AT-MIO-16D Digital Output wiring

I need to drive a relay coil from one of the outputs of an AT-MIO-16D module.
From the AT-MIO-16D User Manual (p. 2-35) it remains unclear for me
how to do it. It seems that the Digital outputs are of "sinking" type, i.e.
they
connect to either ground or to a high resistance, however the electrical
specifications
considers both output "source" and "sink" currents.
Assuming "sink" type, I think the wiring should be as follows:
+5Vdc to relay coil (flyback diode in parallel)
relay coil to DAQ module output point
-5Vdc common to DAQ Dig Gnd point
My questions are:
1. Is my suggested wiring right?
2. Do I need some resistor to limit the current through the DAQ board or
is the coil resistance enough?
3. How do I protect t
he module against the reverse voltage generated in the
coil once
disconnected? With the flyback diode suggested I am protecting the power
supply
output but not the DAQ module.
Please attach a suggested wiring diagram to your answer.
Thanks in advance for your support.

We use a MOSFET (2N7000) switch in our systems to isolate the DIO ports from the relay drive. The attached schematic shows the circuit.
One problem we have with this is when the board powers up the DIO ports are configured as inputs, and the circuit sees enough voltage to turn on. The 47k resistors were recently reduced to this from 100k, which seemed to help.
Attachments:
DIO_Relay_Drive.bmp ‏1440 KB

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schematic.png ‏16 KB

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