Tecfluid TR420 - Manual (Page 6)

5. TECHNICAL CHARACTERISTICS
5.1 Power supply
Standard: 220 VAC 50/60 Hz
Other: 240, 110, 24 VAC 50/60 Hz. 24 VDC
Power consumption: Less than 1 VA.
5.2 Analog output
The analog outputs are active. This means that the TR420 supplies the electric current to the
output. The loads that can be applied to the output are the following:
0-20 mA and 4-20 mA. Maximum resistive load: 350 Ω
0-5 V and 1-5 V.
Minimum resistive load: 100 kΩ
0-10 V and 2-10 V. Minimum resistive load: 200 kΩ
5.3 Level probe input
The TR420 is designed to work with a probe with 1000 ohms per meter of length. In order to
adapt the probe to the LE-70 a fixed resistor of 10,000 ohm per meter of probe length is
used, this means that the adapting resistor will have ten times the maximum resistance of the
probe. The adapting resistor must be a metal film type with a thermal coefficient of 50 ppm.
5.4 General characteristics
Ingress protection: IP40
Ambient temperature range: From 0 to 60ºC
Conforms with LV Directive 73/23/EEC
Conforms with EMC Directive EMC 89/336/EEC
Conforms with WEEE Directive 2002/96/EC
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