Novus TxRail Installation And Operating Manual

INSTALLATION

The TxRail transmitter is intended for DIN rail mounting. Its drawing is presented in
figure 4.
19 mm
69 mm
72 mm
Figure
4 – TxRail dimensions

ELECTRICAL CONNECTIONS

Connector specification:
Insulating material: Polyamide, self-extinguishing to UL 94, V-0
♦
♦ Connection wire cross section: 0,14 – 4,0 mm²
Screw tightening torque: 0,8 Nm / 7.0 lb-in
♦
Terminal block: CuZn
♦
It is important to follow the recommendations below:
Signal wires should be installed in grounded conduits and away from power or
♦
contactor wires.
The instrument should have its own power supply wires, which should not be
♦
shared with electrical motors, coils, contactors, etc.
Installing RC filters is strongly recommended at contactor coils or any other inductors.
♦
System failure should always be taken into account when designing a control
♦
panel to avoid irreversible damage to equipment or people.
Figure 5 below shows the TxRail connections to the sensor and power supply.
Terminals 1, 2 e 3 are used for sensor input. For 2-wire Pt100, terminals 2 and 3
shall be connected together.
Pt100 3 WIRE SENSOR
1 2 3
ZERO
TRANSMISOR
ZERO
4 5 6
LOAD
POWER SUPPLY
Figure 5 – TxRail wiring (Pt100)
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Figure 6 below shows the thermocouple wiring.
1 2 3
ZERO
TRANSMISOR
ZERO
4 5 6
LOAD
POWER SUPPLY
Figure 6 – TxRail wiring (Thermocouple)
The LOAD represents the input shunt of an instrument measuring the 4-20 current
loop.

OPERATION

All input types and the 4-20 mA output current are factory calibrated. However, a
manual offset trim is implemented to provide fine adjustments to the signal in the
field. This is accomplished by the front keys ZERO+ and ZERO-. Using a small tool,
press and hold the desired key for at least 2 seconds to increase or decrease the
output current. The offset adjustment is capable of varying the output current by an
amount equal to ±0.80 mA relative to the original calibration..
The offset correction can also be accomplished by the TxConfig software. See in
Figure 3 the Zero Correction field for this purpose. The serial adaptor can be
connected to the transmitter while it is operating in the process.
Note: when using a Pt100 simulator, make sure the TxRail Pt100 excitation current
(0.18 mA) s compatible with the simulator specification.
The input types are listed in Table 1, along with the maximum and minimum ranges
accepted by each one. The TxConfig software will allow only configurations that are
consistent with the data in this table.
Please note that the specified accuracy is referenced to the maximum span of each
input type. For instance, for the Pt100 input, the 0.2 % accuracy results in 1.7 ºC
total accuracy [(650 – (-200)) x 0.2].
THERMOCOUPLE
B A S E D T E M P E R A T U R E T R A N S M I T T E R
I N S T A L L A T I O N A N D O P E R A T I N G M A N U A L

WARRANTY

NOVUS Electronics provides the original purchaser of this instrument a one (1) year
warranty against defects in material and workmanship under the following terms:
• The one year warranty begins on the day of shipment as stated on the sales bill.
• During the warranty period all costs of material and labor will be free of charge
provided that the instrument does not show any evidence of misuse.
•
For maintenance, return the instrument with a copy of the sales bill to our
factory. All transportation and insurance costs should be covered by the owner
of the equipment.
• Should any sign of electrical or mechanical shock, abuse, bad handling or
misuse be evident the warranty voids and maintenance costs will be charged.
M I C R O P R O C E S S O R
T x R a i l 4 - 2 0 m A
MAN 5001492 A V1.2x
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