Omega Vehicle Security LV-510 - Manual (Page 3)

3
ELECTRICAL Step Two
Signal Outputs (Normally Open vs. Normally Closed): The LV‐510 series float switch ships from the factory in
the Normally Open (NO) configuration. The normal state is when the float is resting on the bottom of the
stem. An orientation mark will appear on the top of the float when it is in the NO configuration. To switch the
LV‐510 series from NO to NC configuration, flow the steps below.
1. Remove the C‐clip from the stem.
2. Remove the float and rotate it 180°.
3. Return the float to the stem with orientation mark now on the bottom.
4. Replace the C‐clip.
Normally Open Operation: Normally Closed Operation:
Orientation mark on the top of the float. In the dry
state, the float rests on the bottom of the stem and
the circuit is open. Orientation mark on the bottom of the float. In the
dry state, the float rests on the bottom of the stem
and the circuit is closed.
As the switch becomes wet, the float becomes
buoyant and circuit closes. As the switch becomes wet, the float becomes
buoyant and circuit opens.
Contact Protection (Reed Switch): When current is interrupted, the inductance of the load generates a high
frequency voltage, which appears across the switch contacts. If the voltage is large enough, it can cause
arcing. Arcing can cause the contacts to weld to each other resulting in unreliable switching performance. It is
essential to protect the circuit, by suppressing the voltage to prevent arcing. This can be accomplished
through the use of a diode for DC circuits and a resistor‐capacitor network for AC circuits.
DC Contact Protection: AC Contact Protection: