440T Bolt Interlock Switches

ab guardmaster 440T bolt interlock smlThe Rockwell Automation Guardmaster™ safety product - Prosafe™ bolt interlocks are designed to allow access to hazardous areas when an appropriate key is inserted into the interlock. These bolt interlocks are manufactured in 316L stainless steel to provide a rugged, industrial grade method of helping prevent access through gates.
One advantage of the bolt interlocks is that there is no need to run power wires to the gate. Power is disconnected by a trapped key on a control panel and the key is then hand-carried to the gate by the operator.

The single bolt interlock (SBL) is designed to be used to access hazardous areas where partial body exposure is required. If two keys are needed for partial body access, select the dual bolt interlock (DBL) with both keys trapped.

When whole body access is needed, the DBL, with one key trapped and one key free should be used. This DBL allows the operator to carry the key into the hazardous area. When the operator returns from the hazardous area and returns the key to the DBL, the locking sequence can be reversed and the process re-started.


  • 316 Stainless steel construction
  • Single or dual key units
  • Various extensions of bolt
  • Direct drive push/pull operation
  • Replaceable code barrels
  • Fitted with tamper resistant screws
  • Weatherproof stainless steel dust cap as standard