How to Use Milnor
®
Electrical Schematic Diagrams
PELLERIN MILNOR CORPORATION
Figure 10: Proximity Switches (PX)
Switch Symbols Legend
.
A. Alternating current
proximity switch
B. Direct current proximity
switch
SC=Switch, Cam Operated (Figure 11)—A switch in which the electrical contacts are opened
and/or closed by the mechanical action of a cam(s). Applications include 35-50 pound timer
operated machines, Autospot, timer reversing motor assembly, and some balancing systems.
SH=Switch, Hand Operated (Figure 12)—A switch that is manually operated (e.g., Start
button, Master switch, etc.).
Figure 11: Cam Switch (SC) Figure 12: Hand Operated Switch
(SH)
SK=Switch, Key Lock (Figure 13)—A switch that requires a key to operate. This prevents
unauthorized personnel from gaining access to certain functions (e.g., the Program menu).
SL=Switch, Level Operated (Figure 14)—A switch connected to a float that causes the switch
to open and close as the level changes.
Figure 13: Key Switch (SK) Figure 14: Level Switch (SL)
SM=Switch, Mechanically Operated (Figure 15)—A switch that is mechanically operated by a
part of or the motion of the machine (e.g., door closed switch, tilt limit switches, etc.)
SP=Switch, Pressure Operated (Figure 16)—A switch in which a diaphragm presses against a
switch actuator.
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