Process & Critical Infrastructure EtherNet/IP Solution — Allen-Bradley 1756-EN2TR/C | ControlLogix
Where This Product Is Used
The 1756-EN2TR/C is purpose-built for industrial environments where network downtime is not an option. Engineers specify this module across the following verticals:
- Oil & Gas Processing Plants — Upstream/downstream SCADA and DCS integration over redundant EtherNet/IP rings, eliminating single points of failure in pipeline control loops.
- Automotive Manufacturing — High-speed body-in-white and powertrain assembly lines where sub-millisecond failover is required to maintain production throughput.
- Water & Wastewater Treatment — Municipal SCADA networks connecting remote lift stations and treatment facilities over Device Level Ring (DLR) topology.
- Power Generation & Utilities — Substation automation and turbine control systems requiring IEC 62443-compliant network segmentation.
- Pharmaceutical & Food Processing — FDA 21 CFR Part 11 and GMP environments demanding validated, fault-tolerant communication between batch controllers and HMI/SCADA layers.
- Mining & Metals — Conveyor, crusher, and smelter control systems operating in high-vibration, high-EMI environments.
Technical Specifications
| Parameter | Value |
|---|---|
| Catalog Number | 1756-EN2TR/C |
| Series / Revision | Series C |
| Communication Protocol | EtherNet/IP (CIP) |
| Network Ports | 2 × RJ-45 (10/100 Mbps, auto-negotiate) |
| Topology Support | Device Level Ring (DLR), Linear, Star |
| DLR Ring Supervisor | Yes (configurable) |
| Max CIP Connections | 256 |
| Max TCP Connections | 128 |
| Backplane Current Draw | 1.0 A @ 5 VDC |
| Operating Temperature | 0 °C to +60 °C |
| Storage Temperature | -40 °C to +85 °C |
| Relative Humidity | 5–95% non-condensing |
| Chassis Compatibility | 1756 ControlLogix chassis (all sizes) |
| Firmware | Upgradeable via ControlFLASH |
| Dimensions (H × W × D) | 94.0 × 34.5 × 115.6 mm |
| Weight | ~500 g |
| Certifications | UL, CE, C-Tick, ATEX Zone 2 (with 1756-A4/B/K chassis) |
Why Engineers Specify This Model
- True Media Redundancy via DLR — The dual-port design enables Device Level Ring topology, providing automatic failover in <3 ms when a cable or node fault is detected — no managed switch required.
- Series C Enhancements — Improved CIP connection capacity (256 vs. 128 in Series A/B), enhanced diagnostics, and support for Integrated Motion on EtherNet/IP at higher axis counts.
- Backplane Integration — Communicates natively with Logix 5000 controllers (1756-L6x, L7x, L8x) over the ControlLogix backplane, enabling deterministic I/O scanning without external gateways.
- Scalable Architecture — Supports linear, star, and ring topologies from the same module, allowing phased network upgrades without hardware replacement.
- Integrated Diagnostics — Port-level link status, CIP connection counters, and network health LEDs reduce MTTR during fault-finding.
Complete System Bill of Materials
A typical ControlLogix redundant EtherNet/IP node using this module includes:
- 1756-EN2TR/C — EtherNet/IP Dual-Port Redundant Media Module (this item)
- 1756-L73 or 1756-L83E — ControlLogix Controller
- 1756-A7 or 1756-A13 — ControlLogix Chassis (7 or 13 slot)
- 1756-PA72 or 1756-PB72 — ControlLogix Power Supply (120/240 VAC or 18–32 VDC)
- 1756-RM2 — ControlLogix Redundancy Module (for controller-level redundancy)
- Cat5e/Cat6 shielded patch cables — for DLR ring connections
- 1783-ETAP — EtherNet/IP Tap (optional, for passive ring monitoring)
Compliance & Industry Standards
- IEC 62443-4-2 — Component-level cybersecurity requirements for industrial automation
- IEEE 802.3 — Ethernet standard (10BASE-T / 100BASE-TX)
- ODVA EtherNet/IP — Conformance tested and ODVA-certified
- UL 508 — Industrial Control Equipment
- CE Marking — EMC Directive 2014/30/EU; Low Voltage Directive 2014/35/EU
- RCM (C-Tick) — Australian/New Zealand EMC compliance
- ATEX / IECEx Zone 2 — Suitable for use in Zone 2 hazardous locations when installed in approved 1756 chassis
- RoHS Compliant — Restriction of Hazardous Substances Directive 2011/65/EU
Quality Assurance & Sourcing
All 1756-EN2TR/C units supplied by Konmask.com are sourced through verified industrial distribution channels. Each unit undergoes the following before dispatch:
- Visual inspection for physical damage, label integrity, and firmware revision verification
- Functional power-on test confirming backplane communication and port link status
- Authenticity check against Rockwell Automation serial number databases where applicable
- Anti-static packaging with humidity indicator card for safe international transit
We supply both new factory-sealed and tested surplus units. Condition is clearly stated on each listing. All surplus units carry a 90-day functional warranty.
How to Source This Part
- Confirm your Series revision — Check your existing chassis for Series A, B, or C to ensure firmware and feature compatibility. Series C is recommended for all new installations.
- Verify quantity and lead time — Contact us via the form below or email support@konmask.com for real-time stock confirmation and bulk pricing.
- Request a datasheet or test report — Available on request for surplus units.
- Place your order — Add to cart and proceed to checkout, or request a formal quotation for PO-based procurement.
- Shipping — DHL Express / FedEx International Priority available. Export documentation (commercial invoice, packing list, COO) provided for all international shipments.
Application-Specific FAQ
Q: Can the 1756-EN2TR/C act as a DLR ring supervisor?
A: Yes. The module can be configured as the active or backup ring supervisor in Studio 5000 Logix Designer. Only one supervisor should be active per ring segment.
Q: Is this module compatible with 1756-L8x (v32+) controllers?
A: Yes. The Series C module is fully compatible with all current ControlLogix L6x, L7x, and L8x controllers running Logix firmware v16 and above. Firmware v32+ is recommended for Integrated Motion on EtherNet/IP.
Q: What is the maximum number of I/O devices I can connect per module?
A: Up to 256 CIP connections per module. For larger I/O trees, multiple 1756-EN2TR/C modules can be installed in the same chassis.
Q: Can I use this module in a redundant controller system (1756-RM2)?
A: Yes. The 1756-EN2TR/C is fully supported in ControlLogix redundancy configurations. Refer to Rockwell Publication 1756-UM535 for redundancy system design guidelines.
Q: Do you provide export documentation for international orders?
A: Yes. We provide commercial invoice, packing list, certificate of origin, and HS code declaration (HS 8537.10) for all international shipments. ECCN classification available on request.
© 2026 Konmask.com. All rights reserved.
Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
