Pepperl+Fuchs Blog

Ask an Expert Industrial Sensors - Episode 9

Posted by John Appleson on Wed, May 13, 2015

This episode of Ask an Expert for industrial sensors examines and provides answers to interesting sensing questions we've received from customers just like you. We explore and answer these questions:

  1. Is extended addressing necessary when creating two separate ASI interface circuits on one AS-Interface gateway?
  2. What do the wire colors mean, and what is their function, on the ML8 series photoelectric sensor?
  3. How do you troubleshoot the beam width and sensing range of a UB4000-30GM series ultrasonic sensor?
  4. What kind of sensor is best to measure the density and color differentiation of a marking within a medium?

ask-an-expert-industrial-sensors-resized-600Feel free to ask us your sensing questions, and we'll do our best to reply with the whys and hows of a particular solution.



John: Welcome to Ask an Expert! Hi, this is John Appleson, Marketing Manager with Pepperl+Fuchs. Today, I'm joined by Casey Sutton. Casey works as an Application Engineer here at Pepperl+Fuchs. So welcome, Casey, and thanks for being here!

Casey: Hi John, thanks for asking me.

John: Ok Casey, let's get started. The first question asks about creating two separate AS-Interface circuits on one gateway (VBG-ENX-K20-D). This customer would like to know if this would require extended addressing. He also states that some of his devices cannot support extended addresses for any nodes with A or B, but still wishes to create two circuits, each one with nodes 1-31. Casey, will our customer encounter addressing issues?

Casey: No. Putting two AS-Interface networks on one gateway does not require extended addressing. He can have both networks on his gateway, with any combination of half and full addresses. The only stipulation here is that he cannot have a half and a full address on the same number.

John: Alright Casey, regarding the ML8 series retroreflective photoelectric sensor, this customer would like to know what wire colors correspond with connections 1 through 4, and what they do. Can you also explain what the notations 'OV' and 'Q' on the data sheet for this sensor (ML8-55/25/103/143) mean?

Casey: With this sensor, pin 1 is brown, for your plus supply voltage. Pin 2 is white, which isn't used on this sensor. Pin 3 is black, for your output wire, and pin 4 is blue, for your common DC connection. The 'OV', or zero volt notation, is for your DC common connection, while the 'Q' notation is for your output connection.

John: Alright, we have a customer using our UB4000-30GM series ultrasonic sensor, and he's finding that the beam pattern is too wide, which is causing false detection. He's using the ultrasonic sensor in a bin for tank content detection. What are your thoughts on this?

Casey: In this application, there is a ledge in the sensor's field of view. Now, he needed the entire four meters, so he couldn't reduce the range to narrow the beam. So what we did was move the sensor to a more central location so that the ledge was not in the field of view.

John: OK, last question - this customer is looking to measure the density and color differentiation of a marking within a medium. What can you recommend here?

Casey: What I recommend for this particular application is the VCS110 color sensor. This photoelectric sensor has discrete outputs and can store up to ten different colors and tolerances.

John: Well that concludes this segment of Ask an Expert. I'd like to thank Casey for joining me today, and thank our audience as well.

Questions about Industrial Sensors?  Get the Quick Select Product Guide

Topics: Ultrasonic Sensors, AS-Interface, Photoelectric Sensors, Ask an Expert

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