Allen-Bradley 1734-ACNR POINT I/O ControlNet Adapter Module

Configured for distributed I/O management within ControlNet network platforms, the Allen-Bradley 1734-ACNR (1734-ACNR ControlNet Adapter Module) provides direct physical execution of data exchange between the network medium and the POINTBus backplane.

Hardware Specifications

Profinet / EtherNet/IP Deterministic Networks

The 1734-ACNR facilitates deterministic network communication by acting as the gateway between the ControlNet bus and connected POINT I/O modules. It supports I/O density scaling by allowing the connection of multiple terminal bases to a single adapter, optimizing backplane bus communication velocity. The module is compatible with standard firmware updates to maintain network synchronization and protocol integrity. By managing the backplane power distribution, the adapter ensures that individual I/O modules receive consistent voltage levels, with reverse polarity protection included to prevent damage during installation or power surges.

Frequently Asked Questions

Q: Does the 1734-ACNR support hot-swapping of connected I/O modules?

A: Yes, the POINT I/O system supports Removal and Insertion Under Power (RIUP). However, always verify that the adapter and the associated backplane are in a non-fault state before removing any I/O module to prevent interruption of the ControlNet bus traffic.

Q: What is the primary function of the adapter in a ControlNet configuration?

A: The adapter serves as the coordinator for the POINT I/O node. It translates the ControlNet protocol into the internal POINTBus protocol, allowing the controller to scan and manage the status of all digital and analog I/O modules installed on the backplane.

Field Installation Guidelines

1. Ensure the DIN rail is securely mounted and grounded to the cabinet backplane to facilitate proper chassis ground connection for the adapter.
2. Slide the adapter onto the DIN rail until the locking mechanism engages; confirm the module is flush with adjacent terminal bases to maintain backplane bus continuity.
3. Terminate 24 VDC input power to the designated terminals, ensuring the wire gauge is sufficient to handle the 6 A inrush current and continuous current requirements.
4. Connect the ControlNet media cable to the BNC or tap connector on the adapter, ensuring proper termination to prevent signal reflections on the network.
5. Verify that the total current draw of all installed POINT I/O modules does not exceed the 1000 mA capacity provided by the 1734-ACNR backplane bus power supply.