Sensor Wiring
74
Modline 5
eliminate long cable runs when sensors are installed at distant locations. This is especially the case when
AC power is available locally.
The standard Modline 5 cable that is routed between the Sensor and TSP Plate is limited to 350 Feet (107
meters). The power supply wires in this cable are 22 gauges. This maximum cable distance and wire
gauge assures enough voltage will be available at the sensor. The voltage drop developed across the
power supply wire pair will be small and not cause a low voltage condition.
Whether powering a single Sensor or multiple Sensors, there may also be significant voltage drops
across the wires connecting the power supply to each TSP. Keep the wire lengths between the power
supply and Terminal Strip Plate short. The voltage drops developed are dependent upon length and
gauge of the wire.
A qualified electrician or technician should apply power with the all sensors connected and measure 24
VDC, +/– 5%, at the Red and Red/White power supply terminal connections on the left side of each TSP
Terminal Strip Plate.
A 100 Ohm1 Watt fusible resistor is supplied with all TSP plates to connect power supply common to
earth ground as shown in the diagrams.
Figure 66: Sensor Wiring one 24 VDC Supply for each Sensor
To Modline 5 Sensor
To Modline 5 Sensor
To Modline 5 Sensor
Power Supply
Power Supply
Power Supply
24 VDC
24 VDC
24 VDC
