Allen-Bradley 1734-OB2E POINT I/O Digital Output Module

Configured for 24 VDC sourcing digital output signal control in EtherNet/IP deterministic networks, the Allen-Bradley 1734-OB2E (1734-OB2E VDC Logic I/O Module) provides direct physical/electrical execution.

Hardware Specifications

POINTBus Backplane Velocity and Deterministic Network Synchronization

• The Allen-Bradley 1734-OB2E integrates directly onto the POINTBus backplane, establishing high-speed serial backplane bus communication velocity across EtherNet/IP deterministic networks.
• Embedded firmware flash compatibility guarantees seamless cyclic status reporting and short-circuit fault diagnostic synchronization with the primary CompactLogix or ControlLogix CPU.
• Dual-channel electronically protected sourcing drivers isolate field load transients from backplane logic power, preserving signal integrity across high-density I/O drop configurations.

Frequently Asked Questions

Q: What is the backplane current draw for the 1734-OB2E module, and does it support hot-swapping under power?

A: The module draws approximately 75 mA from the 5 VDC POINTBus backplane. It supports Removal and Insertion Under Power (RIUP) when installed on a compatible 1734-TB or 1734-TBS wiring base, provided field power is safely isolated prior to removal.

Q: How does the electronic protection feature behave under an overcurrent or short-circuit condition on an output point?

A: The internal electronic protection automatically switches off the faulted sourcing channel when output current exceeds safe threshold limits, latching a diagnostic fault bit transmitted over the POINTBus to the controller without blowing internal physical fuses.

Field Installation Guidelines

Ensure the DIN-rail grounded backplane is connected to earth ground via a low-impedance copper strap adhering to standard industrial electrical practices. Mount the terminal base assembly securely on a standard 35 mm DIN rail prior to sliding the 1734-OB2E module into place. Maintain strict signal separation by routing 24 VDC field output wiring away from high-voltage AC lines or variable frequency drive load cables. When wiring field devices to the removable terminal block, verify proper wire strip lengths and terminal screw torque ratings to prevent loose contacts or intermittent field faults.