NOVUS AUTOMATION
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TxIsoRail 4-20 mA
MICROPROCESSOR BASED TEMPERATURE TRANSMITTER –
OPERATION MANUAL V1.0x F
SPECIFICATIONS
Sensor input: User defined. The supported sensors are listed in Table 1,
along with their maximum ranges.
Thermocouples: Types J, K, R, S, T, N, E and B to IEC 60584 (ITS-90).
Impedance >> 1 M
Ω
Pt100:
Excitation: 180
µ
A, 2 or 3-wire connection (for 2-wire
sensors, tie, terminals 2 and 3 together).
α
= 0.00385, according to IEC 60751 (ITS-90).
Voltage:
0 to 50 mVdc, 0 to 10 Vdc. Impedance >> 1 M
Ω
.
*
Note: 0-10 Vdc input type requires an internal jumper
switching.
0 to 20 mA, 4 to 20 mA. Impedance 15.0
Ω
(+ 1.9 Vdc).
Sensor Type
Range
Minimum measurement span
Thermocouple K
-150 to 1370 °C / -238 to 2498 ºF
100 °C
Thermocouple J
-100 to 760 °C / -148 to 1400 ºF
100 °C
Thermocouple R
-50 to 1760 °C / -58 to 3200 ºF
400 °C
Thermocouple S
-50 to 1760 °C / -58 to 3200 ºF
400 °C
Thermocouple T
-160 to 400 °C / -256 to 752 ºF
100 °C
Thermocouple N
-270 to 1300 °C / -454 to 2372 ºF
100 °C
Thermocouple E
-90 to 720 °C / -130 to 1328 ºF
100 °C
Thermocouple B
500 to 1820 °C / 932 to 3308 °F
400 °C
Pt100
-200 to 600 °C / -328 to 1112 ºF
40 °C
Voltage
0 to 50 mV
5 mV
*
0 to 10 V
1 V
Current
0 to 20 mA
2 mA
4 to 20 mA
2 mA
Table 1 – Transmitter input sensors
Output: 2-wire 4-20 mA, linear with respect to the measured signal.
Resolution: 0.001 mA (14 bits)
Total Accuracy:
Better than 0.3 % of the maximum span for
thermocouples and 0.2 % for Pt100 and voltage;
Response Time: < 500 ms
Isolation: Between the sensor and the 4-20 mA loop (1000 V / 1 min).
Power Supply: 12 to 35 Vdc, across the transmitter;
Maximum Load (RL): RL (max.)= (Vdc – 12) / 0.02 [
Ω
]
Were: Vdc= Power supply voltage
Operating Temperature: -40 to 85 °C
Humidity: 0 to 90 % UR
Electromagnetic Compatibility: EN 50081-2, EN 50082-2
Internal protection against polarity inversion.
Cold junction compensation for thermocouples.
CONFIGURATION
If the transmitter is already configured as required by the application (sensor
type, range, etc), it may be installed and used right away. However, if a
distinct configuration is required, this can be done through the TxConfig
software and the TxConfig Interface.
The TxConfig interface and software can be purchased from the manufacturer
or at its authorized distributors and representatives. Updates for the software
are available at our website. To install the TxConfig software, run the
Tx_setup.exe file and follow the instructions.
Serial port configuration errors may occur when other devices are
sharing the same port (ex.: Palm Hot Synch). Close all serial port
applications prior to using the TxConfig software.
The TxConfig interface connects the transmitter to the PC, as shown in Fig.
1 and 2. There are two types of interface: TxConfig-RS232 and TxConfig-
USB.
Fig. 1 – TxConfig Interface connections model RS232
Fig. 2 – TxConfig Interface USB connections
Once the connection is accomplished, the software shows the configuration
options of the transmitter model attached. Access the Help for usage
instructions.