Our 440T Electronic Timed-delay Unit Trapped Key Interlock Switches are used in applications that require an elapsed time to occur before allowing access to a hazardous area. This interlock switch uses a Guardmaster® SI safety relay in combination with a Guardmaster EMD safety relay to execute the timing sequence. Turning a non-removable key initiates the timer. When the EMD times out, its output energizes an internal solenoid which then allows the removal of either one or two trapped keys.
Overview
- Timed-delay output up to 40 minutes
- Single-key or dual-key
- 316L stainless steel keys
- Category 1 stop
- Replaceable code barrel assembly
Additional Information
Protect your people, productivity, and environment with our Safety Components and integrated Safety Solutions. We understand your factory floor challenges and can help you meet your goals with one of the broadest safety portfolios in the industry.
Specifications
Certifications
- CE Marked for all applicable directives
- TÜV Certified
Functional Safety Data
- PFHd = 1.00E-7 (Probability of dangerous failure per hr)
- T1 = 20 (Proof test interval)
Standards Safety Classification
EN ISO 14119 and GS-ET-31 and can be used in safety application up to Category 3, PLd in accordance with EN ISO 13489-1, and in the application area of EN 60204-1.
Certifications apply when product is marked. See our Product Certification site for Declarations of Conformity, certificates and other certification details.
Documentation
| Resource | Publication Number | Language |
|---|---|---|
| Safety Switches Brochure | GLSAFE-BR002 | |
| Safety Switches Specifications Technical Data | SWITCH-TD001 | |
| Prosafe Electronic Time Delay Unit Installation Instructions | 440T-IN016 |