GE’s Series 90‑70 PLC family is built around a VME‑bus architecture and supports IEC‑61131‑3 languages, making it more capable than the entry‑level 90‑30. It offers modular racks, wide I/O options and optional redundancy, but this line is at least a generation behind modern controllers. While it still excels in legacy applications that require Genius I/O or migration from older racks, new projects should weigh the complexity and cost of 90‑70 hardware and software against newer PAC systems that deliver higher performance, easier configuration and better networking out of the box.