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The CM-S221 safety switches can approach each other from 
most angles.  

When the switch is closed the targets on the printed face of 
the switch must be aligned. 

Mount the switch on to the machine frame and the actuator on 
to the opening edge of the door. Always try to mount the 
switch on non-ferrous material.  

Ferrous materials may reduce the switching distance.  

Use the tamper proof screws.  

Do not use the safety switch as a door stop. Leave a minimum 
of 50 mm between any adjacent switches. 

EN 1088  
Provides some mounting suggestions, see example opposite.  

When fixing the safety switch to a sliding door (A), ensure that 
when the door is opened (B) it is not  
easily accessible, helping prevent the system being 
overridden.  

All contacts should be fused externally

 

DC  

CM-S221 

0.2 Amps 

Mounting 

Contacts & Connections 

External Fusing 

PRE-WIRED SWITCHES 

WRONG!

Minimum 50mm

Leave a 2mm Gap
to prevent damage.

Red 

Black 

Green 

Blue 

White 
Yellow 

CM-S221 

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