Technical Manual MIVI 8001
Ref. 128-41/5
16
3.4.
Universal analog inputs
They are all referenced to the same potential and isolated at 500 Veff from all the other signals.
Temperature
Sensor Pt 100
Ω
3-wire mode
-50 à 300°C
R
ligne
= 20
Ω
max, 0,5.10
-4
/
Ω
Viscosity/Thermal Drift
Compensation
Voltage
0-1 V
Accuracy
0,1% of the scale on the linear
0,12% of the scale on the RTD and the resistance
Temperature drift
All the inputs 100 ppm/°C
Sampling
100 ms
Rejection
Common Mode 120 dB to 250 Vac; serial mode 50 dB
We advise you to connect the logic inputs with shielded cables.
3.5. Logic
inputs
3 physical logic inputs are available El3 to El5.
They can be driven by contact free from potential or by an open collector. The polarization voltage
24V
is internal, the polarization current is 5mA.
1
⇒
Closed contact
Voltage between –0,6V and 10V
0
⇒
Open contact (impedance
≥
3.3 k
Ω
)
Voltage between 16V and 30V
The logic inputs are referenced to the same potential and galvanically isolated from all the
other potentials at 500 Veff.
We advise you to connect the logic inputs with shielded cables.
3.6.
Standard outputs (Relays 1 and 2)
The units has in standard 2 relays (250 Vac or 30 Vdc, 1 A). The internal protection networks allows a
leakage current of 1 mA for 250 Vac.
If these relays are used to commute some inductive charge, we advise you to add some RC networks
to the charge terminals (preferably) or to the contacts terminals. They will then lessen the electro-
magnetical phenomena.
3.7.
Viscosity current output (slot n°4)
It is a 4-20 mA or a 0-20 mA current output. The output resolution is 12 bits. The maximum load
resistance is 750
Ω
.
It is isolated from the rest of the device up to 500 Vac. Accuracy : ±0,1%. See § 3.11 for the
connections.
WARNING : The current output must not be connected to any external power supply. In this
case, the current output will be damaged.
3.8.
Supervisor digital RS
MODBUS SLAVE Protocol RS485/422 (2 or 4 wires) Baud rate from 300 to 19200 bauds.
