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EOSI - Rev. 1

Programmable temperature transmitter with mineral insulated probe and Modbus RTU digital output (RS485)
Temperature transmitter with overmolded IP67 casing with M12 output connection. By using a single cable, it is possible to build a sensors network which can be directly connected to a PLC or a PC equipped with a supervisory software (SCADA). These devices are equipped with M12 connectors allowing for an easy and quick installation with degree of protection IP67.
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Technical specifications
Electrical technical data
Power supply
9 ÷32 Vdc (polarity protected)
Electronic board input
RTD Pt100 / Pt1000 (α= 0,00385 / α= 0,003916) 2, 3 o 4 wire connection
Sensor exciting current
~100 uA
Sensor wire maximum resistance
2 wire connection: 40 ohm
3 or 4 wire connection: 20 ohm/wire
Accuracy (*)
(*) @25°C
Converter: ≤ ±0.2°C of the range (-200 ÷ 850)°C
Sensor element: Pt100 class A up to 300 °C according to IEC751
Temperature influence (*)
(*) deviation from 20°C
< ±0.25°C/25°C of the range (-200 ÷ 850)°C
Electronic board operating temperature
-40 ÷80°C
0,1 °C
Linear error
Sensor error compensation
(±5°C) over two points
Current consumption
<4mA with RS485 (<10mA at power on for approx. 8mS)
Communication protocol
Modbus RTU (max. baud rate 38.400)
Serial interface
RS-485 (not insulated)
Input/Output insulation
Maximum connection distance
1000 meters, this distance depends on the power supply voltage and the type of cable used to connect the various devices
Maximum devices on network
maximum 32 (over is required to add a serial repeater)
Maximum 256 nodes (it is recommended to use isolators / repeaters along the serial line)
Indicator LED
Blue LED, power supply and device operations indicator
Red LED (ERR), sensor error indicator
White LEDs (TX and RX), serial transmission and reception indicators
International protection marking (*)
(*) According to IEC 60529
In accordance to EN 61326-1:2013 (CE)
In accordance to BS EN 61326-1:2013 (UKCA)
By using the EVOPLATFORMSET configuration kit (a PC with Windows OS is required).
Main device design parameters
Maximum and minimum temperature peak measured
Temperature offset for measurement correction
Serial communication and power-on watch-dog
Temperature tenths °C
RTD sensor range
-50 ÷500°C
1 input connector M12 x 4 male according to IEC 61076-2-101 STANDARDS (power supply / serial interface)
Material body
Sheet material
Sensor construction type
with mineral compact insulation (M.I.C.)
Stem length L
150 mm
Other lenghts availabloe on request
Sheath diameter d
Ø 6 mm
Ø 3 mm
14g (L=100mm e Ø3mm); 28g (L=100mm e Ø6mm)
28g (L=100mm e Ø=6mm)
M.I.C. min. bending radius
3 times the outer diameter (except the sensing tip which length is ~30 mm)
"T" distributor Female / Male / Female M12 x 5 poles
Extension cables with M12 overmoulded female and male connectors
Wall mounting bracket
EVOPLATFORMSET configuration kit