Omega Engineering OMB-DBK-34A, User Manual

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Channel and Card Selection Configuration (J1 and S1)
Up to 4 DBK7 cards can connect to a single main channel. Thus, a 16-channel LogBook or Daq device
can connect to 64 DBK7 cards. Since each card has 4 input channels, a fully populated system can use 256
input sensors. To keep these inputs organized, the card is configured by physically setting a jumper (J1)
and a DIP switch (S1).
•
J1 is a 24-pin (3×8) header requiring two pins in a row to be connected. Up to 4 cards can share the
same channel.
•
S1 is a 6-position DIP switch (positions 3-6 set the main channel). Each card sharing a main channel
can have one of four sub-addresses (card number) as set by S1 (positions 1 & 2).
J1, S1, and the software must all be set to the same channel.
Set the main channel and sub-address as follows:
1. Determine the main channel and card number for each DBK7 used. It may be necessary to check the
software setup and other cards in the system to avoid a conflict. Note that a DBK7 may share a
channel with 3 other DBK7s. Each card sharing a LogBook or Daq device base channel must use a
unique card number sub-address.
2. Set the J1 jumper across the 1st and 2nd or the 2nd and 3rd pin of a row to the desired channel.
Refer to the silk screening just above the jumper for proper positioning (see previous figure).
3. Set S1 DIP switches 3-6 (OC0 to OC3) to match the channel selected on J1, and verify both settings
(S1 and J1) are correct (see previous figure).
4. Set S1 DIP switches 1 & 2 (CRD0 and CRD1) to give the card a unique sub-address with the chosen
main channel. Any unused sub-address in the range 0-3 is valid (see following figure).
DBK7, pg. 4
879895
DBK Option Cards and Modules