Rockwell Automation 440P Bulletin 440P 2 N.C. Small Metal Safety Position Switches with 4-Pin Male Micro - Manual (Page 2)

2
Contact Opening Characteristics
Wiring Diagram
Maintenance
These devices require little maintenance, but routine visual
inspection is recommended to keep foreign debris from
collecting on the exterior actuators and rollers. Removing the
operator head is not recommended as loose internal
components may be lost or improperly re-installed.
Actuation Guidelines
The method of actuation and over travel has significant
influence on the service life of the limit switch. To maximize
the service life, it is recommended to provide an actuator with
a 30° pressure angle and a surface hardness of Rc-45 max.
Under no circumstances must the switch be
actuated beyond the mechanical travel specified.
Serious damage to the device and property could
result.
Open Closed Positive Opening Point
Plunger Type
0 mm 1.4 mm 2.6 mm 5.5 mm
11-12
21-22 11-12
21-22
85° 41° 26° 0° 26° 41° 85°
Lever Type
Safety Input 1
Safety Input 2
Zb
Safety Output 1
Safety Output 2
Ground
60° 60°
30° 30°
ATTENTION
Lever Positioning
Some rotary switches are supplied with levers that are
mechanically coupled to the actuating shaft. The lever may be
removed and re-installed for cam tracking adjustment. See
table below for torque recommendations.
Torque Specifications
Location Torque
3.5 mm Operator Head Phillips Screws 0.8 N•m (7.1 lb•in)
Short and Wide Roller Lever Arm
8 mm Hex Nut 1.0 N•m (8.85 lb•in)
Adjustable Lever Arm
4 mm Allen Head Screw 1.8…2.8 N•m
(15.93…24.78 lb•in)
Adjustable Lever Arm Collar
3 mm Allen Head Screw 3.2 N•m (28.32 lb•in)
12 mm Panel Mount Nut 1.5 N•m (13.28 lb•in)