Interlock Switches

3-45

Non contact Switches

Ferrogard 1, 2, 20 & 21

Application Details

Encapsulated in the Ferrogard is a unique high power industrial reed,

capable of switching up to 15A. The need switch is de-rated by a

non resettable overload protection fuse. On presenting the actuator

to the switch, the high intensity magnetic field from the actuator

causes the contacts to close. On removing the actuator (opening

the door), the safety contacts open.

Operating Principle

When the actuator is aligned with the switch, the

sensing distance is 10mm (0.39.) As the amount of

misalignment increases, the sensing distance

decreases. Beyond 4mm (0.16), the switch will not

actuate in the presence of the actuator.

10 (0.39)

Misalignment tolerance on

nonferrous materials

4 (0.16)

4 (0.16)

Typical Operating Curve