ni speedy power supply connector polarity

[rhm7]

I have purchased a new external power supply for the NI Speedy 33.  A new 9v DC 500ma+ external supply which has a connector that can make the tip hot, or the shell hot.  I assume the tip should be hot, but wanted to ask if any knew before I took any chances. 

[AnalogKid2DigitalMan]

From the manual:

Power Port

Caution

Do not connect the power source to the power port while the NI SPEEDY-33

device is connected to the PC.

The power port (J10) can supply the NI SPEEDY-33 with external power

when operating the device in standalone mode, without being connected to

the PC through USB. When power is supplied to the device, the power LED

lights.

The input voltage must be 9 VDC, at 500 mA, with the outside contact

being ground and inner contact being positive VDC. An appropriate

2.5 mm jack can be used in conjunction with a 9 V battery (pack) to

optionally supply power for battery-powered applications. Refer to

Appendix A,

Specifications, for complete power supply specifications.

http://www.ni.com/pdf/manuals/371577d.pdf

-AK2DM