The original 9240SI has been discontinued. It has been replaced by the (also known as the 20549SI Loop Calibrator), which uses the same pinout and logic.
A version of the 9240SI Loop Controller Manual is hosted here. 9240si loop controller user manual
The is built on the philosophy that process control should be robust, readable, and adaptable. It bridges the gap between simple analog dials and complex PLC systems. Whether you are managing a chemical batch process or a heat treat oven, the 9240si ensures that what you set is exactly what you get. The original 9240SI has been discontinued