Pepperl+Fuchs LC10 Series User manual

LC10-*
Laying loops for Loop detector
LC10-1 and LC10-2
FACTORY AUTOMAT ON
MANUAL

With regard to the supply of products, the current issue of the following document is ap-
plicable: The General Terms of Delivery for Products and Services of the lectrical Indus-
try, published by the Central Association of the lectrical Industry (Zentralverband
lektrotechnik und lektroindustrie (ZV I) e.V.) in its most recent version as well as the
supplementary clause: " xpanded reservation of proprietorship"
Manual LC10-*

Manual LC10-*
2
1 ntroduction....................................................................................
1.1 Contents..................................................................................................
1.2 Target Group, Personnel........................................................................
1.3 Symbols Used ........................................................................................
2 General safety instructions ..........................................................
3 Product Description ......................................................................
3.1 Overview .................................................................................................
3.2 Use and Application ..............................................................................
3.3 ndicators and Operating Controls.......................................................
3.3.1 LC10-1-* ..............................................................................................
3.3.2 LC10-2-* ..............................................................................................
3.4 nterfaces and connections ..................................................................
3.5 Dimensions.............................................................................................
4 nstallation......................................................................................
4.1 Preparation .............................................................................................
4.1.1 Laying loops.........................................................................................
4.1.2 Number of loop windings .....................................................................
4.1.3 Loop test..............................................................................................
4.2 nstallation ..............................................................................................
5 Commissioning..............................................................................
5.1 Test function ...........................................................................................
5.2 Loop geometry .......................................................................................
5.3 Loop interference...................................................................................
5.4 nfluencing variables .............................................................................
6 Troubleshooting.............................................................................

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Manual LC10-*
Introduction
1 Introduction
1.1 Contents
This document contains information that you need in order to use your product throughout the
applicable stages of the product life cycle. These can include the following:
■ Product identification
■ Delivery, transport, and storage
■ Mounting and installation
■ Commissioning and operation
■ Maintenance and repair
■ Troubleshooting
■ Dismounting
■ Disposal
The documentation consists of the following parts:
■ Present document
■ Instruction manual
■ Datasheet
Additionally, the following parts may belong to the documentation, if applicable:
■ U-type examination certificate
■ U declaration of conformity
■ Attestation of conformity
■ Certificates
■ Control drawings
■ Additional documents
1.2 Target Group, Personnel
Responsibility for planning, assembly, commissioning, operation, maintenance, and
dismounting lies with the plant operator.
Only appropriately trained and qualified personnel may carry out mounting, installation,
commissioning, operation, maintenance, and dismounting of the product. The personnel must
have read and understood the instruction manual and the further documentation.
Prior to using the product make yourself familiar with it. Read the document carefully.
Note!
This document does not substitute the instruction manual.
Note!
For full information on the product, refer to the instruction manual and further documentation on
the Internet at www.pepperl-fuchs.com.

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Introduction
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1.3 Symbols Used
This document contains symbols for the identification of warning messages and of informative
messages.
Warning Messages
You will find warning messages, whenever dangers may arise from your actions. It is mandatory
that you observe these warning messages for your personal safety and in order to avoid
property damage.
Depending on the risk level, the warning messages are displayed in descending order as
follows:
nformative Symbols
Action
This symbol indicates a paragraph with instructions. You are prompted to perform an action or
a sequence of actions.
Danger!
This symbol indicates an imminent danger.
Non-observance will result in personal injury or death.
Warning!
This symbol indicates a possible fault or danger.
Non-observance may cause personal injury or serious property damage.
Caution!
This symbol indicates a possible fault.
Non-observance could interrupt the device and any connected systems and plants, or result in
their complete failure.
Note!
This symbol brings important information to your attention.

