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Allen Bradley 440T-MSSLE100A Guard Shield Safety Switch

Allen Bradley 440T Guard Shield Safety Switch, slow-acting.

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ManufacturerAllen Bradley
Part number440T-MSSLE100A
Series 440T
Actuator Type Standard Tongue
Contact Configuration 2 N.O. / 2 N.C. (Slow Acting)
Enclosure Rating IP67
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Slow-acting contacts Standard tongue actuator IP67 rated enclosure High safety integrity Robust industrial design Reliable guard monitoring

The Allen Bradley 440T-MSSLE100A is a Guard Shield safety switch featuring slow-acting contacts, designed for specific safety interlocking applications where a slower response time is required or preferred. It utilizes a standard tongue actuator to monitor the position of machine guards, ensuring that hazardous machinery cannot operate when guards are open or removed. The slow-acting contacts provide a specific switching characteristic beneficial in certain safety circuit designs.

This type of safety switch is utilized in industrial settings where precise control over machine states is necessary, such as on certain types of processing equipment, conveyors, or packaging machines. Its robust design and IP67 rating make it suitable for use in challenging industrial environments.

Stanlo Automation, a veteran-owned supplier of surplus industrial automation parts, offers the Allen Bradley 440T-MSSLE100A. We are committed to providing reliable, genuine parts for your automation needs. When you source from Stanlo Automation, you can trust in the quality and performance of our inventory, ensuring your safety systems are robust and dependable.

Series440T
Actuator TypeStandard Tongue
Contact Configuration2 N.O. / 2 N.C. (Slow Acting)
Enclosure RatingIP67
Voltage24V DC
Current1A
Operating Temperature-25 to 55 deg C
Machine guarding
Industrial automation
Packaging machinery
Assembly lines
Robotic cells
Conveyor systems
Safety interlocks
Compatible with safety relays and controllers designed to manage slow-acting safety switch inputs.
Allen Bradley 440T Slow Acting Safety Switch, Guard Shield 440T-MSSLE100A, AB 440T Interlock Switch
The 440T-MSSLE100A can replace existing 440T series safety switches with slow-acting contacts or other safety interlock switches where this specific contact type is required.
Expert tip
When using slow-acting contacts, ensure your safety system design accounts for the contact timing to meet required safety performance levels (PL/SIL).
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What is the significance of 'slow-acting' contacts on the 440T-MSSLE100A safety switch?
The 'slow-acting' designation means the contacts do not change state instantaneously upon actuator movement. This characteristic is sometimes required for specific safety circuit designs or to prevent nuisance tripping in applications with vibration or slight guard movement.