Allen-Bradley 1734-AENTR POINT I/O Dual Port EtherNet/IP Adapter
Overview
The Allen-Bradley 1734-AENTR is the POINT I/O Dual Port EtherNet/IP adapter from Rockwell Automation. It sits at the left of a 1734 POINT I/O assembly and connects the POINTBus backplane to an EtherNet/IP network through two RJ-45 ports configured as an embedded switch. The two ports support daisy-chain (linear) and ring topologies as well as the conventional star and tree layouts, so remote I/O cabinets can be chained without an external switch at every node.
POINT I/O is a common choice for remote I/O on Logix-controlled packages, wellhead and pipeline skids, compressor and utility systems supplied to Oman and the GCC. Seven Star LLC supplies the Allen-Bradley 1734-AENTR for new projects and as a maintenance spare, with engineering support in Muscat for system integrators and plant teams in Muscat, Sohar, Duqm and Salalah.
Operating Principle
The Allen-Bradley 1734-AENTR acts as a communication bridge: it exchanges I/O data with a Logix controller over EtherNet/IP and with up to 63 POINT I/O modules over the POINTBus backplane. Connections to the controller can be made as rack-optimised connections for digital modules, enhanced rack-optimised connections for digital, analog and specialty modules (up to five), or direct connections to individual modules (up to 31, or 20 if any safety I/O module is on the backplane). Rockwell states that RSLogix 5000 version 17 or later is required for the adapter Add-on Profile.
The Allen-Bradley 1734-AENTR also powers the backplane. It accepts 10 to 28.8 V DC and produces a 5 V DC POINTBus supply of up to 0.8 A, while passing field power through to the modules on the right. The output stays within specification when the input drops out for 10 ms at 10 V with maximum load. Where the modules need more than 0.8 A of backplane current, 1734-EP24DC or 1734-EPAC expansion power supplies extend the assembly toward the 63-module limit.
Engineering Design of the Allen-Bradley 1734-AENTR
The Allen-Bradley 1734-AENTR is an open-style unit measuring approximately 76.2 × 73.0 × 133.4 mm and weighing about 0.28 kg. It mounts on DIN rail with an orange locking screw and has a removable terminal block for the 24 V DC power wiring, rated for 0.34 to 2.1 mm² (22 to 14 AWG) copper conductors. The front carries status indicators for module, network, POINTBus, network activity, link 1 and link 2 activity and status, system power and field power, which makes commissioning and fault finding straightforward.
The IP address can be set with a three-digit pen-push thumbwheel on the front. Valid settings are 001 to 254, giving an address of 192.168.1.x; the unit ships set to 999 with DHCP enabled, so the address can alternatively come from a DHCP or BootP server or from non-volatile memory. Environmental ratings of the Allen-Bradley 1734-AENTR include operation from -20 to 55 °C, 5 g vibration from 10 to 500 Hz and 30 g operating shock. The adapter carries c-UL-us listing for Class I Division 2 hazardous locations and ATEX marking II 3 G Ex nA IIC T4 Gc when the product is marked, which suits Zone 2 installations when installed in a suitable enclosure.
Key Features
The Allen-Bradley 1734-AENTR delivers the following functions in a POINT I/O system:
- Two RJ-45 EtherNet/IP ports with an embedded switch for star, tree, daisy-chain/linear and ring networks.
- 10/100 Mbit/s communication in half or full duplex over Category 5 or 5e shielded or unshielded cable.
- Support for up to 63 POINT I/O modules, with 0.8 A of POINTBus current from the adapter itself.
- Up to five rack-optimised or enhanced rack-optimised connections and up to 31 direct connections.
- IP address setting by front thumbwheel, DHCP/BootP or stored configuration.
- Wide 10 to 28.8 V DC input with reverse polarity protection and 10 ms ride-through.
- Operating temperature of -20 to 55 °C, 5 g vibration and 30 g shock ratings for skid and panel use.
- Class I Division 2, ATEX Zone 2, CE, RCM, KC and EAC certifications when marked, and ODVA conformance tested.
Industrial Applications
The Allen-Bradley 1734-AENTR is widely used to place I/O close to the process: remote junction panels on gas compressor and metering skids, wellhead control panels, water pumping and treatment stations, tank farm instrumentation and packaging lines. Ring topology allows a single cable fault to be bypassed when the network is configured for ring operation, which is valuable for long cable runs across process plants in Oman.
