Stid L51 Bedienungs- und Wartungshandbuch

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Installation procedure

Hands free reader: L51 - R13 Variant / RS485 type 7S

OVERVIEW

Characteristics:

Power supply: ................ 12 VDC (12 min – 15 max)

Consumption: .................250 to 700mA depending on calibration

Communication: ............. RS485 addressable

Pin out: ........................... 4 points (located on the RS485 converter)

+ 2 points for LED color commands

Reading distance:

Credit card tags (CCT type): max. 50 cm (*)

High distance tags (TVL type): max. 80 cm (*)

(*) Performance for a non perturbed environment.

Mechanic:

Antenna: Dimensions : 408 x 288 mm – Thickness 13 mm

Electronic case: IP67 waterproof aluminum case. 171 x 121

x 55 mm. Integrated behind the antenna.

Features

•Manual calibration to get the best possible performances according to the reader environment.

•Possible to add an extra LED and buzzer to give detection / reading information.

¾ face

Side view

Rear view



Installation procedure

Hands free reader: L51 - R13 Variant / RS485 type 7S

Recommendations / Limits

•If 2 (or more) readers are installed too close, it can cause a coupling. The readers will not be able to

read tags or a tag will be read by each reader at the same time.

•Do not install the reader near to a closed conductor circuit.

•Do not install the reader on a metallic support

•Do not install the reader close to a metallic ground. In this case, respect the minimum distance,

between the antenna and the ground, which are 20 cm with the side of the antenna and 50 cm with

the back of the antenna.

•Do not forget to connect the 0V to a clean ground.

(See the installation examples at the end of this document)

Unfavorable cases

Avoid installing the reader close to perturbing electromagnetic field like:

•Informatics data transmission cables

•Energy transmission cables

•Screen display

•Equipment with no EMC conformity

Wiring / Calibration

Wiring

Connect the power supply (0V, +12V) and the bus data lines (L+ / L-) to the interface.

The maximum distance between the host and the reader is 1000m.

Recommended cables:

1 pair 6/10°of 98,43 ft max (30 m) OR 1 pair 9/10°of 165.05 ft max (50 m)

2 pairs 6/10°of 196.86 ft max (60 m) 2 pairs 9/10°of 328.10 ft max (100 m)

3 pairs 6/10°of 328.10 ft max (100 m)

Electronic equipment view

Fig 1

Connect your

power supply and

data lines here



Installation procedure

Hands free reader: L51 - R13 Variant / RS485 type 7S

Main board view

Fig 2

First use

•Fit the reader at the desired place

•First connect only the power supply

•Present a tag to the reader

•Check the good detection (if the distance is not correct, modify the calibration)

To control the detection, use the LED on the main board. You can verify that data are sent from the

main board to the interface with the LED on the interface.

•Connect the data lines (L+ / L-)

Calibration

The reader is calibrated before delivering, but it is possible that the reader need to be re-calibrated to adjust

to its environment.

•Connect a voltmeter (DC) to check the consumption (see the main board view for the voltmeter

connection). Consumption = measure x 10

•Usually, you get the best possible performances when the reader’s consumption is maximum

(usually maximum is around 500 mA (measure 50mV)).

•To correctly calibrate the reader you need to find the right capacitance value (jumper J1, J2, J3, J4

and adjustable capacitor). For more details, check the scheme and the algorithm above.

•The ground jumper can be used to reduce perturbations.

To interface

Adjustable capacitor

(fine calibration)

OFF

Internal LED activation

Ground jumper

Consumption measure

Connect here your multimeter

Calibration jumpers



Installation procedure

Hands free reader: L51 - R13 Variant / RS485 type 7S

J1 0

J2 0

J3 0

J4 0

Decimal value 0

Calibration algorithm

The goal of this algorithm is to find the best jumper setting by a dichotomy method.

oIf the consumption increase when capacitance value is increased, the maximum

consumption value has been already reached. So you have to decrease the total

capacitance value by modifying the jumper setting.

oIf the consumption decrease when capacitance value is increased, the maximum

consumption value has not been already reached. So you have to increase the total

capacitance value by modifying the jumper setting

Capacitance value

consumption

J1: MSB

J4: LSB

Best calibration

Binary counting

Use the adjustable

capacitor to make a fine

calibration



Installation procedure

Hands free reader: L51 - R13 Variant / RS485 type 7S

During the algorithm process, if you go back to the last jumper setting, it is because you are near the best

calibration setting. Try, with the adjustable capacitor, to find the maximum consumption (try it with the 2

different jumper setting).

