Allen-Bradley 1734-OW2 POINT I/O Relay Output Module

The Allen-Bradley 1734-OW2, also cataloged as the 1734-OW2 Relay Output Module, operates as a dedicated hardware component for electromechanical contact switching within POINT I/O distributed control networks. The module provides two normally open Form A relay outputs, supporting field-side switching through electromechanical relay contacts while communicating through the POINTBus backplane architecture.

Hardware Specifications

POINTBus Communication and I/O Density Scaling

The 1734-OW2 exchanges output status data through the POINTBus backplane used by the POINT I/O platform. The module occupies a compact distributed I/O position while providing two independent relay channels. Integration with compatible POINT I/O communication adapters enables operation within EtherNet/IP and related distributed control architectures. Backplane communication supplies command data while field-side relay contacts perform electrical switching independently of the bus network.

Frequently Asked Questions

Q: Does the 1734-OW2 provide isolated relay outputs?
A: Yes. The relay contacts provide electrical isolation from the POINTBus electronics, with an isolation voltage rating of 250 V.

Q: What type of output contacts are used in the module?
A: The module contains two normally open Form A electromechanical relay outputs.

Q: Can the module be replaced while field wiring remains connected?
A: Field wiring practices depend on the terminal base assembly and plant maintenance procedures. Power should be removed and site lockout procedures followed before module replacement unless the installation documentation explicitly permits otherwise.

Field Installation Guidelines

• Install the module onto a properly secured POINT I/O DIN rail assembly.

• Verify compatibility between the connected load and the relay contact current rating before energizing the circuit.

• Route relay output conductors separately from low-level analog and communication cables to reduce electromagnetic interference.

• Use copper conductors within the specified wire size range and tighten terminals according to the applicable terminal base instructions.

• Provide external circuit protection appropriate for the connected load and supply voltage.

• Because the module is open-style, install it within a suitable industrial enclosure that provides environmental and electrical protection.

• Inspect relay-controlled loads for inrush current characteristics that may reduce contact service life.