Conveyor Trip Switch (Pullkey) – IPS3000

The IPS3000 Trip Switch System consists of a Controller and up to 254 Pullkeys. The Pullkey has a stainless steel lockout mechanism with a pilot contact, a pre-start alarm (PSA) with proving, and local identification of the lock-out number. The Controller’s dual pilot relay output provides the safety interlock to the motor control centre and PLC.

New Features:

  • New pilot end-of-line unit (with base plate) to prevent bridging out
  • PSA sound intensity at 30cm is 110dBA (typical)
  • LED strobe on each Pullkey indicates PSA visually
  • Pilot loop LED in each Pullkey confirms switch action in lock-out
  • Indicates pilot status and PSA proof status via two fail-saferelaycontacts each
  • Low power consumption
  • Pilot module with automatic time-out for fault finding (to prevent bridging out)



  • Mechanical flag-arm to indicate lock-out state
  • Pullkey fails to a safe condition
  • Stainless steel back-plate with protection hood
  • Lockout number identification from any Pullkey in the system
  • Proven protection against lightning
  • I.S. system maximum length of 3km
  • IP65 enclosure
  • Loud distinctive sound pattern makes PSA audible above high background noise levels
  • External keypad interface allows configuration without opening the flame-proof enclosure
  • Dedicated addresses available for belt tear, misalignment, etc.



  • Pilot module with automatic time-out for fault finding (to prevent bridging out)
  • Supplies diagnostic information of the Pullkey System to the PLC, both for Pullkey and PSA Proof functions
  • Several popular protocols available
  • Simple 9-bit diagnostics information via potential-free contacts
  • New HMI via keypad character display (4 lines X 20 characters) and status LED’s



  • Long overland conveyor belts
  • Underground trunk and section conveyor belts


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