NOVUS AUTOMATION
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TxBlock-USB Transmitter
TEMPERATURE TRANSMITTER - OPERATING MANUAL – V1.0x I
INTRODUCTION
The TxBlock-USB is a 4-20 mA 2-wire temperature transmitter for
head mount, powered by the current loop. The output current is
linearized and adjusted in fuction of the input sensor type and range
configured.
Its configuration is accomplished by connecting the transmitter to a
PC USB port without the need of any dedicated interface. The
configuration does not require that the transmitter be powered.
MECHANICAL INSTALLATION
The TxBlock-USB transmitter is suitable to be installed in heads.
Vibrations, moisture and extreme temperatures, electro-magnetic
interference, high voltage and other interferences can permanently
damage the unit, and could cause error in the measured value.
DIMENSIONS:
Fig. 1 – Transmitter dimensions
ELECTRICAL INSTALLATION
•
Section of the cable used: 0.14 to 1.5 mm ².
•
Recommended torque in the terminal: 0.8 Nm.
RECOMMENDATIONS FOR INSTALLATION
•
Sensor signals conductors must go through the plant system
separate from power leads (loop), if possible in grounded
conduits.
•
The instruments must be powered from the instrumentation power
supply circuit.
•
In control and monitoring applications is essential to consider
what can happen when any part of the system fails.
•
It is recommended the use of suppressors in contact coils,
solenoids and any inductive load.
ELECTRICAL CONNECTIONS
The figures below show the electrical connections required. The
terminals 3, 4, 5 and 6 are dedicated to the sensor connection.
LOAD represents the 4-20 mA current measuring device (indicator,
controller, recorder, etc.).
PT100 2-WIRE
Note: When the Pt100 2-wire is selected, the terminals 3 and 4 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. 2 – Transmitter electrical connections (Pt100 2-wire)
PT100 3-WIRE
Fig. 3 – Transmitter electrical connections (Pt100 3-wire)
PT100 4-WIRE
Fig. 4 – Transmitter electrical connections (Pt100 4-wire)
