A-B 440R-E21358

The A-B 440R-E21358 module is an industrial automation control module manufactured by Rockwell Automation (Allen-Bradley, A-B). Specifically, it usually belongs to the Rockwell Automation PLC (Programmable logic Controller) extension module family, which is used to expand the input and output capabilities of the PLC or to implement specific control functions.

Product name resolution
A-B: Short for Allen-Bradley, an important brand of Rockwell Automation.

440R: Usually represents the PLC series or module series, and the 440 series is a more common series of Rockwell Automat

ion.
E21358: Specific module model, which contains detailed information about module functions, input and output types, etc.
Product description
The specific functionality of the A-B 440R-E21358 module depends on its configuration. In general, this type of module can perform the following functions:

Analog input: acquisition of analog signals from sensors, such as temperature, pressure, flow, etc.
Digital input: Collect digital signals from switches, relays and other devices.
Analog output: Output control signals, such as the opening of a regulating valve.
Digital output: control relays, motors and other equipment.
Communication: Communicate with other devices through various communication protocols (e.g. DH+, Ethernet/IP).