Operating Manual V8.2/03.2017
Non Invasive Road Sensor
22
G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany
Fig. 8: Connector
9
Connections
There is an 8 pole plug-in terminal on the bottom of the equipment. This serves to connect
the supply voltage and interface. The connection cable must be ordered separately in the
desired length (15 or 50 meters) (see page7).
9.1
Equipment Connector
9.2
Pin Assignment
White
Ground supply voltage
(7)
Brown
Positive supply voltage
(8)
Green
RS485_A / SDI-12 GND
(5)
Yellow
RS485_B / SDI-12 Data Line (2)
Grey
Not used
(4)
Pink
Not used
(1)
Blue
Not used
(6)
Red
Not used
(3)
Cable markings are in accordance with DIN 47100.
Note: the connection cable screen must NOT be laid to ground in the control panel.
If the equipment is not connected correctly:
It may not function.
It may be permanently damaged
The possibility of an electrical shock may exist under certain circumstances
9.3
Supply Voltage
The supply voltage for the sensor is 12 - 24VDC. The power supply unit used must be
approved for operation with equipment of protection class III (SELV).
Note:
the supply voltage has to be available at
the sensor
! Make sure that the voltage drop
of the supply line is considered! See page 34 for more details.
9.4
RS485 Interface
The equipment has an electrically isolated, half-duplex, 2 wire RS485 interface for
configuration, measurement polling and the firmware update.
See page 34 for technical details.
3
1
5 2
8
4
7
6
View on cable socket
solder connection
