Safety Interlock Switches
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Safety Interlock Switches parts
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Filter in catalog →Frequently asked questions
What is the safety rating of the D4NL-2FFA-B?
SIL 3 according to IEC 61508 and PLd Category 3 per EN 13849-1. Suitable for safety-critical machine guarding applications.
Does the D4NL-2FFA-B require manual reset?
Yes. The solenoid-release mechanism requires manual reset after a door open event, preventing automatic machinery restart without operator intervention.
What is the operating voltage?
24VDC rated. The solenoid release operates at 24VDC for safe, low-energy machine control.
Is this switch suitable for washdown environments?
Yes. The IP67 rating provides protection against high-pressure washdown and wet industrial environments.
How does the coded magnetic actuator work?
A coded magnet on the door actuates the switch. The magnetic pattern prevents activation by unauthorized magnets, enhancing safety.
Can the D4NL-2FFA-B be retrofitted to existing machines?
Yes. Standard surface-mount configuration allows installation on existing guard doors and safety gates.