The Allen-Bradley 1734-AENTR is a dual-port EtherNet/IP communication adapter for the POINT I/O platform, featuring a built-in 2-port switch that enables Device-Level Ring (DLR) topology support alongside linear and star configurations. It connects up to 63 I/O modules (31 direct connections) and runs on 24V DC power with 10.4W max consumption. The dual-port design eliminates the need for external Ethernet switches in linear daisy-chain deployments, reducing wiring and hardware costs. With an operating range of -20°C to 60°C and ATEX / IECEx certifications, the 1734-AENTR is ideal for high-availability machine control, conveyor networks, packaging automation, and any application requiring network redundancy through ring topology.
Frequently Asked Questions
Q: What is the difference between 1734-AENT and 1734-AENTR?
A: The 1734-AENTR has two Ethernet ports with a built-in switch, supporting DLR ring topology and linear daisy-chaining. The 1734-AENT has only a single port.
Q: How many POINT I/O modules can the 1734-AENTR support?
A: Up to 63 modules total, with a maximum of 31 direct connections on the local backplane.
Q: What topologies does the 1734-AENTR support?
A: Linear, star, and Device-Level Ring (DLR) — making it suitable for redundancy-critical applications.
Q: Does the 1734-AENTR require an external Ethernet switch?
A: For linear daisy-chain and DLR ring configurations, no external switch is needed — the built-in 2-port switch handles it.
Q: Can this module operate in higher ambient temperatures?
A: Yes, the 1734-AENTR is rated from -20°C to 60°C (-4°F to 140°F), slightly wider than the 1734-AENT.
Q: What certifications does it carry?
A: CE, UL, cUL, ATEX Zone 2, CCC, and IECEx for global deployment.
Q: What is the inrush current?
A: 6 A for 10 ms, typical for POINT I/O adapter power-up.
