Proteus does not include this module by default in its standard library (up to v8.15 as of early 2026). You must manually add a third-party library.
The 4-channel relay module library for Proteus new had several impressive features: 4 channel relay module library for proteus new
The latest release (v2.0 or higher, often shared by community contributors like EngineerSalam or The Engineering Projects ) introduces: Proteus does not include this module by default