Rockwell Automation 1756-L55M12, Selection Manual, Page: 49 / 88

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1756-SG001G-EN-P — March 2004
Step 4 - Select:
y
a controller with sufficient memory
y
memory board for each 1756-L55 controller
y
1756-BATM for larger memory size 1756-L55
controllers and all 1756-L6x controllers
y
replacement batteries
Selecting Controllers
The ControlLogix controller provides a scalable controller solution that is capable of
addressing a large amount of I/O points (128,000 digital maximum / 4000 analog
maximum).
The ControlLogix controller can be placed into any slot of a ControlLogix I/O chassis
and multiple controllers can be installed in the same chassis. Multiple controllers in
the same chassis communicate with each other over the backplane (just as controllers
can communicate over networks) but operate independently.
ControlLogix controllers can monitor and control I/O across the ControlLogix
backplane, as well as over I/O links. ControlLogix controllers can communicate with
computers or other processors across RS-232-C (DF1/DH-485 protocol), DeviceNet,
DH+, ControlNet, and EtherNet/IP networks. To provide communication for a
ControlLogix controller, install the appropriate communication interface module into
the chassis.
The multi-tasking operating system supports 32 configurable tasks that can be
prioritized. One task can be continuous. The others must be periodic or event tasks.
Each task can have as many as 32 programs, each with its own local data and logic,
allowing virtual machines to operate independently within the same controller.
Specification Description
Battery
1756-BA1 (94194801) - comes with the controller
or
1756-BATM (contains a 1756-BATA battery assembly)
✶
Programming Cable 1756-CP3 or 1747-CP3 serial cable
Certifications: UL, CSA (Class I, Division 2, Group A, B, C, D), CE, FM (1756-L6x controllers only), C-Tick, EEx ATEX
✶
The battery module is highly recommended for all controllers.