itsensor TXMINI-DIN43650 Transmitter User Manual

itsensor TXMINI-DIN43650 Transmitter

INTRODUCTION

The TxMini-DIN43650 Transmitter is a 4-20 mA 2-wires temperature transmitter for head mount, powered by the current loop. Its configuration is accomplished by connecting the TxConfig-DIN43650 interface configuration. The configuration does not require that the transmitter be powered.
The output current is linearized according to the selected input sensor and adjusted to the configured range.

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 IEC 60751 (ITS-90).
Pt1000: Type 3-wire, Excitation 0.8 mA, α= 0.00385, according 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.
Calibration error: < 0.12 % (RTD).
Terms of reference: ambient: 25 ° C; 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.

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-wired; 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
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.
Thread Type: M24x2
Connection Wire Cross Section: 0.14 a 1.5 mm² (*)
When soldering the Pt100 wires, each wire should be inserted no more than 1 mm into the hole.

Table 2 – Sensors accepted by the transmitter

Sensor Type| Maximum Measurement Range| Minimum Measurement Range
---|---|---
Pt100| -200 to 650 °C| 40 °C
| (-328 to 1202 °F)| (104 °F)
Pt1000| -200 to 650 °C| 40 °C
| (-328 to 1202 °F)| (104 °F)

Order Codes:

• P/N: 8806050406: TxMini-DIN43650 transmitter;
• P/N: 8816021069: TxConfig-DIN43650 Interface.

CONFIGURATION

The sensor offset can be adjusted through the TxConfig II software. The USB cable may be connected to the transmitter without causing any measurement errors.
The user 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.

The communication interface TxConfig-DIN43650 is not electrically isolated from the transmitter’s input.

SOFTWARE CONFIGURATION

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: Select the type of sensor to be used. See Table 1.

3. Measuring Range: Sets de measurement range of the transmitter.
   Lower Range Limit: equivalent temperature for a current of 4 mA. Upper
   Range Limit: equivalent temperature for a current of 20 mA. Sensor Range
   The values chosen cannot exceed the range of sensor shown in this field. See Table 1 of this manual.
   Minimum Range
   Do not set a lower band (span) that the Minimum Range indicated below in this same field. See Table 1 of this manual.

4. Sensor Failure: It establishes the output behavior, when the transmitter indicates a failure:
   Minimum: output current goes to < 3.8 mA (down-scale), typically used for refrigeration.
   Maximum: output current goes to > 20.5 mA (up-scale), typically used for heating.

5. Zero Correction: It corrects small deviations presented in the transmitter output, for example, when the sensor is replaced.

6. Send Configuration: It applies the new setup. Once sent, the setup will be immediately adopted by the transmitter.

7. Read Configuration: Reads the current setup in the transmitter connected. The screen now presents the current setup that may be changed by the user.

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, the user can define a specific setup.

MECHANICAL INSTALLATION

Transmitter TxMini-DIN43650 was designed to be installed in tubes and other small places. 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.

ELECTRICAL INSTALLATION

• Polyamide enclosure.
• Section of the cable used: 0.14 to 1.5 mm ²

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.

POWER AND COMMUNICATION CONNECTION
Terminal 3 is used to communicate with the transmitter (TxConfig-DIN43650 interface must be used).
Terminal 4 can be connected to cable shield, if needed.

| 1| LOOP +
---|---|---
2| LOOP –
3| COMM
4| SHIELD

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.

For appropriate cable resistance compensation, the same cable type should be used for all terminals. Maximum wire resistance is 25 Ω. Usage of a 3 or 4 wire with conductors of equal length and gauge is recommended.

OPERATION

The sensor offset can be adjusted through the TxConfig II software. The USB cable may be connected to the transmitter without causing any measurement errors.
The user 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.

WARRANTY

Warranty conditions are on our website www.novusautomation.com/warranty.

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