Laser Opto Interupter Beam Type 12mm
|Item Number: 34836 HD|
2 part Beam type opto interupter with NPN Open Collector transistor for detecting objects breaking the beam. Output low upon detection.
Visible Red 880nM Beam for easy alignment
Power: 6-36VDC @ ~ 300mA (Load Dependent)
Output: Current Sink 300mA max
Temp. Range: -25 to +60 "C"
Operational LEDs on Back.
Body Thread: M12x1
Includes Mounting Brackets
DIA: 12mm (Body) L: 70mm WT: .3
||Laser Opto Interupter Beam for Driveway
|I purchased the Laser Opto Interupter Beam units and just finished testing them. The pair works quite well over my tested range of 5-18V. I went a volt below the specified lower limit of 6V just to see what margin I have. The output does indeed look like an open NPN collector and in my case was able to swing from less than 40 mV to almost the top rail using a load of either 220K or a 20 mA LED. The 220K resistor was for a low-power application where the load is a flip-flop. With 8 V on each, the current draw is less than 3mA for the laser and for the detector. The units look well built externally. One warning: the wire color codes are in error in the download at least for my unit. Both laser and detector had colors shown in a diagram on the units themselves, so those are what you should go by. On mine, the negative rail for each unit is the blue wire BU and the positive rail is the brown BN wire. The open-collector is the black BK wire.|
|- John Coleman, FL|