Allen-Bradley 1734-ADNX Point I/O DeviceNet Subnet Expansion Adapter

The Allen-Bradley 1734-ADNX, also cataloged as the 1734-ADNX Network Adapter, operates as a dedicated hardware component for DeviceNet subnet expansion within Point I/O backplane structures. The unit bridges primary DeviceNet trunk lines to local Pointbus backplanes, coordinating I/O data processing across up to 63 expansion modules without active onboard software processing layers.

Hardware Specifications

Industrial Control & Backplane Communication Properties

As an integrated network interfacing unit within Allen-Bradley distributed control structures, the 1734-ADNX incorporates specialized communication execution capabilities:

• Profinet / EtherNet/IP Deterministic Networks: Functions as a gateway between trunk networks and local DeviceNet subnets, mapping I/O registers for deterministic data delivery across central PLC network architectures.
• Backplane Bus Communication Velocity: Manages high-speed Pointbus backplane traffic across up to 63 connected expansion cards, optimizing data scan throughput and minimizing I/O response latency.
• Firmware Flash Compatibility: Preserves network node addresses, baud rates, and subnet configuration profiles in non-volatile flash memory, maintaining operational continuity across system controller firmware flashing events.

Frequently Asked Questions

Q: What is the maximum number of I/O modules supported on the local Pointbus by the 1734-ADNX adapter?

A: The 1734-ADNX network adapter supports a maximum expansion capacity of up to 63 Point I/O modules on its local Pointbus backplane.

Q: What are the input power supply requirements for the 1734-ADNX backplane power rail?

A: The adapter requires an input supply rating of 400 mA @ 24 VDC to power the module circuitry and drive connected Pointbus backplane logic.

Field Installation Guidelines

Adherence to standard mechanical assembly and grounding protocols is required to preserve network stability and physical module mounting:

• DIN Rail Mounting and Mechanical Assembly: Mount the adapter on a standard 35 mm DIN rail. Securely lock the side mounting latches into place before inserting adjoining 1734 terminal base units to maintain mechanical rigidity.
• Network Wiring and Shielding: Connect DeviceNet trunk and subnet lines using standard shielded five-wire DeviceNet cabling. Terminate cable shields at a single ground bus point on the cabinet frame to prevent ground loops from inducing network transmission errors.
• Cable Separation and Clearance: Route low-voltage DeviceNet communication cables away from high-voltage AC power lines, motor leads, and variable frequency drive outputs to eliminate electromagnetic noise interference.