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SRX3 

Ultrasonic Fork Clear Label 

Static or Dynamic teach with Remote in 

 

INSTRUCTION MANUAL 

 

The forked ultrasonic sensor for label detection works by the difference of 
material width inside the sensible area. 
The sensor is able to detect paper, plastic (transparent type too) and metallic 
label on paper, plastic and metallic support tapes.

 

 

CONTROLS 

STATUS LED (YELLOW) 

The yellow LED ON indicates output activation. 

MODE LED (GREEN) 

In working mode, the green LED MODE is on. 
The MODE LED shows the phases of the calibration and NO/NC toggling 
procedures (see the following chart). 
The MODE LED is quickly blinks in three conditions: 
1- if the sensor is not able to do a calibration, 
2- if the SET push-button or the REMOTE input are activated more than 60 
sec, 
3- if the sensor detects a short-circuit condition on the outputs. 
 
To skip from the conditions 1 and 2, it is necessary to press SET or activate 
REMOTE briefly, then the sensor restores the last valid calibration. 
In case of condition 3, it is necessary to remove the short-circuit cause. 

 

 

To start the LABEL calibration procedure press SET or activate REMOTE and 
deactivate them when the MODE LED is on for the first time (1s < Tp< 4s). 
To start the OFFSET regulation procedure press SET or activate REMOTE 
and deactivate them when the MODE LED is off for the second time  
(4s < Tp < 7s). 
To toggle the NO/NC output function press SET or activate REMOTE and 
deactivate them when the green LED is on for the second time 
(7s < Tp< 15s). 
To skip any operations, release SET or deactivate REMOTE when the green 
LED is off, after 15s. 

 

SET PUSH-BUTTON 

Press SET push-button to activate acquisition. 

 

 

 

CONNECTIONS 

M12 CONNECTOR 

(SRX3-5-US-M12-PNH / SRX3-5-US-3-M12-PNH)

 

 

 

When the REMOTE wire is connected to 0V, it is as if the SET push-button was pressed. 

 

M8 CONNECTOR 

(SRX3-6-US-M8-PH / SRX3-6-US-3-M8-PH) 

 
 

 

(SRX3-6-US-M8-PN / SRX3-6-US-3-M8-PN) 

 
 

 

 

TECHNICAL DATA 

 

Power supply: 

12 … 30 VDC 

reverse polarity protection 

Ripple: 

10 % 

Consumption: 

< 80 mA 

Output type: 

PNP + NPN 

Output current: 

250 mA max. 

(short-circuit protection) 

Voltage: 

<1.5 V @ 100 mA

 

 

Minimum pulse time: 

1 ms 

Detectable sizes:

 

> 2 mm

 

Max. Tape speed 

(see note 1)

: 60 

m/min

 

Tape size 

(see note 2):

 

> 16 mm

 

Rising time:

 

0.8 us max

 

Falling time: 

1.6 us max

 

Switching frequency

500 Hz 

Power on delay: 

325 ms

 

Ultrasonic frequency: 

300 kHz

 

Slot width:

 3 

mm 

Setting:

 

SET push-button / REMOTE input 

Indicators:

 

STATUS LED (yellow) /  

MODE LED (green) 

Operating temperature: 

0 to 50 °C

 

Storage temperature: 

-25 to 75 °C

 

Humidity: 

35 … 85% rH non condensing 

Dielectric strength: 

500 VAC, 1 min between electronic parts and 

housing 

Insulating resistance: 

>20 M

, 500 VDC between electronic parts and 

housing 

Ambient light rejection: 

according to EN 60947-5-2 

Vibrations: 

0.5 mm amplitude, 10 … 55 Hz frequency, 

for every axis (EN60068-2-6) 

Shock resistance: 

11 ms (30 G) 6 shocks per every axis 

(EN60068-2-27) 

Housing material: 

Aluminium 

Mechanical protection: 

IP54 

Connections: 

M12 or M8 connector 

Dimensions:

 

90 x 55 x 22 mm

 

Weight:

 

300 g

 

 

NOTE 1:  

The maximum sliding speed is 
proportional to the size of the 
short target to detect. 

