Rockwell Automation 440P Small Metal Safety Switches (4-Pin) - Manual (Page 2)

2
Mounting Dimensions [mm (in.)]
Contact Opening Characteristics
34
(0.34)
20
(0.79)
35 (1.38)
25
(0.98)
30.4 (1.2)
43
(1.69)
16 (0.63)
Ø8 (0.31)
M12x1 TAP
Ш7.2 (0.28)
Ш4.2 (0.17)
Nonpanel Mount
Panel Mount
4-Pin Male Micro (M12)
Countersink Hole
\
• Panel mount clearance hole = 13 mm (0.51 in.) 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.
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.
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
Wiring Diagram
ATTENTION: Under no circumstances must the switch
be actuated beyond the mechanical travel
specified. Serious damage to the device
and property could result.
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)