TxRail-USB
NOVUS AUTOMATION 3/4
OPENING THE TRANSMITTER:
In order to open the transmitter, you must press the orange lockers
located on both sides of the enclosure and pull the frontal cover very
carefully, just like shown in Fig. 05.
Fig. 5 – Opening the transmitter
ELECTRICAL INSTALLATION
•Polyamide enclosure.
•Section of the cable used: 0.14 to 1.5 mm ²
•Recommended torque in the terminal: 0.8 Nm.
RECOMMENDATIONS FOR INSTALLATION
•Conductors of small electrical signals must be distant from
activation and high-tension/current conductors, preferably passing
through grounded conduits.
•A specific electrical power supply network should be provided for
instruments use only.
•In controlling and monitoring applications, possible consequences
of any system failure must be considered in advance.
•RC filters (47R an 100nF, serial) in inductor charges (contactors,
solenoids, etc.) are recommended.
ELECTRICAL CONNECTIONS
The figures below show the electrical connections required. The
terminals 1, 2, 3 and 4 are dedicated to the sensor connection.
LOAD represents the 4-20 mA current measuring device (indicator,
controller, recorder, etc.).
PT100 2-WIRE / NTC
Note: When the Pt100 2-wire the terminals 1 and 3 must be
interconnected, according to the figure below.
The Pt100 wire length should be less than 30 cm to maintain the
measurement error within specifications (electrical resistance).
Fig. 6 – Transmitter electrical connections (Pt100 2-wire / NTC)
PT100 3-WIRE
Fig. 7– Transmitter electrical connections (Pt100 3-wire)
PT100 4-WIRE
Fig. 8– Transmitter electrical connections (Pt100 4-wire)
Pt100 3 and 4-wire: For appropriate cable resistance compensation
they should be equal for all legs. Maximum wire resistance is 25 Ωper
wire leg. Usage of a 3 or 4 wire with conductors of equal length and
gauge is recommended.
THERMOCOUPLES
Fig. 9– Transmitter electrical connections (Thermocouple)
VOLTAGE (0-50 mV)
Fig. 10 – Transmitter electrical connections (0-50 mV)
