UDC2500 DIN Controller The UDC2500 Universal Digital Controller is a new, low-priced addition to Honeywell’s Controller family. This controller introduces new features in the popular low priced 1/4 DIN size while retaining all the reliability, cost effectiveness, simplicity, and popular HMI of Honeywell’s UDC 2300. The UDC2500 monitors and controls temperatures and other variables in applications such as: • furnaces and ovens, • environmental chambers, • packaging machinery,