Green Ring
on Emergency-Stop Mushroom Pushbuttons 3SB3 and Illuminated Backing Plate
All Emergency-Stop mushroom pushbuttons feature a "green" ring and
are certified in accordance with ISO 13850 / EN 418.
In addition, Siemens offers an illuminated backing
plate for Emergency- Stop mushroom pushbuttons, which can be combined with a
variety of mushroom heads and is suitable for retrofitting.
The advantages at a glance
Visibility of the command point improved
Information is made available quickly, e.g. the present
switching state
Key-operated
Switch with Key Monitoring 3SB3
Switching of the monitoring contact is effected over the whole length of the
key bit (mech. principle: signal is present provided the key is inserted).
The advantages at a glance

Automatic ejection
of the key in withdrawal position

Prevents the key
being inadvertently left in the lock

Lock barrel CES

Special locks are
possible
Emergency-Stop actuator: safe and easy to assemble
Ensures that systems in danger are shut down quickly and safely. The metal design (IP67) is ideal for use even under the roughest conditions.
The housing: custom-built for any application
For control systems spread over different areas, the housing also functions as a manual control unit. If required, housing can be equipped to meet customer specifications and connected to an AS interface.
The advantages at a glance

Plastic series rated to IP66 / NEMA4X or metal series rated to IP67 / NEMA4 degree of protection

Rapid, one-man assembly without special tools means up to 50% less assembly time compared to fixing with ring nut

Considerably lower maintenance costs thanks to extremely bright LEDs with a lifetime of 100,000 hours

Anti-rotation protection as standard on holder

Faster, vibrostable connection with spring-loaded terminals

Laser inscription option – durability even under the roughest conditions
Part of our extensive product rage are actuator and switch blocks as well as
lampholders with LED which are called simple electrical apparatus in compli-
ance with ATEX directive thus being suitable for application in intrinsic circuits.