Data Translation DT300 Series, User Manual

Page: 43 / 164

Wiring Signals
43
Before Wiring
This section describes wiring recommendations and the pin assignments of the STP300 screw
terminal panel.
Wiring Recommendations
Keep the following recommendations in mind when wiring signals to the STP300 screw
terminal panel:
• Follow standard ESD procedures when wiring signals to the board.
• Use individually shielded twisted-pair wire (size 14 to 26 AWG) when using the DT300
Series board in a highly noisy electrical environment.
• Separate power and signal lines by using physically different wiring paths or conduits.
• To avoid noise, do not locate the STP300 screw terminal panel and cabling next to sources
that produce high electro-magnetic fields, such as large electric motors, power lines,
solenoids, and electric arcs, unless the signals are enclosed in a mumetal shield.
• When first installing the board, we recommend that you do the following:
−
Wire a function generator or a known voltage source to analog input channel 0 (use the
differential configuration).
−
Wire an oscilloscope or voltage meter to analog output channel 0.
−
Wire a digital input to digital I/O Port A.
−
Wire a external clock or scope to counter/timer channel 0.
−
If you have not done so already, install the DT300 Series software.
−
Run the Quick DataAcq application (described in page 59 ) to verify that the board is
operating properly.
−
Once you have determined that the board is operating properly, wire the signals
according to your application’s requirements.
STP300 Screw Terminal Assignments
With the connector held up, the screw terminals on the right side of the STP300 match pins 23
to 34 and pins 57 to 68 of the standard 68-pin connector on the DT300 Series boards; these
screw terminals represent the analog I/O signal connections. The remaining screw terminals
are located on the left side of the STP300 screw terminal panel and are provided for the digital
I/O, counter/timer, and +5 V power signals.
The following subsections describe the screw terminal assignments on the STP300 screw
terminal panel by function.