GE Energy IS220PRTDH1A to 363A4940CSP6 — to Resistant Temperature Devices (RTD). IS220PRTDH1A is a resistance temperature input module in general electric. The module is part of the GE Mark VIe Speedtronic system, which is one of the latest available Speedtronic systems. The Speedtronic series was created in the 1960s by general electric to drive industrial gas and steam turbines, including popular versions such as the Mark I, Mark II, Mark IV and Mark VI.