Phonetics 1104 - Manual (Page 22)

Sensaphone ® Model 1104 User’s Manual
10
Any sensor can be attached to the Model 1104 using 22-gauge
wire. The sensor can be several hundred feet from the unit, as
long as the total resistance of the circuit is not greater than 50
ohms. Use wire appropriate for the application.
Sensor wired to
Alert Input 2 Sensor wired to
Alert Input 3
2 3 4 1 GND GND GND GND
Figure 2-7. Two Sensors Wired to Adjacent Inputs
NOTE
Do not use sensors, switches, or relays that
supply any voltage or current to the Model 1104.
Be aware of proximity to other electrical wires or
components when placing wires that lead from
the sensors to the unit. Avoid running the wires
near electrical devices that use high voltage or
current, such as motors, heavy machinery, etc.
This voltage may be inductively coupled into the
sensor wiring and could result in damage to the
the Model 1104’s circuitry. Try to place wires at
least 6 inches from other electrical wiring or
devices.