The PLC 1756-ENET is a ControlLogix communication module. It is an EtherNet/IP (Ethernet Industrial Protocol) interface communication module. It has been discontinued by the company and replaced with new model number 1756-ENBT with the same specification. It supports general messaging, real-time I/O messaging, and the information exchange for applications like real-time control, time synchronization, and motion. The 1756-ENET also meats the CIP safety standard by allowing simultaneous transfer of safety and control data and diagnostics information. It uses advanced communication chips and physical media. The 1756-ENET Module has 100 Mbps EtherNet/IP communication rates and uses copper wire. It supports 128 Logix and 64 TCP/IP communication connections. It can support a maximum of 8 axes for integrated motion on the Ethernet/IP Network. It draws a 700 mA current at 5.1V DC and 3 mA at 24V DC. It has a maximum power dissipation of 3.7 W and thermal dissipation of 12.6 BTU/hr. It can be installed in any slot in the ControlLogix Chassis. For wiring, it uses unshielded RJ45, category 5, twisted-pair cable connectors to interface with the controller. To operate an EtherNet/IP network, parameters such as IP address, Subnet mask, Gateway etc., must be defined. The 1756-ENET bridge has various functions like providing support for messaging, distributed I/O, and tags. It encapsulates messages within standard TCP/IP protocol. ControlNet and DeviceNet network protocols allow it to share a common application layer. It does not require any scheduling or routing table to store information. Other features include explicit protected mode, electronic keying, device level ring network, and parallel redundancy protocol network support.
The 1756-ENET is an Ethernet communication interface from PLC. This module is part of the ControlLogix platform. It is one of the first generation ControlLogix modules that is declared discontinued by the manufacturer in December 2020. This module comes with one (1) RJ-45 interface that supports Ethernet protocol and one (1) AUI port used for module maintenance and localized configuration.
