LS11 Sample Circuit | LS21
Sample Circuit | Contact Protection Circuits
1) On D.C. circuits observe polarity (red is plus [+], black is minus [-]).
No damage will occur if reversed, but the light will not operate.
2) On A.C. circuits there are no polarity requirements. The light output
will be less on A.C. voltages than on D.C. voltages.
Protection circuits and installation instructions are identical. Example:
LS11 Same as LS10NO
LS21 Same as LS20NO
There are four types of loads which could be encountered:
A. RESISTIVE: For resistive loads a contact protection circuit is not
B. INDUCTIVE: An inductive load, such as a relay, solenoid, or counter, will
cause an inverse voltage when the contacts are opened and contact deterioration
may result. In order to prevent this, contact protection circuits 1 or 2 may be
C. INCANDESCENT: Incandescent lamp loads cause high in rush current
resulting in short contact life. To prevent this, contact protection circuit 3
or 4 may be used.
D. CAPACITIVE: Capacitive loads are seldom encountered. Consult the factory
for contact protection circuit.