 
Example

Speed = label gap / min. detection 
time = 2 mm / (2 x 1 ms) = 1 m/s = 60 
m/min  
 

NOTE 2:  

The width and the placement of the tape in the fork, must to cover always all the dashed 
area drawn around the sensing point. 

 

 

 

 
 

DYNAMIC CALIBRATION

 

(SRX3-5-US) 

The setting procedure is shown in the following table. 
The calibration parameters are saved for restoring at next power-on.

 

 

STEP 

USER ACTION 

MODE LED

SENSOR ACTION 

1 Place 

the 

label 

in the fork 

ON 

In working mode 

Press SET or activate REMOTE > 1s, 

release SET or deactivate REMOTE < 

4s. 

OFF - 

ON 

Measure the SET or 

REMOTE activation 

times 

Wait blinking on the LED. 

ON - 
Midd 
Blink 

Do the calibration on 

the label 

Run the tape for some labels. 

Midd 
Blink 

Search the best 

working condition 

To end and store 

the calibration, press 

SET or activate REMOTE briefly 

Midd 
Blink 

Measure the SET or 

REMOTE activation 

times. 

Store the new values 

To end but NOT store 

the calibration, 

press SET or activate REMOTE up to 

the LED switch off 

Midd 

Blink - 

OFF 

Measure the SET or 

REMOTE activation 

times. 

Restore the previous 

values. 

Release the button 

ON 

Return to working 

mode 

 

STATIC CALIBRATION (SRX3-5-US-3) 

 
The setting procedure is shown in the following table. 
The calibration parameters are stored, so they are pick up at next power-on. 

 

STEP

USER ACTION 

MODE 

LED 

SENSOR ACTION 

Place the label in the fork. 

ON 

In working mode 

Press SET or activate REMOTE > 1s,  

release SET or deactivate REMOTE < 4s 

OFF - 

ON 

Measures the press 

and release times 

Wait blinking on the LED 

ON – 

Midd 
Blink 

Do the calibration 

on the label 

To end and store

 the calibration, wait the 

end of the blinking on the LED 

Midd 
Blink 
- ON 

Wait 3 s, it stores the 

new values and 

return in working 

mode 

To end but NOT store

 the calibration, 

press SET or activate REMOTE briefly 

within 3s 

OFF - 

ON 

When the button is 

released, restore the 

previous values 

 
 

OFFSET REGULATION (SRX3-5-US-3) 

 

At the SET release or REMOTE deactivation, during the second switch off 
LED MODE phase, the device enters in the manual OFFSET regulation 
mode, shown by a slow blink on the MODE LED. 
The OFFSET regulation is the adjustment of the threshold value used to 
discriminate the signal. 
In the OFFSET regulation mode the outputs and the status LED work like in 
the working mode. 
After 10 s of no operations on SET or REMOTE, the OFFSET manual 
regulation mode is stopped. 
The variations are saved, for restoring at the next power-on.

 

 

 

 

The OFFSET manual regulation mode is executed by pressing SET or 
activating REMOTE. The sensor will do the first five variations at the speed of 
1/sec, the second five variations at the speed of 2/sec and the next variations 
at the speed of 5/sec, up to the SET or REMOTE deactivation or up to the 
reaching of minimum or maximum OFFSET value. 
Each OFFSET variation is shown by a blink on the green LED. 

 

 

 

To choose the variation mode between increment or decrement of the 
OFFSET value, press SET or activate REMOTE twice rapidly (double click), 
in this way the sensor toggles between the two modes at each double click.  
At the end of the double click the chosen mode is shown by 2 s of LED OFF 
in increment mode and 2 s of LED ON in decrement mode. 
 
