Measurement Computing DBK Part 2 - Manual (Page 239)

Note that a single Daq-based data acquisition system can support up to 16 DBK208 boards, providing a
total of 256 channels. DBK208 boards contain two DB37 P2 connectors for the purpose of daisy-chaining
to other DBK208s or to other P2-supported devices.
The following illustration is an example of a Data Acquisition System that includes two DBK208 boards
for digital I/O. The two DBK208 boards are daisy-chained to a DBK209 P2 connector. The DBK209 is
connected to a DaqBoard/2000 Series board via a CA-195 cable.
Warnings, Cautions, and Tips
WARNING
Ensure that hard-wire emergency over-ride circuitry exists for all applications that
make use of dangerous switch-loads. Do not operate such switch-loads unless
emergency over-ride circuitry is present.
CAUTION
Turn off power to the host PC and externally connected equipment prior to connecting
cables or signal lines to the DBK. Electric shock or damage to equipment can result
even under low-voltage conditions.
Take ESD precautions (packaging, proper handling, grounded wrist strap, etc.)
Use care to avoid touching board surfaces and onboard components. Only handle
boards by their edges (or ORBs, if applicable). Ensure boards do not come into contact
with foreign elements such as oils, water, and industrial particulate.
Do not confuse connectors. Ensure that you only connect P1 I/Os to P1,
P2 I/Os to P2, and P3 I/Os to P3. Improper connection may result in equipment
damage.
DBK Option Cards and Modules 987594 DBK208, pg. 3