Where might I find information on the 4421B540-B to help me write my own programs to monitor sensors using it?

The Bird 4421B540-2 Interface Module enables a connection between a computer and any of the Bird 4020, 4027 and 4028 Series precision sensors. While documentation may point the reader to use one of our Bird-developed software applications, quite often the user's needs grow to the point where they need to integrate the module and sensors into a test system with custom software. 

To enable user's to automate the 4421B540-2 in their own test environment, we find it best to lead by example and provide instances of code at Bird's GitHub page under the 4000 Series sensor repository found here.