VAV1xx Variable Air Volume Box Controllers were used extensively for controlling VAV boxes, and they were also frequently used as I/O devices for generic monitoring and control.
To replace a VAV1xx controller in a VAV box application, you can use the VMA1832 controller as a suitable replacement. To replace a VAV1xx controller in an I/O expansion application, you can use the FEC1611 or CVM03050 controller as a suitable replacement.