Our ControlLogix® system uses connections to establish communication links between devices. Our Bulletin 1756 Chassis-based communication modules help make those connections and implement network-based access control for users, devices, and networks in the 1756 chassis. We offer a variety of modules that support EtherNet/IP, DeviceNet, ControlNet, and other network protocols.

1756 EtherNet/IP Communication Modules

• Offers CIP Security protocol via EN4TR and EN4TRXT communication modules
• Provides real-time I/O messaging and message exchange
• Uses off-the-shelf Ethernet communication chips and physical media
• Supports 128 or 256 Logix connections
• Offers embedded switch technology capabilities
• Supports extreme environments via ControlLogix-XT™ communication modules
• Offers secure connectivity from the control system to upper level systems, programming terminals, and other ControlLogix controllers using the secure communications module
• Provides Device Level Ring (DLR) connectivity to allow devices to form a ring topology to provide resiliency
• Offers Parallel Redundancy Protocol (PRP) support for a completely redundant network infrastructure

1756 DeviceNet Communication Modules

• Uses the Common Industrial Protocol (CIP) to control, configure, and collect data for industrial devices
• Provides connections between simple industrial devices (sensors and actuators) and higher-level devices (controllers and computers)
• Supports 64 nodes

1756 ControlNet Communication Modules

• Uses the Common Industrial Protocol (CIP) to combine the functionality of an I/O network and a peer-to-peer network that provides high-speed performance for both functions
• Provides open, control network for real-time, high-throughput applications
• Offers deterministic, repeatable transfers of all mission-critical control data
• Supports transfers of non-time-critical data
• Supports 64 or 128 Logix connections and 99 nodes
• Offers extreme environment support

1756 Data Highway Plus™ and Remote I/O Communication Modules

• Supports messaging between devices
• The remote I/O link connects to remote I/O chassis and other intelligent devices
• Remote I/O functionality enables the module to act as a scanner for transferring digital and block-transfer data to and from remote I/O devices
• Supports 32 Logix connections
• Support messaging between devices on DH+™ network

1756 SynchLink Communication Modules

• Provides time synchronization and data broadcasting for distributed motion and coordinated drive control
• Connects a ControlLogix chassis to a SynchLink™ fiber-optic communication link
• Allows the controller to consume motion axes data from a controller in another chassis

Conformal Coating

Conformal coating is now available on select ControlLogix® products to help protect your automation systems from hostile and harsh environments. Rockwell Automation tested these products for the equivalent of 10 years in an ISA G3 Group A classified environment. These products are identified by the "K" suffix in the catalog number and they

• Help to protect circuitry against exposure to pollution, moisture, temperature variation, salt spray, organic attack (fungus), and aggressive chemicals and vapors
• Offer improved product life cycle when exposed to corrosive environments by maintaining long-term surface insulation resistance (SIR) ensuring operational integrity of the assembly