Allen-Bradley 1788-EN2FFR Linking Device for 1788

Allen-Bradley 1788-EN2FFR Linking Device for 1788

In modern industrial automation, the integrity of a control system depends not on any single component, but on the seamless coordination of every layer — from the CPU and backplane to the I/O modules, communication gateways, power supplies, and field devices. The Allen-Bradley 1788-EN2FFR DeviceNet Linking Device occupies a critical position within this architecture, serving as the bridge between EtherNet/IP upper-layer networks and DeviceNet field-level device networks. Designed for the 1788 series platform, this linking device enables transparent data routing, real-time diagnostics, and scalable network expansion across complex, multi-tier automation environments.

Whether deployed in a ControlLogix-based safety system, a distributed I/O cabinet, or a process control loop, the 1788-EN2FFR ensures that DeviceNet nodes — including drives, sensors, valve actuators, and relay modules — remain fully accessible and manageable from the EtherNet/IP control layer. This system integration capability allows engineers to maintain a unified network topology without sacrificing field-level granularity or real-time response.

Product Specification Table

System Compatibility Notes

The 1788-EN2FFR is engineered to function as a transparent gateway within a layered Rockwell Automation control architecture. At the control layer, a 1756-L85E ControlLogix CPU or 1756-L73 Logix5573 processor manages the primary logic execution and coordinates data exchange across the EtherNet/IP backbone. The 1788-EN2FFR connects this upper-layer controller to the DeviceNet field network, enabling the CPU to poll, configure, and monitor all connected field devices without requiring a dedicated DeviceNet scanner card in the main chassis.

On the power layer, a 1756-PA75 power supply module provides stable 24V DC to the ControlLogix chassis, while a separate DeviceNet power supply — such as the 1787-DNPS DeviceNet power supply — feeds the field network segment connected to the 1788-EN2FFR. This separation of control and field power ensures that a field-side fault does not propagate to the main control chassis, preserving system uptime and fault isolation.

At the I/O layer, the 1788-EN2FFR communicates with DeviceNet-compatible I/O adapters such as the 1734-ADN POINT I/O DeviceNet Adapter, which aggregates digital and analog signals from distributed field panels. Alongside these, 1756-IB16 digital input modules and 1756-OB16E digital output modules in the main chassis handle high-speed discrete signals, while the DeviceNet network handles distributed sensor and actuator nodes across the plant floor.

For human-machine interface integration, a 2711P-T10C21D8S PanelView Plus 7 terminal connects via EtherNet/IP to the same network segment, providing operators with real-time visibility into DeviceNet node status, fault codes, and process variables — all routed transparently through the 1788-EN2FFR. This unified HMI-to-field visibility is a cornerstone of effective system integration in modern automation systems.

In redundant network configurations, the dual EtherNet/IP ports of the 1788-EN2FFR support media redundancy, ensuring that a single cable or switch failure does not interrupt communication between the controller and the DeviceNet field network. This is particularly valuable in continuous process environments where network downtime translates directly to production loss. The 1783-BMS10CGP Stratix managed switch is commonly deployed alongside the 1788-EN2FFR to manage EtherNet/IP ring topology and RSTP-based redundancy.

Industrial Application Notes

The 1788-EN2FFR finds application across a wide range of industrial sectors where DeviceNet field devices must be integrated into modern EtherNet/IP control architectures.

In power generation and electrical distribution facilities, the 1788-EN2FFR links motor control centers, protective relays, and intelligent electronic devices on the DeviceNet segment to the plant-wide EtherNet/IP SCADA network. This enables centralized monitoring of breaker status, motor run hours, and fault events without requiring dedicated serial communication infrastructure.

In petrochemical and refinery process control systems, the device bridges DeviceNet-based valve positioners, flow transmitters, and pressure sensors to the ControlLogix safety controller, supporting SIL-rated process loops while maintaining full diagnostic transparency. Engineers can perform online device replacement and parameter configuration through RSNetWorx for DeviceNet without interrupting the running process.

In automotive and discrete manufacturing assembly lines, the 1788-EN2FFR connects robot controllers, servo drives, and vision system triggers on the DeviceNet segment to the line PLC, enabling coordinated motion sequencing and real-time quality data collection. The device’s support for up to 63 DeviceNet nodes per segment makes it suitable for high-density assembly stations with numerous field devices.

In water and wastewater treatment plants, the 1788-EN2FFR integrates pump drives, level sensors, and chemical dosing controllers distributed across remote lift stations into the central SCADA system via EtherNet/IP, reducing the need for dedicated communication infrastructure at each remote site.

In mining and mineral processing operations, where control cabinets are exposed to vibration, dust, and wide temperature ranges, the 1788-EN2FFR’s robust design and DIN rail mounting make it suitable for deployment in field junction boxes and motor control centers, providing reliable DeviceNet-to-EtherNet/IP bridging even in harsh environments.

Product Compatibility FAQ

Q1: Is the 1788-EN2FFR compatible with existing ControlLogix and CompactLogix systems using EtherNet/IP?
Yes. The 1788-EN2FFR is fully compatible with any EtherNet/IP controller, including the ControlLogix 1756 series and CompactLogix 5370/5380 series. It appears as a standard EtherNet/IP device on the network and is configured using RSNetWorx for DeviceNet and Studio 5000 Logix Designer. No special firmware or chassis modifications are required on the controller side, making it straightforward to integrate into both new and existing system architectures.

Q2: Can the 1788-EN2FFR support media redundancy, and what infrastructure is required?
Yes. The 1788-EN2FFR features dual EtherNet/IP ports that support Device Level Ring (DLR) or linear/star topologies with RSTP-based media redundancy. To implement ring redundancy, a managed EtherNet/IP switch such as the 1783-BMS series Stratix switch is required to complete the ring topology. This configuration ensures that a single point of failure in the EtherNet/IP cabling does not interrupt communication between the controller and the DeviceNet field network, which is essential for continuous process and critical infrastructure applications.

Q3: What does the warranty terms confirmed during quotation cover, and how is long-term spare parts availability managed?
All 1788-EN2FFR units supplied by ZYPLC are covered by a warranty terms confirmed during quotation against manufacturing defects and functional failures under normal operating conditions. The warranty covers full unit replacement or repair at no additional cost. For long-term maintenance planning, ZYPLC supports RFQ sourcing for the 1788-EN2FFR and related 1788 series components, enabling rapid spare parts fulfillment to minimize system downtime. Customers are encouraged to contact ZYPLC to discuss multi-unit stocking agreements and extended support arrangements for critical infrastructure deployments.