1769-L24ERQB1B CompactLogix controller Compact I/O modules offer compact

Allen-Bradley's 1769-L24ER-QB18 controller has 750 KB of user memory and eight network nodes. It has 32 controller tasks and 1000 programs/tasks.
The Allen-Bradley 1769 CompactLogix controller is an advanced control system that provides communication and I/O components in a distributed control package.

CompactLogix controllers are part of the Logix family of controllers that provide a small, powerful and cost-effective system that includes the following:

• RSLogix™ 5000 programming software
• For EtherNet/IP (1769-L32E and 1769-L35E only) and ControlNet (1769-L32C and 1769-L35CR only) networks
The built-in communication port • 1769-SDN communication interface module via DeviceNet
Provides I/O control and remote device configuration • Built-in serial ports on each CompactLogix controller
Compact I/O modules offer compact, DIN rail or panel mounted I/O systems

CompactLogix system precautions
• The CompactLogix controller is always the leftmost module in the system.
• The controller must be inside the four modules of the system power supply. Some I/O modules may be as many as eight modules away from the power supply. For more information, see the documentation for the 1769 I/O module.
The 1769-L32E controller supports up to 16 I/O modules and the 1769-L35E controller supports up to 30 I/O modules. Two controllers can use up to three I/O banks, as well as two expansion cables.
Each I/O bank requires its own power supply.
• Only one controller can be used in a CompactLogix system.
A 1769-ECR right cap or a 1769-ECL left cap is required to terminate the end of the communication bus.