How to wire and check a sensor

s.e.design

Try this to test your SY-310/410 with a 5V supply (view in fixed font or M$ Notepad):

VCC + | VCC VCC .-. + + | |R1 | | | | | .-. '-' | | |R2 | .------------------. | | | '--o A V o--' '-' | SY-310/410 | | | Out o------o------------o | | .--o K G o--. | '------------------' | | | === === GND GND created by Andy´s ASCII-Circuit v1.24.140803 Beta

Value of R1 chosen to have 20mA through the diode. For Vcc=5V, try R1 = 180 ohms. R2 is an open collector pullup. Try 1K for a 5V supply.

I think the data sheet could have provided a typical circuit. Omron usually has better applications notes on their data sheets. Possibly it's because they really want you to buy the higher-priced spread.

Try google newsgroups to post to s.e.b.

Good luck Chris

On 19 Apr 2005 11:36:32 -0700, "Lathe_Biosas" wroth:

The A and K terminals are the anode and cathode terminals of an LED (diode). The voltage given in the datasheet is the voltage you might measure if you apply a 20 mA current through the diode from anode to cathode.

The voltage is NOT a supply voltage that you should connect to the diode.

What connections did you make to the A and K terminals?

Jim

Are you aware that the sy310 is a reflective dark=ON type?

Assume a DC supply voltage of 12V. Connect +12V to the V pin and -VE to the G pin. Connect +12V via a 560 ohm (anything up to say 820 ohms should be ok) to the A pin and from the K pin to -VE of the supply.

Connect +12V via a 560 ohm resistor to the anode of a standard red (or other color) led and connect the cathode of the led to the O pin.

The detector of the sy310 is now permanently on and the test led should also be on, ie. no light reflected = output on.

Bring a sheet of white paper within 5mm parallel to the top of the sy310. The test led should now switch off, ie. light reflected = output off.

Move the paper away and the led should switch on again.

If the device doesn't operate like this you have definitely blown it up or your connections are wrong.