User manual

Chapter 2: Installation and Configuration
19
Note Positive and negative differential inputs should not be
driven by voltages more then AGND ±14V.
When wiring applications to your PowerDAQ board, consider the
following:
• When working in an environment with electrical noise or
when using gains, use differential input.
• When working in an environment with electrical noise,
use individually shielded twisted-pair wiring.
• Physically separate wiring paths or conduits carrying
power lines and signal lines.
• Signal cables should never be put in the same wiring
harness as high-current or high-voltage cables. Avoid
routing signal and power cables together in parallel paths
unless a reasonable distance separates the paths —
reasonable being determined by the strength of the
power signals and the amount of shielding.
• Signal lines near devices that create high levels of
electrical noise should be run through a metal cable
trough above or below the work area.
• Power lines, poorly designed video monitors and
switching power supplies, solenoids, electric arcs from
breakers or welders, and unshielded signal cables can
affect the accuracy of your measurements.
Installing Multiple Boards (PD-CBL-SYNC):
You can install multiple PowerDAQ boards in one PC. The internal J6
synchronization header will allow a master/slave configuration to be
setup. A special PowerDAQ cable (PD-CBL-SYNC): will allow you to
connect up to four boards in one PC. Synchronization cables for more
than four boards are available from your distributor or the factory.