GC Series Expansion Unit Instruction Manual

This document is the instruction manual for KEYENCE GC Series expansion units, including safety input/output modules (GC-S84, GC-S16, GC-S1R, GC-A16, GC-B30). It covers safety precautions, regulatory compliance (CE, UKCA, UL, CSA, KC), installation guidelines, specifications, and wiring requirements for achieving safety levels up to SIL3, PLe, and Category 4.