Photoelectric sensor connect to Motor Driver Controller 7350 / MID-7604)

[Hassan]

I am evaluating Motor Controller (7350) and Driver (MID-7604)

Where or how I can connect photosensors on these boards to say for example thru sensor "wafer present" or absent

I am thinking using sensor such as Honeywell HOA2001-001

http://catalog.sensing.honeywell.com/printfriendly.asp?FAM=infrared&PN=HOA2001-001

or Banner SP100E&R

http://www.bannerengineering.com/products/subfam.php?subi_id=1066

Should I use PNP or NPN, Sourcing or Sinking, Light on or Light off?

Please help

Thanks

[Buechsenschuetz]

Which type of opto-sensors you should use completely depends on your application, and it is not possible to give you definite advice without knowing your application in detail.

Anyhow, since NI's boards have TTL level compatible inputs, you should use sensors with NPN output only. If the output of the sensor is activated (NPN transistor on), the input of the board will be tied to GND. If the output is not activated (NPN transistor off) the input will be tied to +5V by the internal pull-up resistors (it is not necessary to use the output pull-up resistor suggested by the opto-sensor manufacturer).

The decision to use light-on or light-off sensors rather depends on safety issues. You should make sure that the system is in a safe condition (for example, a condition which will not activate or which will stop a drive which might be harmful) even if a wire is broken or a plug is disconnected. Since the NI board have pull-up resistors, with the inputs open the TTL level will be high level. You should make sure that this is the output level of the opto sensor whent the drive in question is supposed to stop.

The digital inputs can be set to active high or active low by software. Of course the software settings have to match your hardware.

[Buechsenschuetz]

PS. A source output is equivalent to a PNP output, a sink output is equivalent to a NPN output. A sink output always has to be used with a pull-up resistor (connected to a +5V source of which the GND wire must be connected to GND of the board). On all NI boards I have seen the digital inputs have integrated pull-up resistors.

[Hassan]

Thank you very much for your response

I have another question

I am looking at Banner Amplifier MA3 which say Supply voltage 10 to 30 V dc

Can I use this with 7350. Seems like Controller 7350 will accept only 5V dc sensor?

http://www.bannerengineering.com/products/subfam.php?subi_id=1053

Previously I was think using MPC3 which is board mounted

Sensors I am using SP100E&R

http://www.bannerengineering.com/products/subfam.php?subi_id=1066&refsubi_id=1053

Thank again

[Buechsenschuetz]

I do not have the time to check the sensor specifications in detail.

But you can connect sensors with ANY supply voltage to the NI boards as long as their output(s) is/are compatible with TTL logic, or as long they have NPN transistor (open collector) output.

Connecting sensors with 24V outputs (as used in PLC controls) or PNP transistor output may damage the NI boards. And PNP transistor outputs usually are NOT compatible with TTL inputs.

In any case, the GND of the sensor supply voltage must be connected to DGND of the NI board.

[Hassan]

Thank you for your help