Interface

Option available: Interface with relay

Turn clcokwise the adjustable capacitor

(You add capacitor)

Does Reader

consumption

increases

Replace the adjustable capacitor to its middle position

Increase the jumper setting.

You add capacitance. Decrease the jumper setting.

You remove capacitance.

YES

Maximum has not been reached

Maximum has been reached

SETUP jumper

Bus activity

Mechanical ground

+Alim

GND

RS485 bus

LED-R

LED-V

SCAN

CLOCK

DATA

CODE

+Alim

GND

To the

reader

End of lines resistors

(120 ohms)



Installation procedure

Hands free reader: L51 - R13 Variant / RS485 type 7S

Reader configuration (SETUP mode)

To configure the reader (address, communication characteristics), you need to go into SETUP mode.

-Switch off the reader

-Fit the SETUP jumper

-Switch on the reader (the reader will automatically send a message on the bus)

You are now into SETUP mode, you can configure the reader to your needs. When you have finish to

configure the reader :

-Switch off the reader

-Remove the SETUP jumper

-Switch on the reader

To get more information about how the RS485 7S reader is operating, please check the 7S protocol

specification

Optimization

If you do not have the best performances, some simple tips could help you to get them.

•Analyze the environment to find possible causes of perturbation

•Verify the wiring. Check that all contacts are corrects.

•Verify that the 0V is connected to a clean ground

•Measure the power supply. In some cases, the power supply doesn’t succeed to drive enough

current and its voltage drop. If you have less than 12V, the performance can be reduced a lot

•Measure the consumption. If you don’t have around 500 mA, you need to calibrate the reader to its

environment (see the calibration section).

•Try to move the reader and/or change its orientation.

TIPS: You can use a 12V battery to power the reader and it will be easier to move it.

CAUTION: All detection tests need to be done with the embedded ‘CP’ LED.

If you move the reader and get better performance on a new place, it means the initial place was not

compliant for long range 125 kHz readers.



Installation procedure

Hands free reader: L51 - R13 Variant / RS485 type 7S

Mechanical

(Dimension in mm)

Mounting: 3 fixing points on the back of the electronic case (diam 4.2 mm screw type: TF M4).

408,00mm

288,00mm

Boîtier

électronique

(transparence)

Fixation de la

contre-plaque (x4)

Points de

fixation

murale

Led

Electronic case detail

170

120

151

Ø 3.3 mm

35 25

Protection plate fixation

Electronic case

(ghost view)

Wall fixations



Installation procedure

Hands free reader: L51 - R13 Variant / RS485 type 7S

Assembling

288.00

408.00

40.00 144.00

33.00

62.00

90.00

LED

288.00

408.00

40.00 144.00

33.00

62.00

90.00

LED

Protection plate

Top of the electronic case

Wall fixation

Wall

Plaque avant de propreté

Antenne

Mur / Support

Coffret

Electronique

Capot

de coffret

électronique

Fixation

murale -

3 points

Fixation de la plaque

avant avec cache vis

Fixation de la plaque

avant avec cache vis

Led

Protection plate fixation

Protection plate

Top of the

electronic case

Wall /

mounting support

Antenna

Wall fiwation



Installation procedure

Hands free reader: L51 - R13 Variant / RS485 type 7S

Tag using

Present the tag in front of the reader, perpendicularly, and approach it slowly until the tag is detected.

It is not necessary to agitate the tag.

Caution: If the tag is inclined, the reading distance will be reduced.

30°

60%

25°

80%

0°

100%

% distance :

30°

60%

25°

80%

0°

100%

% distance :

Readers installation examples

NO YES

Ground loop

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