OMB-DAQ-2408 Series User's Guide
Functional Details
18
Caution!
The discharge of static electricity can damage some electronic components. Before removing the
OMB-DAQ-2408 Series device from its housing, ground yourself using a wrist strap or touch the
computer chassis or other grounded object to eliminate any stored static charge.
To open the case and set the J6 jumper, do the following.
1.
Turn the device over and rest the top of the housing on a flat, stable surface.
2.
Peel off the four rubber feet on the bottom of the device to access the screws.
3.
Remove the four screws from the bottom of the device.
4.
Hold both the top and bottom sections together, turn the device over and rest it on the surface, then
carefully remove the top section of the case to expose the circuit board.
5.
Configure jumper
J6
for either pull-up, pins 1-2, or pull-down, pins 2-3. The jumper is configured by
default for pull-up. Figure 11 shows the location of the jumper on the board.
Figure 11. Location of J6 jumper
Figure 12 shows the jumper configured for pull-up and pull-down.
Figure 12. J6 jumper configurations
6.
Replace the top section of the case, and fasten it to the bottom section with the four screws. Replace the
rubber feet.
For more information about digital signal connections
For more information on digital signal connections and digital I/O techniques, refer to the
OMB-DAQ-2400,
OM-USB, OM-WEB, and OM-WLS Series General Guide to Signal Connections
(available on our web site at
www.omega.com/manuals/manualpdf/M4830.pdf
).
The pull-up/pull-down voltage is common to all of the internal 47 kΩ resistors.
