Description
Allen Bradley 1756-EN2TR switch input/output module
1756-EN2TR
The Allen Bradley 1756-EN2TR is engineered to deliver reliable, high-speed communication in demanding industrial environments, making it essential for real-time control and monitoring. As part of the Controllogix family, it integrates seamlessly with 1756 chassis and controllers, supporting both standard and advanced network architectures. Whether facilitating data transfer between PLCs and SCADA systems or enabling remote monitoring, the Allen Bradley 1756-EN2TR ensures consistent connectivity—critical for maintaining operational efficiency in complex automation setups. Its design prioritizes industrial-grade performance, making it a staple in environments where network downtime is not an option.
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Label
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Specification
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Model Number
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1756-EN2TR
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Brand
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Allen Bradley (Rockwell Automation)
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Type
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Controllogix Ethernet/IP Communication Module
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Ethernet Ports
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2 x 10/100 Mbps RJ45 (twisted pair)
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Communication Speed
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10/100 Mbps (auto-negotiating)
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Supported Protocols
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Ethernet/IP, TCP/IP, UDP/IP, DHCP, DNS, SNMPv1/v2c
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Operating Temp
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0–60°C (32–140°F)
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Mounting
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1756 Controllogix chassis (single slot)
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Power Requirement
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5V DC from chassis backplane (2.1W typical)
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Certifications
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UL 508, CSA C22.2 No. 14, IEC 61131-2, ATEX, IECEx
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Dimensions
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118mm (H) x 32mm (W) x 178mm (D)
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Weight
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Approximately 360g (12.7oz)
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Redundancy Support
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Yes (via 1756-RM redundancy module)
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Maximum Nodes
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Up to 4096 Ethernet/IP devices
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1756-EN2TR
The Allen Bradley 1756-EN2TR distinguishes itself with dual Ethernet ports that enable flexible network topologies, including linear, star, or redundant ring configurations. This dual-port design eliminates the need for external switches in small to mid-sized networks, reducing complexity and points of failure. Its auto-negotiating 10/100 Mbps ports adapt to existing network infrastructure, ensuring compatibility with both legacy and modern industrial Ethernet systems.
1756-EN2TR
1756-ENBT – A single-port Ethernet/IP module, ideal for simpler networks where dual ports aren’t required.
- 1756-EN3TR – A gigabit Ethernet upgrade with 10/100/1000 Mbps ports, suitable for high-bandwidth applications.
- 1756-ENET/IP – An earlier generation module, compatible with legacy Controllogix systems.
- 1756-RM – A redundancy module that works with the 1756-EN2TR to enable seamless network failover.
- 1756-CNBR – A ControlNet-to-Ethernet bridge, pairing with the 1756-EN2TR for hybrid network architectures.
- 1756-EWEB – A web server module that complements the 1756-EN2TR by enabling remote web-based monitoring.
- 1756-ENBT/A – A cost-effective variant with basic Ethernet/IP functionality, suitable for non-critical applications.
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