At each OFFSET manual regulation startup the sensor activates the 
increment mode, while the chosen mode remains activated up to the exit of 
the OFFSET manual regulation procedure. 
With increment mode and SET or REMOTE activation, the MODE LED is 
OFF and the pulse variations are ON. 
With decrement mode and SET or REMOTE activation, the MODE LED is ON 
and the pulse variations are OFF. 
 

 

 

At the end of the label calibration, the sensor has an operative threshold.  
It is suggested to do: 
-  an OFFSET increment to increase the label position variations tolerance in 
  the sensing area, 
-  an OFFSET decrement to improve the gap detection with little sizes and 
  high speed tape movement. 
 

 

 

NO – NC WORKING MODE 

 
At the SET or REMOTE deactivation, after the second time MODE LED light 
on phase, the device toggles the NO/NC function of the output and the 
STATUS LED. 
The NO/NC output function is saved, for the restoring at the next power on. 
NO mode: outputs and STATUS LED are activated on the label. 
NC mode: outputs and STATUS LED are activated with the label gap.

 

   

 

 

WORKING MODE NOTE 

For the correct label detections, the tape must be taut and on the carriage, in 
calibration and working mode. 
 
Press SET or activate REMOTE at the power on for more than 3 s to restore 
the default working condition (calibration for transparent tape and label and 
NO output mode), release SET or deactivate REMOTE during the double 
blink phase on the MODE LED. 

 

DIMENSIONS

 

 

 

Dimensions in mm 
 

Fixing Slot Ø 4.5 mm 

Working point reference 

Allen screw Ø 3 for labels carriage 

 
 

AVAILABLE MODELS 

 

Model Description 

Order 

No. 

SRX3-5-US-M12-PNH 

Ultrasonic Fork Clear Label - Dynamic 

teach with remote in PNP+NPN NO 

M12 connector 

953171000 

SRX3-6-US-M8-PH 

Ultrasonic Fork Clear Label - Dynamic 

teach with remote in PNP 

M8 connector 

953171020 

SRX3-6-US-M8-PN 

Ultrasonic Fork Clear Label - Dynamic 

teach PNP+NPN NO 

M8 connector 

953171040 

SRX3-5-US-3-M12-PNH 

Ultrasonic Fork Clear Label - Static 

teach with remote in PNP+NPN NO 

M12 connector 

953171010 

SRX3-6-US-3-M8-PH 

Ultrasonic Fork Clear Label - Static 

teach with remote in PNP 

M8 connector 

953171030 

SRX3-6-US-3-M8-PN 

Ultrasonic Fork Clear Label - Static 

teach PNP+NPN NO 

M8 connector 

953171050 

 
 

The sensors are NOT safety devices, and so MUST NOT be used in the safety control of 

the machines where installed. 

 

Datalogic S.r.l. 

Via S. Vitalino 13 - 40012 Calderara di Reno - Italy 
Tel: +39 051 3147011 - Fax: +39 051 3147205 - www.datalogic.com

 

 
Helpful links at www.datalogic.com: 

Contact Us,

 

Terms and Conditions,

 

Support

 
The warranty period for this product is 36 months. See General Terms and Conditions of 
Sales for further details. 
 

 

Under current Italian and European laws, Datalogic is not obliged to take care of 
product disposal at the end of its life. Datalogic recommends disposing of the 
product in compliance with local laws or contacting authorised waste collection 
centres. 

 

© 2015 - 2017 Datalogic S.p.A. and/or its affiliates 

 ALL RIGHTS RESERVED. 

 Without limiting the 

rights under copyright, no part of this documentation may be reproduced, stored in or introduced into a 
retrieval system, or transmitted in any form or by any means, or for any purpose, without the express 
written permission of Datalogic S.p.A. and/or its affiliates. Datalogic and the Datalogic logo are registered 
trademarks of Datalogic S.p.A. in many countries, including the U.S.A. and the E.U. All other trademarks 
and brands are property of their respective owners. Datalogic reserves the right to make modifications 
and improvements without prior notification. 

 
 

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