Key features and specifications of the 1747-L551/A module include:

Processor Type: It uses a 16-bit Allen-Bradley 1747-L5x processor.

Memory: It has 16K words of user memory for program storage and data handling.

Communication Ports: The module has two built-in communication ports, allowing for multiple connectivity options.

Programming: Ladder Logic (RSLogix 500) is the primary programming language used for this module.

I/O Handling: It supports a wide range of digital and analog I/O modules for connecting to sensors, actuators, and other devices.

Expansion: It supports multiple I/O and communication modules for system expansion.

Power Supply: It requires a 24V DC power supply for operation.

Allen Bradley 1734 Series Plc Model 

1734-IE2V

1734-IE4C

1734-IJ

1734-IK

1734-IM4

1734-IT2I

1734-OA2

1734-OA4

1734-OB2

1734-OB2EP

1734-OB4

1734-OB4E

1734-OB8

1734-OE2V

1734-OV8E

1734-OW4

1734-PDN

1734-RTB

1734-SSI

1734-TB

1734-TB3

1734-TBCJC

1734-TBS

1734-TOP

1734-TOP3

1734-TOP3S

1734-TOPS