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Manual LC10-*
General safety instructions
2 General safety instructions
Directives and Standards
Note!
Read the operating instructions before attempting commissioning.
Caution!
Installation, connection and adjustments should only be undertaken by specialist personnel.
Warning!
No safety component for protection of personnel or M RG NCY-STOP functions.
U-Directive Standards
2014/30/ U N 61000-6-2:2005
N 61000-6-4:20071A1 :2011
2014/35/ U N 60204-1 :20061A 1:2009

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Product Description
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3 Product Description
3.1 Overview
Together with the inductive loops laid beneath the surface, the LC series loop detectors form a
universal sensor system for detecting vehicles. People are not detected. Vehicles that enter the
inductive loop change the resonant frequency. This frequency change is measured and
analyzed by the microprocessor in the LC10 loop detector. The analysis is automatically and
periodically adjusted to the respective loop, ensuring that any changes in the loop inductance
caused by temperature, humidity or component age are automatically compensated for.
The loop detectors are control units that are fully functional without the need for any other
auxiliary equipment once the power supply and an inductive loop have been connected. The
inductive loop laid below the surface forms the inductor of a high-frequency oscillating circuit.
The metal parts of a vehicle that enters or is located in this wired loop cause the frequency of
the oscillation circuit to change. This frequency change is analyzed by the loop detector, and
the outputs, which are zero-potential relay contacts, can switch. The switching outputs are relay
contacts with a high switching power that can directly control contactors, valves and alternating
current motors. The dimensions of the detection area can be adjusted by changing the size and
shape of the inductive loops.
Figure 3.1 LC10-1 (left) and LC10-2 (right) loop detectors
3.2 Use and Application
Possible areas of application for the LC10-* series loop detectors are:
■ Selective vehicle detection
■ Opening impulse sensor for automatic gates and barrier systems
■ Presence checks for vehicles
■ Direction-specific vehicle checks
■ Controlling traffic light and vehicle detection systems
■ Ticket detection in parking garages
■ Managing tasks in automatic conveyor systems

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Manual LC10-*
Product Description
3.3 Indicators and Operating Controls
3.3.1 LC10-1-*
LED indicator
L D signals the allocation state of the loop (Loop allocated = L D On). A fault in the loop due to
a short-circuit or lead breakage and loop inductance outside the permissible range is indicated
by flashing of L D.
D P switches
It is possible to modify frequency, sensitivity and operating mode by using the DIP switch.
Sensitivity
The response sensitivity of the loop detector can be set in three stages by switches 3 and 4.
Frequency switches
The loop frequency can be set in four stages using the switches 1 and 2.
Operating mode switches
The following operating modes can be set with switches 5 and 6:
1L D indicator
2DIP switch
switch 3 switch 4 sensitivity
OFF ON low
ON OFF medium
ON ON high
Table 3.1 In the switch position "OFF", "OFF" the loop evaluation is switched off.
switch 1 switch 2 frequency
OFF OFF basic frequency f
ON OFF f - 10%
OFF ON f - 15%
ON ON f - 20%
Table 3.2 After actuation of the frequency switches 1 and 2 the loop must be readjusted with switches
3 and 4 set to "OFF", "OFF".
switch 7 switch 8 result
OFF - Pulse (0,8 s)when loop is allocated
ON - Pulse (0,8 s) when loop is abandoned
- ON Increased sensitivity (Boost)
Table 3.3 The increased sensitivity (Boost) is used for the detection of vehicles with high body
assemblies, e.g. HGVs.
21
ON OFF
BOOST MODE FREQ.
ON DIP
1 2 3 4 5 6

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Product Description
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3.3.2 LC10-2-*
LED indicators
Indications: L Ds 1 and 2 signal the allocation state of the loops (Loop 1 allocated = L D 1 on,
Loop 2 allocated = L D 2 on).
A fault in a loop due to a short-circuit or lead breakage and loop industance outside the
permissible range is indicated by flashing of the respective L D.
D P switches
It is possible to modify frequency, sensitivity and operating mode by using the DIP switch.
Sensitivity
The response sensitivity of the loop detector can be set in three stages using switches 3 and 4
(for loop 1) and switches 5 and 6 (for loop 2).
Frequency switches
The loop frequency can be set in four stages using the switches 1 and 2.
1L D indicator loop 2
2L D indicator loop 1
3DIP switch
switch 3 or 5 switch 4 or 6 sensitivity
OFF ON low
ON OFF medium
ON ON high
Table 3.4 In the switch position "OFF", "OFF" the loop evaluation is switched off.
switch 1 switch 2 frequency
OFF OFF basic frequency f
ON OFF f - 10%
OFF ON f - 15%
ON ON f - 20%
Table 3.5 After actuation of the frequency switches 1 and 2 the loop must be readjusted with switches
3 and 4 set to "OFF", "OFF".
2 31
CH2 CH1
ON OFF
BOOST MODE CH2 CH1 FREQ. CH1
ON DIP
1 2 3 4 5 6 7 8

