The Allen-Bradley 1734-ACNR, also cataloged as the 1734-ACNR Point I/O 24V DC ControlNet Adapter, operates as a dedicated hardware component for ControlNet network communication and POINTBus I/O data exchange within Allen-Bradley POINT I/O system platforms.

Model Identification and Configuration

The 1734-ACNR is a dual-media ControlNet adapter designed to connect POINT I/O modules to a ControlNet network infrastructure. The adapter provides communication between the ControlNet network and local POINTBus modules, supporting up to 63 POINT I/O modules within a single station.

The spare model reference includes 1734ACNR and 1734-ACNR/A versions. The unit requires 24 VDC field power and provides POINTBus current capacity for connected I/O assemblies.

Hardware Specifications

EtherNet/IP and Industrial Network Integration

The Allen-Bradley POINT I/O architecture uses distributed I/O communication technology to connect remote field devices with PLC control systems. The 1734-ACNR adapter provides ControlNet network access while maintaining local POINTBus communication with installed I/O modules.

The adapter supports I/O density scaling by allowing multiple POINT I/O modules to operate within a single remote station. System configuration requires matching the adapter revision, controller configuration, and network parameters to maintain deterministic ControlNet communication.

Firmware flash compatibility should be verified before replacement or system upgrades to ensure correct operation with the existing ControlNet infrastructure.

Ordering Information

• 1 x Allen-Bradley 1734-ACNR ControlNet Adapter
• 1 x POINT I/O communication adapter assembly
• Compatible POINT I/O terminal bases are ordered separately when required
• ControlNet network cables and connectors are supplied separately according to installation requirements

Field Installation Guidelines

Mechanical Installation

• Mount the adapter on a compatible DIN rail within the POINT I/O assembly.
• Ensure the adapter is correctly seated with adjacent terminal bases before applying power.
• Install the module in an enclosure suitable for the surrounding industrial environment.

Electrical and Network Installation

• Connect the 24 VDC power supply according to the system wiring design.
• Verify power supply capacity based on connected POINT I/O module load requirements.
• Route ControlNet communication cables separately from high-current power conductors.
• Apply proper cable shielding and grounding practices to reduce communication interference.
• Confirm network addressing and controller configuration before commissioning.

Frequently Asked Questions

• What network protocol does the 1734-ACNR use?

  The 1734-ACNR operates as a ControlNet adapter for communication between ControlNet networks and POINT I/O modules.

• How many POINT I/O modules can connect to this adapter?

  The adapter supports up to 63 POINT I/O modules within a single POINTBus I/O station configuration.

• What power supply does the 1734-ACNR require?

  The adapter requires a 24 VDC power source and has a specified power requirement of 425 mA.

• What is the POINTBus current capacity of this adapter?

  The adapter provides a POINTBus current capacity of 1000 mA for connected POINT I/O modules.

• Does the 1734-ACNR support DIN rail mounting?

  Yes. The adapter is designed for DIN rail mounting as part of the POINT I/O distributed I/O system.

• Is the 1734-ACNR a standalone controller module?

  No. The unit functions as a network communication adapter and requires POINT I/O modules for field signal processing.

• Can the adapter be replaced without configuration changes?

  Replacement requires verification of ControlNet addressing, module revision compatibility, and controller configuration parameters.

• What installation practice is recommended for ControlNet wiring?

  ControlNet cables should be routed separately from power wiring with correct shielding and grounding methods applied.