Allen Bradley ControlLogix Communication Modules Configuration

PLC Configuration » Allen Bradley ControlLogix » Communication Modules

Available options include EtherNet/IP, ControlNet, DeviceNet, Data Highway Plus, Remote I/O, Foundation Fieldbus, Serial, DH-485, and SynchLink. Multiple communication modules can be installed in the ControlLogix system to allow control and/or sharing of data over different networks.

After determining the networks you will be using you will be able to select the communication modules your system will require and the necessary cables and network equipment. Remember to plan for extra modules and cables if you are designing a redundant system. It is possible to route a message through up to 4 different chassis (8 communication hops). A ControlLogix controller is not required in each chassis to accomplish this. The following tables list the various communication modules available to interface with your system. The first table lists normal usage applications for the industry protocol communications networks.

Communication Network Applications

Communication Network	Standard Applications
EtherNet/IP	Plant Management (Material Handling) Configuration,Data Collection & Control/Single High Speed Network Time Critical Applications/No Established Schedule Inclusion of Commercial Technologies (Video over IP, etc.) Internet/Intranet Connection Integrated CIP Motion & Safety
ControlNet	High Speed Transfer of Time Critical Data Between Controllers and I/O Devices Deterministic & Repeatable Data Delivery Media Redundancy Intrinsic Safety Redundant Controller Systems
DeviceNet	Connection of Low-Level Devices to Controllers w/o Interfacing Through I/O Modules Data Sent As Needed More Diagnostics for Improved Data Collection & Fault Detection Less Wiring & Reduced Start-Up Time than Traditional Hard-Wired System
Data Highway Plus	Plant Wide and Cell Level Data Sharing With Program Maintenance Data Sent on Regular Basis Transferring Information Between Controllers
Remote I/O	Connections Between Controllers & I/O Adapters Data Sent on Regular Basis Distributed Control/Each Controller Has I/O & Communicates with Supervisory Controller
Foundation Fieldbus	Fieldbus Transmitters & Actuators Closed Loop Control Process Automation

EtherNet/IP Communication Modules

The EtherNet Industrial Protocol Network (EtherNet/IP) is an industry standard open network which supports both real time input/output messaging and message exchange. EtherNet/IP uses readily available standard EtherNet communication chips and/or physical media.

Part Number	EtherNet/IP Application	Media	Communication Rate	CIP Motion Axes (Max)	TCP/IP Connections	Logix Connections
1756-EN2F	Bridge, Fiber	Fiber	100 Mbps	8	128	256
1756-EN2T	Bridge, Copper	Copper	10/100 Mbps	8	128	256
1756-EN2TR	Bridge, Copper, Embedded Switch	Dual Copper	10/100 Mbps	8	128	256
1756-EN3TR	Bridge, Copper, Embedded Switch	Dual Copper	10/100 Mbps	128	128	256
1756-ENBT	Bridge, Copper	Copper	10/100 Mbps	–	64	128
1756-EWEB	Web Server Module	Copper	10/100 Mbps	–	64	128
1756-EN2TXT	ControlLogix-XT Bridge, Copper, Extreme Environments	Copper	10/100 Mbps	8	128	256

EtherNet/IP Network Accessories

Part Number	EtherNet/IP Application	Specifications
1585J-M8PBJM-x	RJ45 Patchcord; x = 2 (2m), x = 5 (5m), or x = 10 (10m)	8 Conductor, Teal Riser PVC Cable (Flex Rated Cable Available)
1585J-M8CC-H	RJ45 Insulation Displacement Connector (IDC)	0.128... 0.325 mm2 (26... 22 AWG), Cat. 6, IDC, No Tool Required
1585J-M8CC-C	RJ45 Crimp Connector With Boot, Quantity: 50 Pieces	0.128... 0.205 mm2 (26... 24 AWG), Cat 5e, Crimp Tool Required
1585Jcrimp	Crimp Tool	Use With 1585J-M8CC-C
9300-RADES	Remote Access Dial-In Kit	56 Kbps Modem Connection With: Pre-Configured Modem, Communication Module, DIN Rail Mounting Hardware, and Associated Cables

ControlNet Communication Modules

The ControlNet network provides high speed capabilities by combining the best aspects of an input/output network and a peer-to-peer network. ControlNet features deterministic, repeatable transfers of critical control data. The modules with 128 Logix connections also have an additional 3 connections reserved for redundant control. For the modules with 64 Logix connections it is recommended to use only 40 to 48 of these for input/output connections.

