Rockwell Automation 440P Bulletin 440P 2 N.C. Small Metal Safety Position Switches, 2 m Cable - Manual (Page 2)

2
Contact Opening Characteristics
Wiring Diagram
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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)
Operator heads with adjustable actuators should
NOT be used for safety applications.
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
22 (BLU)
12 (BLK)
Zb
21 (BRN)
11 (BLK/WHT)
Grnd (GRN/YEL)
ATTENTION
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.
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.
Under no circumstances must the switch be actu-
ated beyond the mechanical travel specified. Seri-
ous damage to the device and property could
result.
60° 60°
30° 30°
ATTENTION