Measurement Computing Data Translation DT9857, User Manual

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Wiring Signals
43
Preparing to Wire Signals
This section provides recommendations and information about wiring signals to a DT9857 or
DT9857E module.
Wiring Recommendations
Keep the following recommendations in mind when wiring signals to a DT9857 or DT9857E
module:
• Follow standard ESD procedures when wiring signals to the module.
• Separate power and signal lines by using physically different wiring paths or conduits.
• To avoid noise, do not locate the module and cabling next to sources that produce high
electromagnetic fields, such as large electric motors, power lines, solenoids, and electric
arcs, unless the signals are enclosed in a mumetal shield.
• Prevent electrostatic discharge to the I/O while the module is operational.
• Connect all unused analog input channels to analog ground.
Warm-Up Time
The DT9857 and DT9857E modules are ideal for acoustic measurements due to their AC
coupling and frequency characteristics. They were not designed for DC stability; therefore,
ensure that you allow the module to warm up for 1 hour before use.
Wiring Signals to the Module
Figure 12 shows the connectors on the front and rear panels of the DT9857 module. Figure 13
shows the connectors on the front and rear panels of the DT9857E module.