Operating Manual

IRS31Pro-UMB Operating Manual V10 / 01.2020
G. Lufft Mess- und Regeltechnik GmbH 16
7.2.1.1 Extension Table for IRS31Pro-UMB Passive Road Sensor
Total
Distance
RS485
Terminator
Required
IRS31Pro-
UMB
Original
Cable
Extension Cable
A-2ZF(L)2Z
Nx2x0.8
Wire
Range
0.5mm
2
0.8mm
2
Power Supply
Wire Bundle
Total Wire
Pairs
[m] max. [m] up to…[m] x times N
100 - 100 -- --
200 - 50 150 3x 4
300 - 50 250 4x 6
400 YES 50 350 6x 10
500 YES 50 450 7x 10
600 YES 50 550 9x 10
700 YES 50 650 10x 20
800 YES 50 750 11x 20
900 YES 50 850 13x 20
1000 YES 50 950 14x 20
1100 YES 50 1050 16x 20
1200 YES 50 1150 17x 20
Notes:
Recommended extension cable: A-2YF(L)2Y Nx2x0, 8 or similar;
Core pair 2x (2 times) means 2 pairs of wires, e.g. 2x2x0.8, because 2 individual wires are 1 pair for the
power supply (+ & -).
RS485 termination resistance required means that a resistance of 120 ohms should be connected parallel
to the RS485 2-wire interface, either on the sensor inlet or sleeve.
7.3 Connecting the Supply Cable
The road sensor supply cable is connected to the power supply and the bus system (e.g. ISOCON-UMB)
in the control panel.
The data lines and the supply voltage of each IRS31Pro-UMB must be electrically isolated from
each other. This can be achieved for example by means of a LUFFT ISOCON-UMB. If the sensor is
operated without electrical isolation, the sensor may be destroyed and the warranty expires!
The screening of the connecting cable MUST be laid to earth in the control panel! Under no
circumstances is it allowed to connect the negative supply voltage (GND1) with the cable shield
(connected to earth) of the sensor.
For Sensors with 12 VDC power supply the end of the cable in the cabinet is marked by the
manufacturer with a red heat shrink tubing!