IDEM Product CATALOG

Guard Locking Safety Interlock Switches
FUNCTION GUIDE:
All Guard Locking Switches are intended to prevent an operator accidentally opening a guard door and being exposed to a hazard.
When choosing the correct switch it is necessary to take into account the dimensions and weight of the guard door and to install the switch so as to
avoid applying unnecessary forces to the switch locking mechanism during normal use.
All switches are specified with a holding force value (Fzh), and it is important to select the correct device to withstand the static forces applied during
normal use and dynamic effects caused by bouncing of the guard shall not create an impact reaction force with exceeds the holding force. If the
expected impact reaction forces are higher than the specified holding force for the switch, then design measures must be applied to avoid the force.
Door catches, stops and guides should always be fitted in addition to the safety switch to prevent unnecessary damage to the switch.
When the guard is closed the switch actuator is automatically locked and the switch safety contacts close.
The guard will be held closed and can only be opened after the switch solenoid is energised causing the actuator to unlock.
The operator cannot accidentally open the guard until the hazard is removed. When
the solenoid is energised the safety contacts open and the actuator can be released.
Depending on risk assessment for the application, the solenoid is usually
energised either by:
1. A request push button (for applications with immediate removal of the hazard).
2. A request push button and safety timer (for applications with a run down
hazard after removing the machine power).
3. From a PLC or if necessary a Safety PLC via a machine control command.
RFID & STANDARD VERSIONS with Rear Manual Release Buttons:
KLM-RR
KLP-P2L
KLM-P2L
KL3-SS-RR
KLTM-RFID-RR
KLTM-RFID-RR
All the features and specifications of the standard solenoid locking switches are maintained.
Where the risk assessment for the application permits, a non-latching manual escape release is provided to enable quick release of the switch lock in
case of emergency.
The switch can be mounted such that access to the release button is available from inside the active guard area. Pressing and holding the red button
releases the lock mechanism and opens the lock monitoring safety contacts to allow the guard to be pushed open.
POWER TO LOCK VERSIONS (energise the solenoid to keep the switch locked):
Only suitable for applications where immediate unlocking is required at removal or loss of solenoid power.
Not suitable for machines with a running down time.
KLTM-P2L
KL3-SS-P2L
When the guard is closed the switch
actuator will only lock and allow the
safety contacts to close after the
solenoid is energised.
The guard will be held closed and can
only be opened after the solenoid is deenergised
either by controlled request
(or by power loss).
A latching Stop/Start circuit or a PLC or
Safety PLC machine command usually
energises the solenoid.
SECTION 5
www.idemsafety.com GUARD LOCKING SAFETY INTERLOCK SWITCHES
37