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New safety interlock switches from Micromax

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article image SI-HG63 series hinge safety interlock switches

Banner Engineering has introduced SI-HG63 series hinge safety interlock switches, available from Micromax , for safeguarding of hazards.

SI-HG63 hinge safety interlock switches are used in place of the standard hinges on swinging guards, gates or doors. SI-HG63 hinge safety interlock switches offer two normally closed safety contacts and one normally open auxiliary contact for great application flexibility.

When the SI-HG63 hinge switch is activated, these normally closed safety contacts are forced open by a nonresilient mechanical means (not reliant on springs), interrupting the electrical circuit and sending a stop signal to the machine control.

SI-HG63 hinge safety interlock switches are also repositionable, with a safety switching point that is easily adjustable (±1.5°) throughout the hinge’s full 0-270° range of motion.

Banner Engineering’s SI-HG63 hinge safety interlock switches are built to withstand harsh plant environments, with each safety switch body integrated into a highly robust PBT housing and integrated on to a stainless steel hinge.

They are rated IEC IP67 and deliver performance and improved protection against defeat over actuator-style safety switches. Each hinge can support an axial and radial load of 1200 N (approximately 120kg).

In addition to in-line QD and out-the-back right-angle QD models, right-side and left-side hinges are available, which can be converted to operate from the opposite side when needed.

“Safeguarding a hazard with a guard, gate or door that is mounted on a hinge is one of the most common safety applications and also can be one of the most difficult to solve,” said Mike Carlson, technical manager for Banner Engineering’s safety products.

“Typically, this type of application would use a keyed-actuator style of safety switch, but because the door or guard may sag or otherwise gets deformed, alignment problems with the switch and the actuator can arise. This usually results in damage to the switch and machine downtime,” explains Mike Carlson.

“The SI-HG63 hinge switches do not have this problem and are a rugged, reliable solution that is very difficult to defeat.”

Mike Carlson adds, “When properly interfaced, they prevent cycle initiation or send a stop signal if the guard is opened, halting the hazardous motion. Depending on the number of switches on a guard and the means of interfacing, such as with a safety module, the SI-HG63 hinge switch can meet safety category 2, 3, or 4 [ISO 13849-1] and U.S. control reliability requirements.”

Applications

Banner Engineering SI-HG63 series hinge safety interlock switches offer durable construction and dependable mechanical operation to protect individuals in guard monitoring applications, including:

  • Hinged covers and guards on machines
  • Safeguarding modular aluminium framing applications
  • Doors and gates in safety fencing systems

In addition, several features of the SI-HG63 hinge switch make it particularly easy to set up and use:

  • Features two normally closed safety contacts and one normally open auxiliary contact rated at 3A @ 230V ac 1.0A @ 24V dc
  • Comes complete with repositionable safety switch integrated into a robust PBT housing and a rugged fine-cast stainless steel hinge
  • Offers right-hinge QD, left-hinge QD, and right-angle QD models and can be converted to mount from the opposite side
  • Provides IP67 rating, with switch components protected from mechanical impact
  • Operates to a full 270° range of motion, with safety switching point (guard-closed position) adjustable over full operating range (±1.5°)
  • Supports an axial and radial load of 1200 N (approximately 120kg)
  • Achieves safety category 4, per ISO 13849-1 (EN 954-1) when two SI-HG63 hinge switches on an individual guard are properly interfaced or used with an appropriate controller
  • Offers a non-switching blank hinge option

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