[Data] Ensuring safety through the redundant structure of 2-channel systems.

basic information

Points of Labor Safety/Machine Safety 1) Degree of hazard 2) Frequency or duration of exposure to hazards 3) Possibility of avoiding hazards or potential to mitigate harm. Conduct a risk assessment from these perspectives, and based on the required performance level, implement a 2-channel redundant structure and cross-checking (mutual monitoring) to establish a system that maintains safety functions even in the event of a single failure, thereby ensuring the safety of operators.

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Applications/Examples of results

ROSS's HBB (Hydraulic Cut-off & Tank Return Valve) has a structure (Category 4) that ensures an extremely low probability of compromising safety functions not only in the event of a single failure (such as a failure of one side of the valve body) but also in terms of cumulative failures. Scene Content: Since an electromagnetic valve (power control element) was installed with a redundant structure and cross-checking (mutual monitoring) in a two-channel configuration to ensure safety, even in a situation where one valve body fails and cannot cut off the hydraulic pressure, the other valve body operates normally to cut off the hydraulic pressure and return it to the tank, allowing the operator to safely complete the mold change. Labor Safety / Machinery Safety Points: Conduct a risk assessment from the perspectives of 1) the severity of hazards, 2) the frequency or duration of exposure to hazards, and 3) the possibility of avoiding hazards or mitigating harm. Based on the required performance level, implement a two-channel redundant structure and cross-checking (mutual monitoring) to establish a system that maintains safety functions even in the event of a single failure, thereby protecting the safety of operators.