Novus TXMINI-M12 User manual

NOVUS AUTOMATION 1/5
TXMINI
-M12 / TXMINI TRANSMITTER
USER GUIDE
– V1.0x I
1. INTRODUCTION
TxMini-M12 Transmitter is a 4-20 mA 2-wires temperature
transmitter for head mount, powered by the current loop. It can be
configured using SigNow or TxConfig II software or SigNow app.
The output current is linearized according to the selected input
sensor and adjusted to the configured range.
2. SPECIFICATIONS
Sensor Input: User defined. The supported sensors are listed in Table
1, along with their maximum ranges.
Pt100: Type 3-wire, Excitation 0.8 mA, α= 0.00385, according to
IEC 60751 (ITS-90).
Pt1000: Type 3-wire, Excitation 0.8 mA, α= 0.00385, according
to NBR 13773. IEC 60751 (ITS-90).
For 2-wire sensors, tie terminals 3 and 4 together.
Switch-on delay: < 2.5 s. The accuracy is only guaranteed after 15
minutes.
Reference terms:Ambient: 25 ° C (77 °F); voltage: 24 Vdc, load:
250 Ω; settling time: 15 minutes.
Temperature effect:<± 0.2 % / 25 °C.
Response time: Typical 1.6 s.
Maximum voltage allowed at input terminals no sensor:3 V.
RTD current:800 µA.
RTD cable resistance effect: 0.005 °C / Ω.
Maximum allowable cable resistance for RTD: 25 Ω.
SENSOR TYPE
TYPICAL
ACCURACY
MINIMUM
ACCURACY
Pt100 / Pt1000 0.1 % 0.2 %
Table 1 –Calibration error, percentage of the full measurement range
Power supply influence: 0.006 % / V typical (percentage of the full
measure range).
Output:4-20 mA or 20-4 mA current, 2-wire; linear in relation to the
temperature measurement by the selected sensor.
Output resolution: 2 µA.
Power supply: 8 to 35 Vdc, across the transmitter.
Maximum load (RL):RL (max.) = (Vdc – 8) / 0.02 [Ω]
Where: Vdc = Power supply voltage (8-35 Vdc)
Operating temperature: -40 to 85 °C (-40 to 185 °F).
Humidity: 0 to 90 % RH.
Electromagnetic compatibility:EN 61326-1:2006.
No electrical isolation between input and output.
Internal protection against polarity inversion.
Cold junction compensation for thermocouples.
Connection wire cross section: 0.14 a 1.5 mm²
Screw tightening: 0.8 Nm.
Housing: Polyamide.
SENSOR
TYPE
MAXIMUM
MEASUREMENT
RANGE
MINIMUM
MEASUREMENT
RANGE
Pt100
-200 to 650 °C
(-328 to 1202 °F)
40 °C
(104 °F)
Pt1000 -200 to 650 °C
(-328 to 1202 °F)
40 °C
(104 °F)
Table 2 –Sensors accepted by the transmitter
Order codes:
-P/N: 8806060406: TxMini-M12 transmitter.
-P/N: 8816021079: TxConfig-M12 Interface.
-P/N: 8806060506: TxMini Transmitter (transmitter can only be
configured during production).
-P/N: 8806065000: M12 Connector Cable for TxMini-M12
(accessory).
3. CONFIGURATION
The factory setting of the transmitter is for Pt100 input with a range of
0 to 100 °C and output for maximum current in case of error. When
using the transmitter with this setting, no further commissioning is
required. In this case, its installation can be carried out immediately.
When it is necessary to change the configuration of the equipment,
you should use SigNow software, TxConfig II software, or SigNow
app.
To configure the equipment through any of the software, you must
connect the TxConfig-M12 Configuration Interface (purchased from
the manufacturer or its authorized representatives) to the USB port of
the computer used and run the selected software.
To configure the device via the SigNow app, you need to use an
OTG cable with the TxConfig-DIN43650 Configuration Interface and
proceed with the recognition process (see SMARTPHONE
CONNECTIONS chapter).
On NOVUS website, you can download the configuration software for
free. To install it, simply run the file SigNowSetup.exe or the file
TxConfigIISetup.exe and follow the instructions in the installer.
The SigNow setup application can be downloaded for free from the
Google Play Store or the App Store.
The communication interface TxConfig-
M12 is not
electrically isolated from the transmitter input.

