Catalogs > Safety Products Catalog > Safety Switches > Trapped Key Interlock Switches > Electronic Timed-Delay Unit
Electronic Timed-Delay Unit
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Description
The Electronic Timed-delay Unit (ETU) is used in applications that require an elapsed time to occur before allowing access to a hazardous area. The ETU uses an MSR178 control unit timer to execute the timing sequence. Turning a nonremovable key initiates the timer. When the MSR178 times out, its output energizes an internal solenoid, which then allows the removal of either one or two trapped keys.
The Single-key Timed delay Unit (STU) has one trapped key. After the MSR178 preset time has expired, the single trapped key can be removed and used to continue the next sequence in allowing access to the hazard. The single key must be returned to the STU and trapped to allow the nonremovable key to re-initiate the hazard.
The Dual-key Timed delay Unit (DTU) has two trapped keys. After the MSR178 preset time has expired, both keys can be removed and used to continue the next sequences in allowing access to the hazard. Both keys must be returned to the DTU and trapped to allow the nonremovable key re-initiate the hazard.
See the MSR178 control unit on Description for details on setting the delay time.
Features
- Timed-delay output up to 40 minutes
- Single key or dual key
- 316L stainless steel keys
- Category 1 Stop
- Replaceable code barrel assembly
- Optional IP 65 enclosure
The Prosafe Advantage
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Stainless steel construction. |