The Emerson DeltaV VE4003S2B1 module is a combination of two separate modules, the KJ3222X1-BA1 and KJ4001X1-CA1, working together as an integrated solution for analog input in the DeltaV distributed control system.

1. KJ3222X1-BA1 AI Card: The KJ3222X1-BA1 is an 8-channel analog input (AI) module that supports 4-20mA signals and HART communication. It is responsible for acquiring analog input signals from field devices, such as sensors or transmitters. The module provides high accuracy and reliability in measuring these analog signals and communicating with HART-enabled devices.

2. KJ4001X1-CA1 Carrier Card: The KJ4001X1-CA1 is an 8-wide I/O carrier module that acts as a base or carrier for other I/O modules, including the KJ3222X1-BA1 AI card. It provides the physical interface and power supply for the AI card as part of the DeltaV I/O subsystem.

When the KJ3222X1-BA1 AI card is inserted into the KJ4001X1-CA1 carrier card, the combination (VE4003S2B1) forms an integrated solution for 8-channel analog input in the DeltaV system. The VE4003S2B1 module allows the DeltaV system to acquire, process, and utilize analog input signals in various control and monitoring applications, leveraging the accuracy, reliability, and HART communication capabilities of the included modules.