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Manual LC10-*
Product Description
operating mode switches
The following operating modes can be set with switches 7 and 8:
3.4 Interfaces and connections
Connections LC10-1
switch 7 switch 8 result
OFF - Output of the loop allocation status
ON - Direction detection*
- ON Increased sensitivity (Boost)
Table 3.6 *A signal is output, depending on the allocation sequence of the loops. If loop 1 is allocated
before loop 2, only one switch signal is output for loop 1. The signal output for loop 2
remains inhibited until both loops are free again. If loop 2 is allocated before 1, only one
switch signal is output for loop 2. The signal output for loop 1 remains inhibited until both
loops are free again.
The increased sensitivity (Boost) is used for the detection of vehicles with high body
assemblies, e.g. HGVs.
Number xplanation Connector terminals
3 Loop connection 7/8
4 Signal output, maintained contact 5/6 = NO
6/10 = NC
5 signal output, 3/4 = NO
4/11 = NC
6 Operating voltage 1/2
78
6
4
1
10
5
11
3
2
4
5
6
3

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Product Description
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Connections LC10-2
3.5 Dimensions
Figure 3.2 Dimensions LC10-1 and LC10-2
Number xplanation Connector terminals
4 Loop connection, Loops 1/2 7/8 = loop 1
8/9 = loop 2
5 Signal output, Loop 1 5/6 = NO
6/10 = NC
6 Signal output, Loop 2 3/4 = NO
4/11 = NC
7 Operating voltage 1/2
7
8
6
4
1
10
5
11
3
2
5
6
7
4
9
SL 1 SL 2
SL 1
SL 2
75
37.5
27
71

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Manual LC10-*
Installation
4 Installation
4.1 Preparation
4.1.1 Laying loops
Laying loops in asphalt or concrete floors
When laying loops in asphalt or concrete floors the loop can be produced in commercial grade
insulated copper braid HO7V-K1.5(NYAF) with a cross section of 1.5 mm².
A groove approx. 8 mm wide and 30 - 40 mm deep is cut into the floor. The groove must be
cleared of all residue and the wires of the loop inserted as deep as possible and fixed in place.
The groove is then refilled with artificial resin or bitumen.
The connection lead for the loop is twisted (at least 20 times per meter) and then also laid in a
groove or a conduit to the loop detector. The connection lead should not exceed a length of
max. 150 m.
Laying loops under composite paving
When laying loops under composite paving the loop must be laid permanently in a plastic pipe
in a sand bed. We recommend to lay the loops in a plastic conduit. The loop must not be laid in
groove cut into the composite paving.
4.1.2 Number of loop windings
The induction loop consists of several copper wire windings which are inserted into the floor
groove. The number of windings depends on the size of the loop and can be calculated from
the loop circumference in accordance with the following table. Loop circumference U:
U=2a+2b
Figure 4.1 e.g.: a = 3 m; b = 1 m; U = 2 x 3 m + 2 x 1 m = 8 m; Number of windings = 4
8 mm
30 .... 40 mm
Composite pavement
Layer of sand
Completed loop
Loop circumference Number of windings
2 - 4 meters 6
4 - 7 meters 5
8 - 12 meters 4
13 - 25 meters 3
a
b