TxMini-M12 Transmitter
NOVUS AUTOMATION 2/5
3.1 SOFTWARE AND APP
3.1.1 SIGNOW SOFTWARE
When you run the SigNow software and make the connection to the
equipment, the following screen will be displayed:
Figure 1 –SigNow settings screen
The bottom part of the screen displays information about the model,
serial number, and firmware version.
The configuration screen is divided into 2 sections: General and
Diagnostics.
In the General screen (shown above), you can configure the
equipment by setting values and information for the following
parameters:
1. Sensor type: It allows you to select the type of sensor to be
used. See Table 1.
2. Temperature unit: It allows you to set the temperature unit to be
used.
3. Lower limit: It allows you to set the minimum limit for the
transmitter measurement range.
4. Upper limit: It allows you to set the minimum limit for the
transmitter measurement range.
5. Output status (Sensor failure): It allows you to establish the
output behavior when the transmitter indicates a failure.
6. Output type: It allows you to define the type of output to be
used: 4 to 20 mA or 20 to 4 mA.
7. Zero correction: It allows you to correct small deviations
presented in the transmitter output, for example, when replacing
the sensor.
In the SigNow manual, available on NOVUS website, you can find
more information about the diagnostic process.
3.1.2 TXCONFIG II SOFTWARE
When you run the TxConfig II software and make the connection to
the equipment, the following screen will be displayed:
Figure 2 –TxConfig II software main screen
The fields in the screen mean:
1. General Information: This field shows information that identifying
the transmitter. This information should be sent to the
manufacturer in an eventual request for technical assistance.
2. Sensor: It allows you to select the type of sensor to be used. See
Table 1.
3. Measuring Range: It allows you to set de measurement range of
the transmitter.
Lower Range Limit: Equivalent temperature for a 4-mA current.
Upper Range Limit: Equivalent temperature for a 20-mA current.
Sensor Range: The values chosen cannot exceed the sensor
range shown in this field. See Table 1.
Minimum Range: Do not set a lower band (span) that the
Minimum Range indicated below in this same field. See Table 1.
4. Sensor Failure: It allows you to establish the output behavior
when the transmitter indicates a failure:
Minimum: The output current goes to < 3.8 mA (down-scale).
Typically used for refrigeration.
Maximum: The output current goes to > 20.5 mA (up-scale).
Typically used for heating.
5. Zero Correction: It allows you to correct small deviations
presented in the transmitter output, for example, when replacing
the sensor.
6. Send Configuration: It allows you to apply the new setup. Once
sent, the setup will be immediately adopted by the transmitter.
7. Read Configuration: It allows you to read the current setup in
the transmitter connected. The screen now presents the current
setup that may be changed by the user.
3.1.3 SIGNOW APP
When using an OTG cable and the TxConfig-M12 Configuration
Interface to connect the equipment to your smartphone and run the
SigNow app (see SMARTPHONE CONNECTIONS chapter), you
must first enable the use of TxConfig-M12.
The interface will act as an intermediary for the connection:
Figure 3 –Using TxConfig-M12

TxMini-M12 Transmitter
NOVUS AUTOMATION 3/5
After that, the app will recognize the equipment and show the main
screen:
Figure 4 –Main screen
To configure the equipment, just click the Configuration button.
Then, the app will show the main screen of the TxMini-M12
Configuration section:
Figure 5 –Information screen
This screen shows information about the equipment, such as name,
serial number, and firmware version.
When you open the Config section, you can configure the
parameters displayed in the SIGNOW SOFTWARE section.
In the SigNow manual, available on NOVUS website, you can find
more information about the buttons and the diagnostic process.
3.2 FACTORY SETTING
•Sensor: Pt100 3-wire, range 0 to 100 °C.
•Sensor failure: Upscale (maximum).
•0 °C zero correction.
•Unit: °C.
•Output: 4 to 20 mA.
Upon purchase order, you can define a specific setup.
4. SMARTPHONE CONNECTIONS
Smartphones with On the Go (OTG) technology can be directly
connected to the device via the Micro-USB input. Using the
TxConfig-M12 Configuration Interface, it is possible to recognize and
configure a TxMini-M12 by running the SigNow app.
To do this, as shown in Figure 6, you need to observe how to
connect the OTG cable to the equipment:
Figure 6 –OTG cable
Incorrect positioning of the cable tip can cause
the equipment not to be recognized by the app.
5. MECHANICAL INSTALLATION
TxMini-M12 Transmitter was designed to be installed in tubes and
other small places.
Vibrations, moisture and extreme temperatures, electromagnetic
interference, high voltage, and other interferences can permanently
damage the equipment and could cause error in the measured value.
Figure 7 –Dimensions of the transmitter

TxMini-M12 Transmitter
NOVUS AUTOMATION 4/5
6. ELECTRICAL INSTALLATION
•Polyamide housing.
•Section of the cable used: 0.14 to 1.5 mm².
6.1 INSTALLATION RECOMMENDATIONS
•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.
6.2 POWER AND COMMUNICATION CONNECTION
Terminal 2 is used to communicate with the transmitter (TxConfig-
M12 Configuration Interface must be used).
Terminal 4 can be connected to cable shield, if needed.
1 LOOP +
2 COMM
3 LOOP -
4
SHIELD
Table 3 –Power supply
Figure 8 –Output 4-20 mA (without M12)
Note: This model has no configuration interface and can only be
configured during production.
Figure 9 –TxMini-M12 / TxMini connection diagram
6.3 SENSOR CONNECTION
Terminals 1, 2, and 3 are dedicated to sensor connection. Terminals
1 and 2 must be shorted, as shown in the figure below:
Figure 10 –Input 3-wire Pt100 / Pt1000
M12 CABLE CONECTION
The information below shows how to make or buy an M12 cable:
Figure 11 –Connecting pins for M12 cable mounting
For appropriate cable resistance compensation, the same cable type
should be used for all terminals. Maximum wire resistance is 25 Ω.
It is recommended to use 3- or 4-wire with conductors of equal length
and gauge (cable not supplied).
7. OPERATION
You can change the sensor Offset via SigNow and TxConfig II
software or the SigNow app.
You must select the sensor and most suitable range to the process.
The chosen range must not exceed the maximum range specified for
that sensor and should not be narrower than the minimum range for
that same sensor.
It is important to note that the transmitter accuracy is based on the
maximum range of the sensor used, even when a narrower range is
programmed. Example:
•The Pt100 input has a max. range of –200 to +650 °C. Its
accuracy is 0.2 % of the full range, resulting in a maximum
allowed error of 1.7 °C (0.2 % of 850 °C).
•This error may be present even when a narrower range is
configured for the sensor (for example: 0 to 100 °C.).
Note: When Pt100 simulators are used with the transmitter, make
sure the excitation current of the simulator is compatible with the
Pt100 excitation current of the transmitter, which is 0.8 mA.

TxMini-M12 Transmitter
NOVUS AUTOMATION 5/5
8. WARRANTY
Warranty conditions are on our web site
www.novusautomation.com/warranty.