Trapped Key Bolt Interlock with Control Switch (M-BS-CB-LT)

The BS-CB-LT is a trapped key bolt interlock with an integrated monitoring contact block. It is designed to physically secure guards, gates, valves, or switchgear mechanisms, helping to ensure that hazardous machinery or processes can only be accessed when safe conditions have been achieved. Inserting and turning the key retracts the bolt and activates the internal contact block, opening the safety channels and providing an auxiliary signal for monitoring or indication. An integrated lockout dust cover provides four additional holes for LOTO procedures.


  • Manufactured from Die-Cast Metal
  • Available with 2NC/2NO or 3NC/1NO Monitoring Contact Block
  • 3 Conduit Entries for Easy Installation
  • Lockout Dustcover Included manufactured from 316 Stainless Steel

Part NumberContact ConfigurationConduit Entry
M-BS-CB-22-M-LT2NC / 2NOM20
M-BS-CB-31-M-LT3NC / 1NOM20
M-BS-CB-22-N-LT2NC / 2NO1/2" NPT
M-BS-CB-31-N-LT3NC / 1NO1/2" NPT

Notes
Key sold separately

Technical Data
Body MaterialDie-Cast
Operating Temperature -20C. To +40C.
Holding Force3000N. (F1max.) 2307N. (Fzh)
Mechanical Life1,000,000 Cycles