3-54

Interlock Switches

Non contact Switches

Ferrogard Applications

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.

Mounting Example 1

Door Closed, Machine RUN

Door Opened, Machine STOP, Door Covering Switch

Note: Whenever possible, the units should be mounted so that no access can be obtained to the switch when the guard door is open, thus preventing

attempts to defeat the safety system.

No access to switch thus

preventing attempts to defeat

the interlock.

Sliding Door

Sliding Door

2mm

Mounting Example 2

2mm

Min 50mm

Switch

Switch

Actuator

Actuator

Door 1

Door 2

It is advisable, where possible, to mount the switch and

actuator on nonferrous materials otherwise it may effect the

operating distances. If mounting on ferrous material, use of a

5mm plastic spacer is recommended.

Operating Principle