Safety Interlock Switches

Safety Interlock Switches


Three types Safety Interlocks are available, viz., load-bearing hinge, hinged lever and rotating hinge. Safety switching point can be set anywhere within 0-180° operating range on some styles. One-piece switch eliminates need for alignment, engagement and risk of breakage of a separate actuator. Design meets positive opening requirements for safety interlocks.

  • Hinged covers and guards to machines.
  • Hinged doors and gates in safety fencing systems.
  • Modular aluminum framing.

  • Contact Rating: 3A @ 230V ac max., 1.0 A @ 24V dc max. and 2.5 kV max.
  • Transient tolerance: NEMA A300 P300.
  • Minimum Switching Speed: 5 operations per minute.
  • Mechanical Life: 1 million operations.
  • Operating Range: 0° to 270°.
  • Environmental Rating: NEMA 4, IEC IP67 acc. IEC/EN60529.
  • Operating Conditions: Temperature: –25° to +70° C (–13° to +158° F).
  • Weight: 0.65 kg (1.43 lb).

  • Safety switch is integrated into a highly robust PBT housing and screwed onto the fine-cast stainless steel hinge.
  • Safety switching point is re-positional.
  • Right-hinge, left-hinge, and right angle hinge models available; switches can also be converted to operate from the opposite side.
  • Switch components are protected from mechanical impact, for superior performance to actuator-activated safety switches; rated IEC IP67.
  • Hinge operates to a full 270° range of motion; safety-switching point (guard-closed position) is adjustable over the full 0–270°operating range.
  • Hinge can support an axial and radial load of 1200 N (120 Kg).
  • When properly interfaced or used with an appropriate controller, two SI-HG63 switches on an individual gate or guard can achieve safety category 4, per ISO 13849-1 (EN 954-1).

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