Omega Engineering OMB-DBK-34A, User Manual

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Hardware Setup
Card Connection
The DBK9 is equipped with screw terminals for the connection of 3-wire or 4-wire RTDs as shown in the
figure.
Card Configuration
Factory Defaults: JP2 RTD Type: 100ohm
JP3 RTD Source Type: 100 ohm
Two aspects of card configuration are the channel address and the RTD type.
Channel Address Jumpers
Channel Group Select (JP4)
One or two DBK9s may be connected to each channel (2×8 signals × 16 channels for a maximum of 256
inputs). Since this is a daisy-chain type of interface, each card must appear unique to the LogBook or the
Daq Device. This is accomplished by setting the Channel Select jumper (JP1) and the Channel Group
Select jumper (JP4) of each DBK9. JP4 selects either Upper (8-15) or Lower (0-7) channels.
No two cards in a system are to have the same channel settings.
RTD Type Selection Jumpers (JP2 and JP3)
The DBK9 was designed to measure 100 Ohm, 500 Ohm, and 1000 Ohm RTDs (all 8 RTDs must be the
same type for each DBK9). The different RTD types can be selected by changing the RTD Type jumper
(JP2) and the RTD Voltage Source jumper (JP3). The default settings are shown in the figure.
JP2 and JP3 must use the same setting.
DBK9, pg. 2
879895
DBK Option Cards and Modules