Here are some key features of the 1747-L551 module:

Memory: The PLC-5/05 processor module has 32K words of configurable memory. The memory can be used for storing program logic, data tables, and system status information.

Communication Ports: It has two communication ports: Channel 0 and Channel 1. These ports support various communication protocols for connecting to other devices such as HMI (Human-Machine Interface) panels, remote I/O modules, and other PLCs.

Programming: The 1747-L551 module can be programmed using the Rockwell Automation programming software called RSLogix 500. This software allows engineers and programmers to develop and debug ladder logic programs for the PLC.

Input/Output Capacity: The PLC-5/05 processor module supports up to 4096 inputs and 4096 outputs. The specific number of inputs and outputs that can be used depends on the configuration and modules connected to the system.

Data Handling: The module supports various data types, including integers, floats, and binary-coded decimal (BCD) formats. It also provides math, logic, and comparison functions for data manipulation.

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