Omega Vehicle Security LVP-51 Series - Manual (Page 10)

10
WIRING Step Six
Wiring to a OMEGA ENGINEERING Controller
LVCN‐120 Series Controller (4 or 20 mA output):
LVCN‐120 Shown
Switching Inductive Loads: The use of suppressors (snubbers) is strongly recommended when switching
inductive loads to prevent disrupting the microprocessor’s operation. The suppressors also prolong the life of
the relay contacts. Suppression can be obtained with a catch diode for DC circuits and a resistor‐capacitor (RC)
for AC circuits.
Catch Diode
 Always use stepper relays between the sensor and external loads.
For DC circuits use a catch diode such as 1N4148, shown on left.
Refer to the following circuits for RC network assembly and installation:
Choose R and C as follows:
 R: 0.5 to 1 Ohms for each volt across the contacts
 C: 0.5 to 1 μF for each amp through closed contacts
Notes:
1. Use capacitors rated for 250 VAC.
2. RC networks may affect load release time of solenoid loads. Check
to confirm proper operation.
3. Install the RC network at the meters relay screw terminals. An RC
network may also be installed across the load. Experiment for best
results.