The safety circuits, which can be independent of the machine controls, electrical signals to the machine controls and incorporate components to ensure "facilities for monitoring the state of the electrical condition. Where variations of state from norm they achieve the required result in danger, the machine stop controls are activated conventional systems mainly utilize hard wired electrical
Electrical and electronic solenoids and contact switch- electrical employing circuits switches with some electronic components ing in relays and interlocking in the control gear: The electrical equipment used should be a good quality, construction and of known or proven reliability. electronic, hydraulic and electrical, Examples of the types of circuit pneumatic- to match SILs are referred to in Table 4.8
The safety circuits, which can be independent of the machine controls, electrical signals to the machine controls and incorporate components to ensure "facilities for monitoring the state of the electrical condition. Where variations of state from norm they achieve the required result in danger, the machine stop controls are activated conventional systems mainly utilize hard wired electrical Electrical and electronic solenoids and contact switch- electrical employing circuits switches with some electronic components ing in relays and interlocking in the control gear: The electrical equipment used should be a good quality, construction and of known or proven reliability. electronic, hydraulic and electrical, Examples of the types of circuit pneumatic- to match SILs are referred to in Table 4.8
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