NOVUS AUTOMATION
3/8
2.2
ELECTRICAL INSTALLATION
The transmitter has a
4-20 mA
current output.
Variables can be monitored together or separately. Combinations of mobile jumpers
J4
and
J5
inside the transmitter housing define how variables
will be used. The jumpers also define the transmitter terminals with available output signals.
Jumper J5
Jumper J4
OUT1
OUT2
Position
A
Position
A
Temperature
Humidity
Position
A
Position
B
Temperature
Off
Position
B
Position
A
Humidity
Off
Position
B
Position
B
Humidity
Temperature
Table 1
- OUT1 and OUT2 outputs configuration
Figure 4 -
Location of jumpers J4 and J5 inside the transmitter
Figures below shows the required electrical connections.
Note that loop OUT1 must always be powered!
Figure 5 -
4-20 mA connections
Figure 6 -
4-20 mA connections with a single source
Figure 7 -
4-20 mA model with a single
source and load with 2 input channels
In the figures above,
LOAD
represents the measuring instrument of the output signal (indicator, controller, register, etc.).
The connection wires go inside the transmitter trough to the cable gland mounted in the transmitter housing.
INSTALLATION RECOMMENDATIONS
•
Electronic and analog signal conductors should run through the plant separately from the output and supply conductors. If possible, in
grounded conduits.
•
The power supply for electronic instruments must come from a network suitable for instrumentation.
•
In controlling and monitoring applications, you must consider what can happen when any part of the system fails.
•
It is recommended to use RC filters (47
Ω
and 100 nF, serial) in inductor charges (contactors, solenoids, etc.).
SENSOR CAUTIONS
The humidity sensor calibration may change in case it is exposed to contaminating vapors or to high humidity and temperature conditions for
extended periods. To speed up the calibration restoration, proceed as described below:
•
Remove the sensor from the capsule.
•
Wash it with water in case there are solid particles on it.
•
For 24 hours, place it within an 80 °C (± 10 °C) oven.
•
For 48 hours, place it in a place with temperature between 20 and 30 °C (68 and 86 °F) and humidity over 75 % RH.
•
Place the sensor back in the capsule.
