What is the basis for selecting the number of cores for the S-coded M12 connector?

Core Selection Basis for Core Count of M12 S-coded Connectors

Core Selection Principle

Based on Safety Grade Requirements : M12 S-coded connectors are dedicated to industrial safety circuit applications, and the core count selection is strictly matched with the actual safety function and safety grade design requirements of the equipment.

Core Count Classification & Corresponding Application Scenarios

3-core

Basic safety signal transmission, suitable for single-channel safety control equipment such as single-circuit emergency stop switch.

4-core

Safety circuit with signal feedback, perfectly fit for safety light curtain, safety door switch with working status feedback function.

5-core

Redundant safety circuit design, dual-loop signal transmission structure, greatly improve the reliability of safety system and avoid single point failure.

Technical Note: S-coded is the dedicated coding specification for industrial safety bus (ASI bus), the core count matching is related to the safety integrity level (SIL) of the whole industrial control system, and the higher core count means higher safety redundancy.

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