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From: ehsjr on 6 Oct 2009 13:19
Chatarras wrote:
> Using either CR30-DN or CR30-15A0. According to the datasheet (Click
> on "CR Series - Catalogue": http://www.autonics.com/products/products_detail.php?catecode=01/01/03&db_uid=10)
> the current consumptiion is "Max.15 mA for the digital sensor (CR30-DN
> and a ----- or blank for the analog sensor. )
>
> First I don't understand why there is a blank for the analog sensor,
> does this mean it doesn't matter since it will take whatever it needs
> from the AC outlet? Then, I suppose for the DC sensor, which needs 15
> mA max, I could use a supply with multiple DC power outputs, (eight I
> need) at 24V that would supply these 15 mA for each sensor. What then,
> can I use? ( I assume I could use eight 24V ac adapters? but then its
> to many of them). Please if you can guide me, this is my first time
> supplying anything with power other than in the lab, If you know about
> <b> a "multiple DC output power supply" I could use or where to get it
> </b>. Or what is the best solution? I'm pretty sure this is a very
> simple thing to do, please let me know if this reasoning is correct,
> or even an article about this would be great.
>
> Thanks,
>
> Chatarras

The datasheet is here:
http://www.autonics.com/upload/data/CR%28KE-07-0140B%29.pdf
and here
http://www.autonics.com/upload/data/J-42~45%28CR%29.pdf

It shows up to 15 mA consumption current and up to 200 mA maximum
output current. You need to size your supply for the number of
sensors times 200 mA. For 8 sensors, you would want a supply
capable of 1.6 amps. The sensors are installed in parallel
across the 24 VDC supply; each load is installed between V+
(brown sensor wire) and the associated sensor's black wire
in the NPN version, or between the black wire and ground (blue
sensor wire) in the PNP version.

Per the first datasheet above, the output can be either Normally
Open or Normally Closed - there is no analog output.

+24 ---+-------------+---}}--+--------+
| | | |
|Brown [Load] | [Load]
| | | |
[CR30-DN]---Black--+ [CR30-DN]----+
| |
|Blue |
Gnd ---+------------------}}--+

NPN wiring shown above.

Ed
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