For oil and gas, utilities and manufacturing customers in the Sohar and Salalah industrial zones, Seven Star LLC supplies the Allen-Bradley 1734-AENTR as a trusted supplier together with POINT I/O modules such as the Allen-Bradley 1734-IB8 8-point digital input module. We also support Rockwell drive and legacy controller systems, including the Allen-Bradley PowerFlex 755 AC drive and the Allen-Bradley 1747-ASB remote I/O adapter for SLC 500 installations.
Technical Specifications
The Allen-Bradley 1734-AENTR data below are taken from the Rockwell Automation installation instructions, publication 1734-IN040.
| Parameter | Specification |
|---|---|
| Model | Allen-Bradley 1734-AENTR (conformal coated version: 1734-AENTRK) |
| Expansion I/O capacity | 63 modules max.; up to 5 rack-optimised / enhanced rack-optimised connections; 31 direct connections (20 with safety I/O) |
| Ethernet | 10/100 Mbit/s, half or full duplex; 2 RJ-45 ports configured as embedded switch |
| Topologies | Star, tree, daisy-chain/linear and ring |
| Input voltage | 24 V DC nominal, range 10 to 28.8 V DC, reverse polarity protected |
| POINTBus output | 5 V DC at 0.8 A max. |
| Field side power | 24 V DC at 400 mA max. (adapter); field power output 10 to 28.8 V DC at 9 A |
| Inrush current | 6 A for 10 ms max. |
| Power consumption / dissipation | 10.4 W / 6.3 W max. at 28.8 V DC |
| Isolation | 50 V continuous, reinforced insulation; type tested at 500 V AC for 60 s |
| Dimensions (H × W × D) | 76.2 × 73.0 × 133.4 mm approx. |
| Weight | 0.28 kg approx. |
| Operating temperature | -20 to 55 °C |
| Relative humidity | 5 to 95% non-condensing |
| Vibration / shock | 5 g at 10 to 500 Hz / 30 g operating, 50 g non-operating |
| Certifications (when marked) | c-UL-us incl. Class I Div 2; CE; RCM; ATEX II 3 G Ex nA IIC T4 Gc; KC; EAC; ODVA EtherNet/IP conformance |
How to Order
To request the Allen-Bradley 1734-AENTR, send Seven Star LLC an RFQ with the quantity, the series required and the POINT I/O modules in your assembly. Our automation engineers in Muscat will confirm availability and lead time, check backplane current and connection limits on request, and supply the Rockwell installation instructions for download. Seven Star LLC supplies Allen-Bradley automation components across Oman and the GCC with engineering support in Muscat.
- Installation Instructions Allen-Bradley 1734-AENTR Installation Instructions (1734-IN040) Download
Allen-Bradley product families listed here
Current controller platforms on this page are ControlLogix, with the 1756-L85E ControlLogix 5580 controller and the 1756-PA72 chassis power supply, and CompactLogix 5380, with the 5069-L320ER and 5069-L340ERM. Distributed I/O is represented by POINT I/O: the 1734-AENTR dual-port EtherNet/IP adapter and the 1734-IB8 digital input module. Allen-Bradley drives listed are the PowerFlex 525 and PowerFlex 755. For installed systems there are SLC 500 parts: the 1746-A10 chassis, 1746-NI16I analog input module, 1747-ASB remote I/O adapter, 1747-KE interface and 1747-M13 memory module. A Trusted TMR digital input module (T8403) is also listed.Where Allen-Bradley hardware is used
ControlLogix and CompactLogix controllers run packaged equipment and plant utilities: compressor and pump skids, water and wastewater plants, power distribution, material handling and packaging lines. PowerFlex drives control pumps, fans and conveyors. Across the GCC, a large base of SLC 500 racks is still running, and Allen-Bradley spare parts for these systems are a frequent request.Ordering Allen-Bradley modules and drives: what we need
Send the full catalog number, the series letter and, for controllers and communication modules, the firmware revision printed on the side label. Compatibility with an existing project depends on these. For PowerFlex drives, give the complete catalog string, which encodes voltage, current rating, enclosure and options, plus the motor nameplate data. For SLC 500 parts, tell us the rack size and processor so that we can check slot and power supply loading in the manufacturer's manuals. A label photo avoids most mistakes.Browse Allen-Bradley products by category: PLC & I/O Cards, AC Drives.
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