Trapped Key Control Isolation Switch (Stainless Steel)

The first stage of any Trapped Key System is to isolate either the switchgear or machinery (or both in complex operations). Traditionally, there are three common isolation methods used, which include mechanical, through the control system or through the power circuitry.

IDEM’s control circuit isolation switches have been designed with a 4-Pole monitoring contact block that is activated by turning the mechanically coded key. When the key is removed, the safety contact is open, stopping any hazardous processes associated with the area you are trying to access.

The isolation key can be used to open an access lock with the same code or, if multiple access points are present, a key exchange unit can be used to release different coded keys. This will allow multiple gates to be open at the same time.

  • 316 Grade Stainless Steel
  • Panel Mount or Robust External Mounting
  • 2NC + 2NO, 3NC + 1NO or 4NC Monitoring Contact Blocks
  • SS-ISB-CB Capable of IP69K Protection.

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

The SS-ISB-CB is the first stage in the Trapped Key Process and is designed to 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: 316 Grade Stainless Steel
  • Ingress Protection: IP69K
  • Contacts: 2NC + 2NO, 3NC + 1NO or 4NC Monitoring Contact Blocks
  • Connection: 3 x M20 or ½” NPT Conduits

NOTE: Key sold separately.

External Mount Trapped Key Control Isolation Switch with Tongue Interlock (SS-TS-CB)

The SS-TS-CB can be used to isolate the control circuitry, and is designed to be mounted externally. Turning the key opens the safety contacts, turning the CONTROL CIRCUIT OFF, allowing the key and tongue to be removed. The SS-TSR-CB does not have a key present during normal operation and requires a key to be transferred to the access lock to gain entry. The SS-TS-CB can be used at the gate as both a guard interlock and control isolation switch.

  • Body Material: 316 Grade Stainless Steel
  • Ingress Protection: IP69K
  • Contacts: 2NC + 2NO, 3NC + 1NO or 4NC Monitoring Contact Blocks
  • Connection: 3 x M20 or ½” NPT Conduits

NOTE: Key and actuator sold separately.

Panel Mount Trapped Key Control Isolation Switch (SS-CS)

The SS-CS is the first stage in the Trapped Key Process and is designed to mount directly to your panel. 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: 316 Grade Stainless Steel Barrel and Mounting Plate
  • Contacts: 4NC + 2NO Monitoring Contact Blocks

NOTE: Key sold separately. Available with solenoid controlled key release.