Leading Manufacturer of Machine Safety Products and Guard Interlocking Systems

Product range approvals:

Trapped Key Control Isolation Switches for Explosive Environments (Die-Cast)

In electrical and safety engineering, hazardous locations are places where fire or explosion hazards may exist. Sources of such hazards include gases, vapours, dust and fibres which are combustible or flammable.

IDEM’s range of Trapped Key Control Isolation switches have been developed to operate in explosive environments. The internal contact block has been third party approved by IECEx to the latest ATEX standards.

The system works by releasing a factory coded mechanical key in a pre-determined sequence to ensure the machine control circuitry is isolated before accessing hazardous or dangerous machinery.

After the machine control has been isolated (first key turned in the system) the key from the isolator can then be used to release other trapped keys to permit access to the guarded areas.

Product range features:

  • Material: Mirror Polished Die-Cast Metal
  • Ingress Protection: IP67
  • Operating Temperature: -20C to 60C

Explosion Proof Trapped Key Control Isolation Switch (M-ISB-CB-EX)

The M-ISB-CB-EX is the first stage in the Trapped Key Process and can be mounted externally. Turning the key opens the safety contacts, turning the CONTROL CIRCUIT OFF, allowing the key to be removed and transferred to the next stage in your Trapped Key System.
  • Body Material: Mirror Polished Die-Cast Metal
  • Ingress Protection: IP67
  • Contacts: 2-Pole or 4-Pole Ex Rated Contact Blocks
  • Zones: 1, 21, 2, 22
  • Ex Marking: Exd IIC T6 (-20 ≤ Ta ≤ +60C) Gb / Ex tb IIIC T85C (-20 ≤ Ta ≤ +60C) Db
NOTE: Comes with 3m of pre-wired cable (longer available on request). Key sold separately.

Explosion Proof Trapped Key Control Isolation Switch with Tongue Interlock (M-TS-CB-EX)

The M-TS-CB-EX can be used to isolate the control circuitry and can be mounted externally. Turning the key opens the safety contacts, turning the CONTROL CIRCUIT OFF, allowing the key and tongue to be removed. The M-TS-CB-EX does not have a key present during normal operation and requires a key to be transferred to the access lock to gain entry. The M-TS-CB-EX can be used at the gate as both a guard access interlock and/or control isolation switch.
  • Body Material: Mirror Polished Die-Cast Metal
  • Ingress Protection: IP67
  • Contacts: 2-Pole or 4-Pole Ex Rated Contact Blocks
  • Zones: 1, 21, 2, 22
  • Ex Marking: Exd IIC T6 (-20 ≤ Ta ≤ +60C) Gb / Ex tb IIIC T85C (-20 ≤ Ta ≤ +60C) Db
NOTE: Comes with 3m of pre-wired cable (longer available on request). Key sold separately.