AutomationDirect now offers Datalogic print mark contrast sensors with 6-12mm sensing distances. Designed to detect the difference in the wavelength of the reflected light between a target mark and background, the contrast sensors use RGB light emission with automatic selection, and feature teach-in sensitivity adjustment, and selectable light on/dark on outputs.
The S8 Series compact contrast sensors feature horizontal spot orientation, a 25 kHz switching frequency, NPN or PNP logic output, 12-30 VDC operating voltage, and are available with IP67-rated plastic or IP69K-rated 316L stainless steel housings. The S8-series sensors, are fitted with a 4-pin M8 quick-disconnect or have an attached 150mm cable with M12 quick-disconnect.
New TL Series contrast sensors feature vertical or horizontal spot orientation, 10-30 VDC operating voltages, aluminum housings, and NPN/PNP or PNP logic outputs. TL-series sensors are fitted with a 5-pin M12 quick-disconnect with adjustable exit angle models are available with 0-5VDC analog outputs and 15, 20, or 50 kHz switching frequencies. The TL series are IP67-rated contrast sensors.
In this HOW TO video, we will cover the basics of wiring and setting up one of AutomationDirects contrast sensors from the brand Datalogic. I am currently using model number: Tl46-WL These Datalogic contrast sensors we sell at AutomationDirect all require a connecting cable. Make sure you select the correct cable with correct number of pins in either a straight or a ninety degree connector. The sensor I am using requires a 5 pin 12mm connector cable, I am using the part number listed on the screen: (7000-12361-2150300) The documentation for the sensors state that the center wire will be Grey color, however our sensor cables with 5 pins have a yellow and green wire for the center pin. If you have questions, use a multi meter and check the pin out or call our free technical support here at AutomationDirect. I follow the wiring diagram for this sensor it can be found in the documentation that comes with the sensor, or you can find it on our website. I connect brown to 24 volts positive, blue to 0 volts or negative and the black wire to the input of my PLC X2. I have this setup wired NPN or Positive voltage to the common of the PLC. When the sensor detects a target, it sends a negative signal to the PLC and triggers the input X2. We can change the output of the sensor by following the instructions. First we must unlock the keypad by pressing and holding the set button for 5 seconds. The Unlock LED will turn on allowing us to make changes. Now we can press the positive and negative buttons simultaneously for ten seconds. At two seconds, the Delay LED turns on, and we continue to hold until 10 seconds, the delay LED turns off, we release the positive and negative buttons and we see the Ready and Lock LED's cycle. Now our sensor can be wired with a negative voltage to common. To change back to the original setting, we do the same press both positive and negative buttons simultaneously for ten seconds until the delay LED turns off, we release and the Ready and Lock LED's cycle. Now that the sensor is wired and setup for NPN, let's setup our target. I have a print sheet with tick marks for an example. In this example we setup the sensor to read the black tick marks as the target and the white sheet as the background. In other how to videos I show how the target and background can be reversed. To set the target, I adjust the sensor over the tick mark and press the set button either on the sensor or if I have the remote wire connected, I trigger it with a push button or some other input. When the sensor captures the target, all LED's will be off. Now I move the target so the background can be set, I press the button again and the green LED will blink and when ready the green LED stays illuminated. As you can see, I can now detect the tick marks on this sheet. Simple enough to setup, right? A delay can be set in the sensor to allow the detecting device in our case the PLC input to see the detection pulse in the event the pulses are too short to detect. The sensor will allow the pulse to be extended to 20ms. Now let's setup our delay setting as covered in the instruction manual. I press the positive and negative buttons simultaneously for two seconds until the delay LED turns on as shown. When we sense the same tick marks, we notice that the signal is much slower. To deactivate the delay, we do the same, press both positive and negative buttons simultaneously for two seconds until the delay LED turns off as shown. I hope this how to video was useful. Please follow us to other how to videos on these Datalogic contrast sensors. Thanks and have a great day.
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