ENGLISH 2/8
General description
Digital converter with four measuring channels , for platinum or nickel thermistors, which
are independent and isolated from each other.
1.5 kV
insulation between the inputs, the power supply and serial communication line.
A
Easy and fast wiring of power supply and serial communications by means of Seneca
bus for DIN rail IEC EN 60715.
Communication parameters can be configured by DIP-switch or through USB port from
PC or Android device.
1 RS485 serial communication port with MODBUS-RTU protocol, 32 nodes maximum.
Inputs protected against ESD.
High acquisition speed and possible r calibration on the field.
e
Measurement of thermistors: PT100, PT500, PT1000, NI100, with 4, 3 or 2 wires
wiring.
Measurement of temperature or resistance.
Eight level filter programmable in order to stabilise reading.
50 Hz or 60 Hz programmable frequency rejection filter.
The measurement available: floating point, reverse floating-point, fixed point at 16 bits,
tenths of degrees with sign for temperature, and tenths of Ohms or hundreds of Ohms
for resistance.
Three selectable acquisition speeds (two with 13 bit resolution, one with 14 bit resolution).
Programmable value in case of fault or freezing of last reading.
Compensation of three wire resistor on the average value of the connection resistor.
Technical Specifications
Input
PT100 - EN 60751/A2 (ITS-90)
Input
PT500 - EN 60751/A2 (ITS-90)
Measuring range:
-200 – +650 °C
Measuring range:
-200 – +750 °C
Resistance range:
18.5 Ω – 330 Ω
Resistance range:
92.5 Ω – 1800 Ω
Fault signalling:
Rx <18 Ω, Rx >341 Ω
Fault signalling:
Rx < 90 Ω, Rx > 1851 Ω
Current on sensor:
875 A nominal
m
Current on sensor:
333 A nominal
m
Resistance of cables:
20 Ω maximum per wire
Resistance of cables:
30 Ω maximum per wire
Input
PT1000 - EN 60751/A2 (ITS-90)
Input
NI100
Measuring range:
-200 – +210 °C
Measuring range:
-60 – +250 °C
Resistance range:
185 Ω – 1800 Ω
Resistance range:
69 Ω – 295 Ω
Fault signalling:
Rx <180 Ω, Rx >1851 Ω Fault signalling:
Rx <60 Ω, Rx >301 Ω
Current on sensor:
333 A nominal
m
Current on sensor:
875 A nominal
m
Resistance of cables:
30 Ω maximum per wire
Resistance of cables:
30 Ω maximum per wire
Rear IDC10 connector (port RS485)
Front Micro USB
1200 – 115200 Baud.
2400 Baud, Address 01, Parity NO, Stop bit 1,
Delay on the answer NO, Time Out 3 s
Protocol
Modbus-RTU
Protocol
Modbus-RTU
MI00441
-3
-E
N
