Historical
IEC 62138 Ed. 1.0 b:2004
Nuclear power plants - Instrumentation and control important for safety - Software aspects for computer-based systems performing category B or C functions
Provides requirements for the software of computer-based I&C systems performing functions of safety category B or C as defined by IEC 61226. Complements IEC 60880 and IEC 60880-2, which provide requirements for the software of computer-based I&C systems performing functions of safety category A. Is also consistent with, and complementary to, IEC 61513.
International Electrotechnical Commission [iec]