Part Number	ControlNet Application	Communication Rate	Logix Connections	Number of Nodes
1756-CN2/B	Standard Media Bridge	5 Mbps	128 (+3)	99
1756-CN2R/B	Redundant Media Bridge	5 Mbps	128 (+3)	99
1756-CNB	Standard Media Bridge	5 Mbps	64	99
1756-CNBR	Redundant Media Bridge	5 Mbps	64	99
1756-CN2RXT	ControlLogix-XT Redundant Media Bridge	5 Mbps	128 (+3)	99

DeviceNet Communication Module and Accessories

The DeviceNet network, as its name implies, provides communication connections between system devices. The devices can be as simple as sensors and actuators or more complex devices, such as controllers and computers.

Part Number	DeviceNet Application
1756-DNB	DeviceNet Bridge Module Communication Rates: 125 Kbps (500 m max); 250 Kbps (250 m max); 500 Kbps (100 m max) Number of Nodes: 64
KwikLink Lite Flat Media	Newer, ODVA approved for wiring DeviceNet networks. Supports intermixing of DeviceNet cable types, such as round with flat. KwikLink Lite connectors provide insulation displacement.
KwikLink Flat Media	Modular cabling with flat 4-wire cable and insulation displacement connectors (IDCs). System Nodes can be added without cutting or stripping trunkline. Eliminates need for predetermined cable lengths.
Round Media	Round trunk cable is available in bulk spools or as pre-molded cable sets of various lengths. Round cable supports rugged and durable DeviceNet components, including stainless steel versions: 1. Thick trunk round cable provides maximum length DeviceNet trunk lines. 2. Thin trunk cable reduces maximum trunk line distances with a more compact installation. Thin cable outer jacket is TPE for added chemical resistance.

Data Highway Plus and Remote Input/Output Communication Modules and Accessories

Part Number	Description	Communication Rate	DH+ Connections	RIO Connections	Logix Connections
1756-DHRIO	DH+/Remote I/O	57.6 Kbps, 115.2 Kbps, 230.4 Kbps	32 DH+ messages per DH+ Module	Remote I/O Scanner: 32 logical rack /channel; 16 block-transfer/channel	32
1756-RIO	Remote I/O	57.6 Kbps, 115.2 Kbps, 230.4 Kbps	--	Remote I/O Scanner/Adapter: 32 physical racks (0... 76), any rack size and/or block transfers	10 Scheduled Input/Output
1756-DHRIOXT	Extended Temperature DH+/Remote I/O	57.6 Kbps, 115.2 Kbps, 230.4 Kbps	32 DH+ messages per DH+ Module	Remote I/O Scanner: 32 logical rack/channel; 16 block-transfer/channel	32
1770-CD	Belden 9463 twin axial cable; connects communication module to DH+ Network
9300-RADKIT	Remote access dial-in kit: 56 Kbps modem connection to DH+ Network devices. Kit includes: Pre-configured Modem, Communication Module, DIN rail mounting hardware, and associated cables.

FOUNDATION Fieldbus Linking Devices

FOUNDATION Fieldbus networks are designed for distributed control of process applications. The Fieldbus network is linked to other plant networks with the following bridge devices. Although these linking devices can accommodate up to 16 devices per H1 link, 8 to 10 devices per link is recommended.

Part Number	Fieldbus Application	Communication Rate	H1 Ports	Devices per H1 Link	Total Device Links Available
1757FFLD2	EtherNet/IP Network Bridge	Fieldbus: 31.25 Kbps EtherNet/IP: 10/100 Mbps	2	16	32
1757-FFLD4	EtherNet/IP Network Bridge	Fieldbus: 31.25 Kbps EtherNet/IP: 10/100 Mbps	4	16	64
1757-FFLDC2	ControlNet Network Bridge	Fieldbus: 31.25 Kbps ControlNet: 5 Mbps	2	16	32
1757-FFLDC4	ControlNet Network Bridge	Fieldbus: 31.25 Kbps ControlNet: 5 Mbps	4	16	64

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