Omega OMA-P1104 - Manual (Page 26)

Omegaphone ® OMA-P1104 User’s Manual
12
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Multiple normally-closed
sensors wired in series
(example using Input 2)
Alert condition
occurs when a
switch is opened
2 3 4 1 GND GND GND GND
Figure 2-8. Multiple Normally Closed Sensors
To wire several normally open sensors to one alert input,
connect them in parallel. To do this, take one lead from each
sensor and attach it to the numbered terminal. Then, take the
second lead from each sensor and attach each to the corre-
sponding ground screw. Refer to Figure 2-9.
Alert condition occurs
when a normally open
switch closes.
2 3 4 1 GND GND GND GND
Figure 2-9. Multiple Normally Open Sensors
2.12 Outdoor Wiring
When wiring sensors outdoors, DO NOT allow exposed wires
OMA-P1104