Connecting; Wiring Plan; Switch-On Phase; Setup - SICK LFC Manual De Instrucciones

6 Setup

steam or high pressure, it is very important that
the plug is screwed on correctly.
5.2

Connecting

Instrument versions
Abb. 16: LFC - M12 x 1 plug
M12 x 1 plug connection
This plug connection requires a prefabricated
cable with plug. Depending on the version,
protection IP66/IP67 or IP69.
5.3

Wiring plan

For connection to binary inputs of a PLC.
M12 x 1 plug
2 1
3
4
Abb. 17: Wiring plan M12 x 1 plug - Transistor output,
three-wire
1 Voltage supply
2 PNP switching
Contact, plug con-
nector
1
2
3
4
5.4

Switch-on phase

After switching on, the device first carries out a
self-check:
•
Internal check of the electronics
•
LED illuminated on the device lights "red -
yellow - green"
The current measured value is then output on
the signal cable.
22
1
2
3
4
5
+
1
out 2
out 1
2 2
-
Function/Polarity
Voltage supply/+
Transistor output 2
Voltage supply/-
Transistor output 1
6 Setup
6.1 Indication of the switching
status
The switching status of the electronics can be
checked via the signal lamps (LEDs) integrated
in the upper part of the housing.
The signal lamps have the following meaning:
•
Green lights up - power supply connected,
sensor output high-impedance
•
Green flashing - Maintenance required
•
Yellow lights up - power supply connected,
sensor output low impedance
•
Red lights briefly - function test during inst-
rument start (for 0.5 s)
•
Red lights - shortcircuit or overload in the
load circuit (sensor output high-impedance)
•
Red flashes - Error on the sensor or the
electronics (sensor output high impedance)
6.2

Function table

The following table provides an overview of
the switching conditions depending on the set
mode and the level.
Switching Control
status lamp
Output Yellow
closed
open
Fault
7

Diagnostics and servicing

7.1

Maintenance

Maintenance
If the device is used properly, no special mainte-
nance is required in normal operation.
Cleaning
The cleaning helps that the type label and mar-
Control Control
lamp lamp
Green Red
LFC • Transistor (PNP)