TxMini-M12 Transmitter
NOVUS AUTOMATION
3/3
Fig. 4
– TxMini-M12 / TxMini
Connection Diagram
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.
Fig. 5
– Input 3-wire Pt100 / Pt1000
M12 CABLE CONECTION
See below guidelines for making or purchasing the M12 cable.
Fig. 6
– 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
.
Usage of a 3 or 4 wire with conductors of equal length and gauge is
recommended (cable not supplied).
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 web site
www.novusautomation.com/warranty
.
