Allen Bradley ControlLogix Controllers Configuration

PLC Configuration » Allen Bradley ControlLogix » Controllers

Several options are available, including standard controllers, GuardLogix safety controllers, and ControlLogix-XT extreme temperature controllers. User memory options range from 2 MB to 32 MB.

You will need to select the appropriate controller with sufficient memory to operate your system. If there is any doubt, always select the next larger memory option. You'll also be choosing optional memory cards as needed. Controllers can be placed in any slot of a ControlLogix chassis, and multiple controllers can be mounted in the same chassis. Multiple controllers communicate with each other but can operate independently. Refer to the following tables for specifications. Controller USB ports are intended for temporary local programming. USB ports are not suited for permanent connections or hazardous locations.

Part Number	Description	User Memory
1756-L71	ControlLogix Controller with 1 built-in USB Port	2 MB
1756-L72		4 MB
1756-L73		8 MB
1756-L74		16 MB
1756-L75		32 MB
1756-L61	ControlLogix Controller with 1 built-in RS-232 Port	2 MB
1756-L62		4 MB
1756-L63		8 MB
1756-L64		16 MB
1756-L65		32 MB
1756-L63XT	ControlLogix XT Controller for Extreme Temperatures/Extreme Environments	8 MB
1756-L73XT		8 MB
1756-L61S	GuardLogix Safety Controllers	2 MB Standard/1 MB Safety
1756-L62S		4 MB Standard/1 MB Safety
1756-L63S		8 MB Standard/3.75 MB Safety
1756-L72S		4 MB Standard/2 MB Safety
1756-L73S		8 MB Standard/4 MB Safety
1756-LSP	GuardLogix Safety Partner/Use with 1756-L6xS GuardLogix Controllers
1756-L7SP	GuardLogix Safety Partner/Use with 1756-L7xS GuardLogix Controllers

ControlLogix Controllers Standard Features

Feature	1756-L61, L62, L63, L64, L65	1756-L71, L72, L73, L74, L75
Controller Tasks	32 Tasks, 100 Programs/Task, Event Tasks: All Event Triggers
Built-In Communication Ports	(1) RS-232 Serial Port	(1) USB Port
Communication Options	EtherNet/IP, ControlNet, DeviceNet, Data Highway Plus, Remote I/O, SynchLink, Third Party Process and Device Networks
Maximum Controller Connections	250	500
Connections per Network Module	100 ControlNet (1756-CN2/A); 40 ControlNet (1756-CNB; 256 EtherNet/IP, 128 TCP (1756-EN2x); 128 EtherNet/IP, 64 TCP (1756-ENBT)
Controller Redundancy	Full Support
Integrated Motion	EtherNet/IP Connection; SERCOS; Analog Options: Encoder, LDT, SSI
Programming Languages	Relay Ladder; Structured Text; Function Block; SFC
Optional Memory Cards	1784-CF128: 128 MB	1784-SD1: 1 GB; 1784-SD2: 2 GB

Redundant ControlLogix Controllers

All ControlLogix controllers support controller redundancy. A redundant controller system requires two 1756 Chassis per redundant system with these identical features:

Total number of slots
Modules in same slots in each chassis
Redundancy firmware in each chassis
Two additional ControlNet Nodes outside the redundant chassis pair
One 1756-RM Redundancy Module per chassis to support one 1756-L64 or L65 controller or one 1756-RM to support two 1756-L71, L72, L73, L74, L75, L61, L62 or L63 controllers
Maximum seven communication modules. Choose from 1756-CN2/B, CN2R/B, EN2T, or EN2F Modules
One 1756-RMCx cable

Be sure to see the Technician's Dream Bundle

Click for PLC Programming Training