Limit Switch Roller Plunger 1NO+1NC IP67 (ZR 236-11Z-M20) – Schmersal

Limit switch from Schmersal with roller plunger actuator and 1 NO + 1 NC contacts, suitable for signal and safety applications. 

General information 

OEM/reference number: ZR 236-11Z-M20 
Type: Limit switch 
Actuator: Roller plunger 
Contacts: 1 NO + 1 NC 
Housing: Glass-fibre reinforced plastic 
Protection class: IP65 / IP67 
Weight: 0.06 kg 
 

Electrical data 
 

Rated voltage (AC-15): 230 V 
Current (AC-15): 4 A 
Rated voltage (DC-13): 24 V 
Current (DC-13): 1 A 
Thermal current: 10 A 
Rated insulation voltage: 500 V 
Impulse withstand voltage: 6 kV 
 

Mechanical data 
 

Mechanical life: 20,000,000 operations 
B10D (NC): 20,000,000 
Actuating force: min. 9 N 
Positive break force: min. 19 N 
Actuating speed: 
min: 20 mm/min 
max: 1 m/s 
 

Connection 
 

Cable entry: 1 x M20 x 1.5 
Termination: Screw terminals 
Wire size: 0.75–2.5 mm² 
 

Environmental 
Temperature: -30 °C to +80 °C 
 

Dimensions 
 

Length: 30 mm 
Width: 30 mm 
Height: 84 mm 
 

Function 
 

Snap-action switching 
Positive opening (NC) 
Compact design 
 

Application 
 

Escalators 
Automation systems 
Machine safety