Leading Manufacturer of Safety Interlock Switches and Machine Guard Safety Switch Devices for Automation and Process Safety

External Mount Trapped Key Control Isolation Switch (M-ISB-CB)

The M-ISB-CB is used for isolating an electrical control circuit. Turning the key to the OFF position opens the safety contacts, allowing the key to be removed and transferred to the next stage in the Trapped Key System. The M-ISB-CB is enclosed within a robust die-cast aluminum body.

  • Mirror Polished Die-Cast Metal
  • Ingress Protection up to IP67
  • 2NC + 2NO, 3NC + 1NO or 4NC Monitoring Contact Blocks
  • Connection via 3 x M20 or ½” NPT Conduits
Part NumberPart Description
M-ISB-CB-22-MControl Switch Box 2NC 2NO M20 Die Cast
M-ISB-CB-31-MControl Switch Box 3NC 1NO M20 Die Cast
M-ISB-CB-40-MControl Switch Box 4NC M20 Die Cast

Key sold separately

Technical Data
Enclosure MaterialDie-Cast Metal
Safety Contact typeIEC 60947-5-1 Double break Type Zb
TerminationClamp up to 2.5 sq. mm conductors
RatingUtilisation Category : AC15
Operational Rating AC15 A300 240V. 3A /120V 6A. ac
Thermal Current (Ith)10A
Rated Insulation Voltage (Ui)500V
Withstand Voltage (Uimp)2500V
Short Circuit Overload ProtectionFuse Externally 10A. (FF)
Operating Temperature-25 ... +80 °C
Enclosure ProtectionIP67
Mechanical Life (B10d)1,000,000 cycles