Novus TXMINI-M12 Operating Manual

TXMINI-M12 / TXMINI TRANSMITTER
OPERATING MANUAL – V1.0x H

INTRODUCTION

The TxMini-M12 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-M12
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.
Terms of reference: 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 /
Maximum allowable cable resistance for RTD: 25
Sensor Type
Pt100 / Pt1000
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.
NOVUS AUTOMATION
Ω.
Ω.
Typical Minimum
Accuracy Accuracy
0.1 % 0.2 %
Maximum
Sensor Type
Measurement Range
-200 to 650 °C
Pt100
(-328 to 1202 °F)
-200 to 650 °C
Pt1000
(-328 to 1202 °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)

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-M12 is not
electrically isolated from the transmitter's input.

SOFTWARE CONFIGURATION:

Fig. 1 – TxConfig II software main screen
Minimum
Measurement Range
40 °C
(104 °F)
40 °C
(104 °F)
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