TxRail-USB Temperature Transmitter
0555 0035-01, 0555 0035-02
0141 0315-951 27.09.2021
B+B Thermo-Technik GmbH | Heinrich-Hertz-Str. 4 | D-78166 Donaueschingen
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Technische Änderungen vorbehalten
Fon +49 771 83160 | Fax +49 771 831650 | [email protected] | bb-sensors.com
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Recommended torque fort he connection screws: 0.8 Nm
Recommendations for Installation
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Conductors of small electrical signals must be distant from Power supply and high-tension/current conductors, preferably passing
through grounded conduits.
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A specific electrical power supply network should be provided for instruments use only
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In controlling and monitoring applications, possible consequences of any system failure must be considered in advance.
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RC filters (47R an 100nF, serial) in inductor charges (contactors, solenoids, etc.) are recommended
Electrical Connections
The figures below show the electrical connections required. The terminals 1, 2, 3 and 4 are dedicated to the sensor connection. LOAD
represents the 4-20 mA current or 0-10 V voltage measuring device (indicator, controller, recorder, etc.).
6.2.1
Pt100 2-wires / NTC
Note
: When the Pt100/Pt1000 2-wire the terminals 1 and 3 must be interconnected,
according to the figure below. To use the Pt100/Pt1000 2-wire, you must configure the
Pt100/Pt1000 3-wire option in TxConfig II. The Pt100/Pt1000 wire length should be less than
30 cm to
maintain the measurement error within specifications (electrical
resistance).
6.2.2
Pt100 3-wires
6.2.3
Pt100 4-wires
Pt100 3 and 4-wire
: For appropriate cable resistance compensation
they should be equal for all legs. Maximum wire resistance is 25 Ω per
wire leg. Usage of a 3 or 4 wire with conductors of equal length and gauge is recommended.
6.2.4
Thermoecouples and 0 – 50 mV
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