Allen-Bradley 1734-AENT Ethernet IP Adapter

1734-AENT POINT I/O Ethernet/IP Adapter – High-Speed Network Gateway

Product Introduction

The 1734-AENT from Allen-Bradley serves as a high-performance Ethernet/IP communication adapter within the POINT I/O family. This module enables a POINT I/O rack to exchange real-time I/O data with a master controller over an EtherNet/IP network. Additionally, it transfers not only I/O data but also diagnostic information, providing valuable insights for system maintenance. The 1734-AENT features a single RJ45 Ethernet port that supports 10/100 Mbps transmission speeds with auto-negotiation capability, eliminating manual rate configuration. For engineers building scalable and flexible control systems, this adapter delivers reliable and high-speed connectivity.

Key Technical Specifications

This Ethernet/IP adapter operates on a nominal 24 Volts DC input voltage with an acceptable supply range of 10 to 28.8 Volts DC. Its inrush current reaches 6 amps maximum during startup. The 1734-AENT consumes 10.4 watts at 28.8 Volts DC and dissipates approximately 5.2 watts. For backplane communication, it supplies 1000 milliamps of POINTBus current to power connected I/O modules. The module supports a maximum of 63 I/O modules or 504 I/O points in total. Communication occurs at 10/100 Mbits/s in either half or full-duplex mode, with auto-negotiation for seamless network integration. The physical interface uses an RJ45 connector with Category 5 cable, supporting both shielded and unshielded wiring.

Network Topologies and Connectivity

The 1734-AENT supports star and tree network topologies, offering flexibility for various plant floor layouts. In a star topology, each adapter connects directly to a central switch, while tree topologies allow for hierarchical expansion. The module uses the Common Industrial Protocol (CIP) as its application layer, the same protocol used across ControlNet and DeviceNet networks. This message-based protocol implements a relative path for sending messages from one device to another. Furthermore, the 1734-AENT supports both I/O connections for real-time data exchange and explicit messages for configuration and programming information. Multiple controllers can simultaneously establish connections to this adapter, enabling shared access to I/O data.

Installation and Configuration

Installing the 1734-AENT requires a standard DIN rail and a 24V DC power source. Begin by positioning the adapter vertically against the DIN rail at the leftmost side of the POINT I/O assembly. Apply firm pressure until the locking mechanism engages automatically. For network connectivity, use a Category 5 cable with RJ45 connectors on both ends. The adapter supports both shielded and unshielded cables, with a maximum wire insulation size of 3/64 inches. IP address assignment occurs via standard BootP or DHCP tools, simplifying network integration. When power is applied and an I/O connection is established, the adapter transitions the output to Idle State before switching to RUN mode, ensuring safe startup behavior even when the controller makes the connection in RUN mode.

Status Indicators and Diagnostics

The 1734-AENT provides comprehensive status indication through its front-panel LEDs. Three red/green status indicators on the CPU display Module status, Network status, and POINTBus status. Additionally, one green indicator shows Network activity, while two green power supply status indicators on the DC-DC converter display System power (5V DC to POINTBus Out) and Field power (24V DC from Field In). These LEDs enable quick diagnosis of module faults and network issues. The module also supports diagnostic data transfer alongside I/O data, allowing users to monitor system health remotely.

Power Distribution and Expansion

For systems requiring more than 17 modules, expansion power supplies are necessary to provide sufficient POINTBus current. Each expansion power supply can support up to 17 additional modules, and the 1734-AENT accommodates a maximum of 63 modules with proper power planning. The adapter includes integral reverse polarity protection, safeguarding the module from accidental wiring errors. Isolation voltage is rated at 50 Volts continuous, providing adequate protection for most industrial environments.

Mechanical and Environmental Parameters

The 1734-AENT measures 30 x 2.16 x 5.25 inches and features an open enclosure type for installation within control cabinets. It mounts directly on a DIN rail and occupies the leftmost position of the POINT I/O system. The module operates reliably within a temperature range of 0 to 55 degrees Celsius. With its compact form factor and efficient power dissipation of 5.2 watts, heat buildup remains minimal even in densely populated racks.

Application Scenarios

This Ethernet/IP adapter excels in applications requiring high-speed data exchange over standard Ethernet networks. For instance, you can deploy the 1734-AENT in packaging lines, material handling systems, or assembly stations where real-time I/O control is critical. Its support for star and tree topologies makes it suitable for both centralized and distributed architectures. Furthermore, the ability to connect from multiple controllers simultaneously enables flexible system designs where several PLCs or HMIs need access to the same I/O points. Whether used in new installations or as an upgrade to existing POINT I/O systems, the 1734-AENT delivers robust and high-performance connectivity.

Packaging List

• Allen-Bradley 1734-AENT Ethernet/IP Adapter Module (1 unit)

• DIN rail mounting base (integrated)

• Quick start installation guide

• Anti-static protective packaging

Shipping Information

All orders are shipped via FedEx, UPS, or DHL with full tracking and insurance coverage. Express shipping options are available upon request.

Frequently Asked Questions

Q1: What is the maximum number of I/O modules I can connect to the 1734-AENT?
You can connect up to 63 POINT I/O modules per adapter, totaling a maximum of 504 I/O points, with additional expansion power supplies as needed.

Q2: Does the 1734-AENT support auto-negotiation for network speed?
Yes, the adapter automatically negotiates transmission speed (10/100 Mbps) and duplex mode (half or full) with the connected switch or device.

Q3: What network topologies does the 1734-AENT support?
This adapter supports both star and tree topologies, providing flexibility for different plant floor layouts.

Q4: How do I assign an IP address to the 1734-AENT?
You can assign IP addresses using standard BootP or DHCP tools, which are widely available in most industrial networks.

Q5: Can multiple controllers connect to one 1734-AENT simultaneously?
Yes, the adapter supports connections from several controllers at the same time, enabling shared access to I/O data across multiple devices.