Novus TxIsoRail User manual

NOVUS AUTOMATION 1/3
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 MΩ
Pt100: Excitation: 180 µA, 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 to10 Vdc.Impedance >>1 MΩ.
* 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, linearwith respect to the measured signal.
Resolution: 0.001 mA (14 bits)
Total Accuracy: Better than 0.3 % of the maximum span for
thermocouplesand 0.2% for Pt100 and voltage;
Response Time: < 500 ms
Isolation: Between the sensor and the 4-20 mA loop (1000V / 1 min).
Power Supply:12 to 35Vdc, across the transmitter;
Maximum Load (RL): RL (max.)= (Vdc – 12) / 0.02 [Ω]
Were: Vdc= Power supplyvoltage
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 fileand followtheinstructions.
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.
1and 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.

NOVUS AUTOMATION 2/3
The TxConfig screen in shown in Fig 3.
Fig. 3– TxConfig main screen
The fields in the screen mean:
1. Input Sensor: Choose the desired temperature sensor among the
availableoptions.See Table 1.
2. Measuring Range: Definesthe beginning and the end of the range.
When the Low Scale Limit isconfigured with a value higher than the Full
Scale Limit, the current output will have a decrescent behavior (20~4
mA).
The values configured in these fields can not be beyond the sensor
measuring range. The minimum span value has to be observed as well
(see Table 01).
3. Line Noise Rejection: The transmitter incorporates a digital filter to
cancel the induced noise from the 50 or 60 Hz systems. For better
performance, selectthe line frequency used in your country.
4. Sensor Failure: establishes the transmitter output behavior (upscale or
down-scale) in the presence of a sensor fail.
5. Zero Correction: Allows for small sensor corrections.
6. Device Information: The Device Information box contains relevant data
concerning a particular transmitter. Please pass along this information
when contacting the technical assistance department.
7. Apply: Sendsa new configuration to the transmitter.
8. Read Device: Brings to the screen the current transmitter parameters
configuration.
Note: The factory default configuration is (unless otherwise specified or
ordered):
Pt100 input, 0 to 100 ºC
60 Hz filtering and upscale (20 mA) output for sensor fail.
The transmitter must be powered in order to be configured. The TxConfig-USB
interface provides the necessary power. The TxConfig-RS232 interface,
however, requires an auxiliary supply to guarantee a reliable communication
withthe computer.
An external 9 V battery can be used for this purpose (Fig. 1). An alternative is
to configure the transmitter while it is in operation; this way, the needed energy
issuppliedbythecurrentloop,as inFig. 4.
Fig. 4– TxConfig Interface connections – Loop powered
The TxConfig interfaces contain dedicated circuitry for proper
communication between transmitters and computer. Always make
use of the TxConfig interfaces for configuration purposes, otherwise
the transmitters may get damaged, voiding the warranty.
MECHANICAL INSTALLATION
The transmitter is intended for DIN rail mounting. Its drawing is presented in
Fig. 04.
Fig. 4– Transmitter dimensions
ELECTRICAL CONNECTIONS
Figure below shows the transmitter connections to the sensor and power
supply. Terminals 1, 2 e 3 are used for sensor input. For 2-wire Pt100,
terminals2 and 3 shall be connected together.
Fig. 5– Transmitter wiring (Pt100)
Fig. 6– Transmitter wiring (Thermocouple)
The LOAD represents the input shunt of an instrument measuring the 4-20
current loop.
Electrical Connections – 0-10 Vdc Input
For 0-10 Vdc input, the transmitter requires an internal hardware
configuration change. Please open the instrument case and change the
jumpershown in Fig. 07.
•Position1-2 : 0-10Vdc input
•Position2-3 : all other input types
Fig. 7– Jumper position for 0-10 Vdc input

NOVUS AUTOMATION 3/3
OPERATION
All input types and the 4-20 mAoutput current are factory calibrated.
However, if desired by the user, a manual offset trim is implemented to
provide fine adjustments to the signal in the field. This is accomplished by
the front key ZERO, located under the frontal label in order to avoid
accidental adjustments. Using a small tool (2 mm diameter), press and hold
the desired key for at least 2seconds to increase or decrease the output
current. When the output current is reached, the keymust be released.
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.
The user must choose the sensor and configure the sensor span which best
suit the application. The sensor span must not exceed the maximum range
supported bythe transmitter for a particular sensor,neitherbe lower than the
minimum span.
It is important to note that the transmitter accuracy is related to the total
sensor span of a sensor, regardless of the output scale (span) configured.
Example:
•Pt100;maximuminputspan of–200to+650°C, 0.2% accuracy.
•Maximum error:1.2 °C (0.2 % of 800 °C)
•This erroris the same no matter iftotalspan isused (-200 to 650 °C)
or a narrower user-defined span is used, like 0 to 100 °C.
Note: When using a Pt100 simulator, make sure the transmitter Pt100
excitation current (0.18 mA) is compatible with the simulatorspecification.
SAFETY INFORMATION
Any control system design should take into account that any part of the
system has the potential to fail. This product is not a protection or safety
device and its alarms are not intended to protect against product failures.
Independent safety devices should be always provided if personnel or
property are at risk.
Product performance and specifications may be affected by its environment
and installation. It’s user’s responsibility to assure proper grounding,
shielding, cable routing and electrical noise filtering, in accordance with local
regulations, EMC standards and good installation practices.
SUPPORT AND MAINTENANCE
This product contains no serviceable parts inside. Contact our local
distributorin case you need authorized service. Fortroubleshooting, visit our
FAQ at www.novusautomation.com.
LIMITED WARRANTY AND LIMITATION OF LIABILITY
NOVUS warrants to the original purchaser that this product is free from
defects in material and workmanship under normal use and service within
one (1) year from the date of shipment from factory or from its official sales
channel to theoriginal purchaser.
NOVUS liability under this warranty shall not in any case exceed the cost of
correcting defects in the product or of supplying replacement product as
herein provided and upon the expiration of the warranty period all such
liability shall terminate.
For complete information on warranty and liability limitations, check
appropriate section in ourweb site: www.novusautomation.com.