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Installation
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Adjacent loops of the same circumference should differ from each other by 1 winding. This
prevents the loops from operating on the same frequency.
4.1.3 Loop test
After laying and sealing the insulating resistance of the loop must be measured against earth. It
must be at least 1 MOhm.
mportant notice!
1. When laying in asphalt/concrete the loop must be buried deep enough not to be pressed
back out under driving load.
2. Twist the loop connection lead well (at least 20 times per meter) and lay permanently.
3. Firmly embed the loop and the connection lead. Loop movements can result in false
alarms.
4. Solder the connection points in the loop connection lead and insulate them well (e.g. dis-
tribution box + sealing)
5. Lay loop connection lead separately from high voltage cables.
6. Lead the connection lead also twisted in the switch cabinet up to the terminals of the loop
detector.
7. Do not lead loops over resistance mats of floor heating installations.
4.2 Installation
nstallation LC10-*
The loop detectors are constructed within the 11-pole plug-in socket housing and can be
installed directly in switch cabinets. They can be fixed either on a 35 mm top hat rail or via
screw connections. Direct installation at the induction loop on location is also possible through
integration in an ISO housing. This method of installation is recommended for long loop
connection leads.
During switch cabinet installation care must be taken not to install the loop detectors directly
next to switch contactors for high voltage consumers in order to prevent interference.
Connection LC10-*
Loop detectors are control devices which are fully ready for operation without the need for
additional equipment when connected to the supply voltage and the induction loop. The
switching outputs are relay contacts with high breaking capacity which can directly trigger
contactors, valves and alternate current motors.
To reduce potential interference it is recommended to fit inductive consumers with R/C
protective circuits (47 Ohm / 0.1 µF).
The loop connection lead must be well twisted (at least 20 times per meter) all the way to the
connection terminals of the loop detector. The loop connection lead must be laid separately
from switching cables of high voltage consumers (not in the same cable conduit).
The proper design and correct laying of the loop are preconditions for the proper functioning of
the loop detector.

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Manual LC10-*
Commissioning
5 Commissioning
When the operating voltage is applied to the device automatic adjustment with the loop takes
place. The output relays are switched in the switch position "loop not allocated". The
adjustment takes 2 s, then the device is ready for operation. Automatic adjustment also takes
place when both sensitivity switches 3 and 4 (Loop 1) and 5 and 6 (Loop 2) are set to "OFF"
and then set to another switch position. The adjustment can be carried out separately for loop 1
and loop 2.
5.1 Test function
The loop detector is provided with an integrated test function, which enables the loop
frequency and sensitivity to be optimally set without additional devices or instrumentation.
Display of the recommended sensitivity
The vehicle must be driven onto the loop. The loop detector measures and stores the
frequency change. When switches 3 and 4 are changed over the recommended sensitivity is
indicated by flashing of L D 1 (Loop 1).
n addition to LC10-2: When switches 5 and 6 are changed over the recommended sensitivity
is indicated by flashing of L D 2 (Loop 2).
Measurement of the loop frequency
The loop frequency can be measured via the L D. Set switches 3 and 4 from "OFF" to "ON".
The L D indicates the loop frequency via a signal sequence:
5.2 Loop geometry
The size and shape of the loop are determined by the respective application. Generally, the
maximum sensitivity of the induction loop is achieved if the loop is no larger than the vehicle to
be detected. This principle must in particular be observed if the sensitivity is reduced by steel
reinforcements within the floor.
Detection of passenger cars and forklifts
Adjust sensitivity step 3
LED
1 2 3
loop frequency
33 kHz
LED
3 x 10 kHz 3 x 1 kHz
1 2 3
roadway
driving direction
~ 0,5 m
1,5m

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Commissioning
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Detection of trucks
Detection of two-wheeled vehicles (motorcycle, bicycle)
Loops with reduced side sensitivity
5.3 Loop interference
nterference from adjacent loops
Loops connected to different loop detectors must have a minimum distance of 2 meters from
each other and operate on different frequencies.
For loops connected to a double detector this minimum distance can be reduced. However, it
must be ensured that the two loops do not operate on the same frequency.
roadway
driving direction
2 m
~ 1 m
roadway
driving direction
0,9 m
0,2 m
45˚
Sliding doors
Selection gates
Folding doors
≤1 m

