Connection of IL-CU analog inputs
CO
M
AI
1
AI
2
-P
O
W
E
R
3x RESISTIVE
SENSOR
AI
3
Standard connection of three resistive sensors
to analog inputs.
Common point of resistive sensors is
connected to COM terminal for accurate
measuring.
CO
M
AI
1
AI
2
-P
O
W
E
R
+24V
3x 120 ohm
2x SENSOR
4 - 20 mA
AI
3
Three current output sensors connection to
InteliLite.
External resistors 120 ohms each are
connected between minus power supply
terminal of IL-CU and analog inputs.
Current sensor connecting reduces the analog
input resolution by less than 50% against
resistive sensor.
Analog input common terminal COM has to be
connected to IL minus Power supply terminal.
2x
470
CO
M
-P
O
W
E
R
AI
1
AI
2
AI
3
Mixed connection of InteliLite analog inputs:
AI1 – binary input
AI2 – three state input
AI3 – analog resistive input
Common point of IL-CU analog inputs is
connected to COM terminal.
Analog inputs are designed for resistive sensors with resistance in range of 0
Ω
to 2,4k
Ω
.
To ensure a proper function use shielded cables, especially for length over >3m.
Current output transducers
IL-CU analog inputs are mainly designed for resistor sensors.
In special case transducers to 4-20mA output can be used for oil measuring (10.0Bar or 6.0Bar). Use
predefined 4-20mA/100 or 4-20mA/60 sensors.
This method reduces the input resolution by less than 50%.
Some types of transducers are not
suitable for connection to InteliLite analog inputs because of influencing by InteliLite analog input.
As binary input
Open, close state are detected, threshold level is 750
Ω
.
As three state input
Open, close and failure state are detected. Threshold level is 750
Ω
, failure is detected when circuit
resistance is <10
Ω
or > 2400
Ω
.
InteliLite – MRS10/11/15/16, SW version 2.2, ©ComAp – November 2004 16
IL-MRS-2.2.pdf