DAVIS GroWeather/EnviroMonitor: Systems Installation - Manual (Page 16)

System Installation
Page 16 Industrial System Installation Manual
Field System Installation
The illustration on the following page shows an example of an installation in
which the sensor interface module is placed outside (using the Multi-Purpose
Shelter for protection) and a single cable is run from the SIM to the console,
which is located indoors. The sensor interface module (SIM) need not be
mounted on the Sensor Mounting Arm support mast; it may be located at any
intermediate point between the sensors and the console. If desired, you may
run shielded cable from the SIM to the ICAM and then run standard 8-Conduc-
tor Cable from the ICAM to the console, which will allow you to place the SIM
farther from the console.
This advantage of this installation is that it keeps sensor cable runs relatively
short; the longer portion of the cable run to the console is made with a single 8-
conductor cable, which is easier to route and lower in cost than multiple sensor
cables. However, the standard cables supplied with the sensors are 40’ in
length which may result in a surplus of up to 30’ (9 m) of cable.
Consult the table below to determine the maximum cable run for power cables
to the AOM and the Multi-Purpose-Shelter Heater (MPS Heater). You will need
to splice the power cable to the AOM’s AC power adapter using a Terminal
Box, Surge Protectors, or Waterproof Crimp-Type Splice Connectors (Terminal
Box shown). The power cable for the MPS Heater connects into the heater’s
control unit, which allows you to turn power to the heater on and off.
M AXIMUM C ABLE R UN
FOR
AOM P OWER C ABLE
M AXIMUM C ABLE R UN
FOR
S HELTER H EATER P OWER
C ABLE
T YPE OF C ABLE
600 feet (180 m) 100 feet (30 m) 2-Twisted Pair Cable
(#7884)
600 feet (180 m) 100 feet (30 m) 20 AWG Pair (0.75 mm 2 )
800 feet (240 m) 160 feet (48 m) 18 AWG Pair (1.0 mm
2
)
1200 feet (360 m) 250 feet (75 m) 16 AWG Pair (1.5 mm
2
)