protocol to maintain system-wide safety integrity. The module architecture supports I/O density scaling by allowing localized safety logic execution, which minimizes wiring complexity and optimizes network bandwidth usage. Firmware flash compatibility is managed through the Studio 5000 Logix Designer environment, ensuring the module adheres to the required safety function versioning. The bipolar output configuration allows for both source and sink load management, providing the necessary diagnostic coverage for safety-rated actuators.

Frequently Asked Questions

Q: Can this module be hot-swapped while the backplane is powered?

A: The module supports removal and insertion under power (RIUP) only when the specific POINT I/O base is rated for hot-swapping. However, any safety-rated output will transition to a de-energized state upon module removal, necessitating a system-level reset of the safety controller.

Q: Is external feedback required for the bipolar outputs?

A: The 1734-OBV2S performs internal diagnostics on its bipolar output pairs to verify state transitions. External feedback loops are optional unless required by the specific safety function's risk assessment to achieve a higher Performance Level (PL) or Safety Integrity Level (SIL).

Field Installation Guidelines

1. Mount the 1734-OBV2S module onto a compatible POINT I/O terminal base; ensure the mechanical locking tab is fully engaged to maintain backplane communication.
2. Verify that the terminal base address and wiring configuration match the safety controller project mapping to prevent output mapping errors.
3. Use shielded cabling for all safety-rated output runs to mitigate electromagnetic interference and ensure the integrity of the diagnostic pulse signals.
4. Terminate the 24 VDC power supply to the appropriate terminals on the base, observing the required voltage range to ensure reliable switching performance.
5. Apply ferrules to stranded wires to ensure a secure, low-resistance connection within the spring-clamp or screw terminals.
6. Conduct a full system validation test, including all safety-rated output transitions, to verify proper operation within the defined safety logic prior to standard production cycles.