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Manual LC10-*
Commissioning
nterference from metal
Fixed metal constructions e.g. steel girders, drains, steel reinforcements are integrated in the
automatic compensation of the loop detector and do not affect the safe functioning except for a
reduced sensitivity.
Moveable metal constructions e.g. rolling doors and revolving doors must have a sufficiently
large distance to the loop (> 1 meter) to prevent triggering the loop detector when moving.
5.4 Influencing variables
Loop inductivity
The recommended number of windings is only dimensioned for a loop inductivity of approx.
200 µH. At this loop inductivity no significant reduction of sensitivity results from a connection
lead of up to 50 meters. For longer connection leads (up to max. 150 m) the loop inductivity
should be increased by increasing the number of windings.
Loop resistance
The total resistance of loop connection leads and contact resistances should not exceed 5 .
The cross section of the loop connection lead should be 1.5 mm².
Steel reinforcements
Steel reinforcements in the floor reduce the loop sensitivity. With heavy reinforcements the loop
size should be adjusted optimally to the vehicle size (no large loops) in order to keep the loss of
sensitivity low.
Laying loops
The loops must be permanently laid in the floor to prevent malfunctioning due to mechanical
movement. specially when laying between rail tracks a firm installation and the use of a stable
complete loop should be ensured.
Connecting loops in series
Connecting loops in series (e.g. opening loops on the inside and outside of gates) considerably
reduces the sensitivity (approx. 30 - 50 %). In such cases we recommend the use of the two-
channel loop detector LC10-2.
nsulation resistance
Insufficient insulation resistance of the loop to earth, to adjacent loops or of the windings to
each other can cause malfunctioning. When laying loops it must be ensured that the line
insulation is not damaged by sharp edges in the floor groove.
SD IND 2.1 SD IND 1.1
SD IND 1.1 SD IND 1.1
> 2 m
> 2 m

Manual LC10-*
Troubleshooting
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1 Troubleshooting
Before requesting a service call, please check that the following actions have been taken:
■ quipment has been tested according to the following checklists.
■ Telephone assistance has been obtained from the Service Center in order to isolate the
problem.
nterference
■ The settings of the DIP switches (ON/OFF) were reviewed according to the instruction
manual.
■ The relay is connected straight and tightly to the plug-in socket.
■ All 11 connecting cables were screwed properly and stable to the corresponding plug-in
socket.
■ All 11 connection terminals are clean and free from any dirt.
■ The inductive loop(s) were installed properly. (see laying instructions for inductive loops)
Fault Analysis
Source of Fault Cause Action
By using a two-channel loop
detector both channels are
responding identically.
Both detectors are working on
the same frequency.
Different inductive loops (in
length and number of loops)
must be installed and
connected.
The loop detector doesn't
react or has contact issues.
The connections are dirty. Please clean the connection
terminals with a suitable
contact cleaner. (e.g. Contact
Chemistry 60)
The loop detector doesn't
react to high vehicles.
Insufficient sensitivity. The switching threshold must
be increased via the DIP
switch (sensitivity boost).
The loop detector is triggered
without any passing vehicle.
The distance between
inductive loop(s) and
moveable metallic parts (e.g.
gates) is too small.
The distance between the
edge of the inductive loop(s)
and moveable metallic parts
must be at least 1 metre.

Subject to modifications
Copyright PEPPERL+FUCHS • Printed in Germany
www.pepperl-fuchs.com
FACTORY AUTOMATION –
SENSING YOUR NEEDS
Worldwide Headquarters
Pepperl+Fuchs Group
68307 Mannheim · Germany
Tel. [phone]
E-mail: [email protected]
USA Headquarters
Pepperl+Fuchs Inc.
Twinsburg, Ohio 44087 · USA
Tel. [phone]
E-mail: [email protected]
Asia Pacific Headquarters
Pepperl+Fuchs Pte Ltd.
Company Registration No. 199003130E
Singapore 139942
Tel. [phone]
E-mail: [email protected]
/ DOCT0973C
11/2016