GE Energy IS220PRTDH1A | 363A4940CSP6 | Resistance Temperature Device (RTD).The IS220PRTDH1A is a Resistance Temperature Device Input Module from General Electric.  This module is part of GE’s Mark VIe Speedtronic system, which was one of the final Speedtronic systems available.  The Speedtronic line was created by GE in the 1960s for the management of industrial gas and steam turbines and included popular versions like the Mark I, Mark II, Mark IV, and Mark VI.