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Cables, connectors, switches, contactors, sensors and other items / Re: Relays
« on: February 09, 2015, 12:40:14 PM »
Hi Todd,
The style of relay that you show draws too much coil current to run directly
from the logic level outputs of the PMDX-12, even if it were a 5 volt version,
and I regret to tell you that the SSR-25 that Bob mentioned will not work for
DC loads.
Here is an example of a relay that should work:
http://www.digikey.com/product-detail/en/HE751A0510/HE124-ND/475785
This relay provides an internal diode, but you must wire up the connections
to both the coil and the diode. Connect one end of the coil and the Cathode
end of the diode to the output from the PMDX-126. Connect the other end
of the coil and the Anode of the diode to the PCgnd from the PMDX-126.
This relay has a coil current of only 10 milliAmps which makes it possible
to drive it from the logic level output. It can switch up to 500 milliAmps.
My best guess is that your laser diode needs 100 to 200 milliAmps to
operate.
Steve
The style of relay that you show draws too much coil current to run directly
from the logic level outputs of the PMDX-12, even if it were a 5 volt version,
and I regret to tell you that the SSR-25 that Bob mentioned will not work for
DC loads.
Here is an example of a relay that should work:
http://www.digikey.com/product-detail/en/HE751A0510/HE124-ND/475785
This relay provides an internal diode, but you must wire up the connections
to both the coil and the diode. Connect one end of the coil and the Cathode
end of the diode to the output from the PMDX-126. Connect the other end
of the coil and the Anode of the diode to the PCgnd from the PMDX-126.
This relay has a coil current of only 10 milliAmps which makes it possible
to drive it from the logic level output. It can switch up to 500 milliAmps.
My best guess is that your laser diode needs 100 to 200 milliAmps to
operate.
Steve