HOME > STF DESIGN TYPE 2 SAFETY SWITCHES

STF Design Type 2 Safety Switches

EUCHNER Design Type 2 Safety Switches are used to protect personnel by monitoring and interrupting the safety circuit depending on the position of the machine guard. The locking solenoid holds the guard closed until a stored energy hazard has dissipated. It can also prevent damage to a part in process due to an inadvertent machine shutdown. To meet current worldwide standards, safety interlock components cannot be easily bypassed. These switches have positive opening contacts (in accordance to NFPA 79) and redundancy to guarantee that they fail to a safe state. The STF safety switches are based on the proven principle of the STP safety switch with guard locking, also offers a latch for the guard locking plunger.

Note: Design type 2 safety switch has an actuator that is separate from the switch body. The two must be combined or separated for switch operation.

TYPICAL APPLICATIONS INCLUDE

People protection (Stored energy hazards), Machine and production protection against: inadvertent machine shutdown and damaging machine and product, Machine tool, Presses, Grinders, Packaging, Material handling / storage retrieval systems, Plastic injection molding, Pharmaceutical, Food processing, Robot, Wood cutting

FEATURES

Solenoid locking
Prohibits unintentional locking-in not possible
Rotatable actuator head with top and side entry
Actuator insertion funnel increases entry area
Straight, bent, and hinged actuators available
Straight and bent actuators with overtravel
Actuator overtravel minimizes end stop potential
4 contacts

2 NC positively driven safety contacts
Annunciation contacts
Door and solenoid monitoring contacts

SR11 connector

Eases installation

BENEFITS

Durable metal actuator head
Multiple contacts helps to achieve the highest level of safety
Pre-wired plug connector
Reduces installation cost

Eliminates mis-wiring

High locking force
Manual bypass

Simple front bypass

TECHNICAL

Die-cast aluminum actuator head
Reinforced thermoplastic housing
Environmental protection IP65- oil and dust tight, and against splashed water from all directions
Ambient operating temperature -5 to 55°C
4 contact elements

Low current contacts
Silver alloy, gold flashed

Solenoid

Mechanical locking 24VDC

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