Data Translation DT340, Getting Started Manual

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Wiring Signals
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Before Wiring
This section describes wiring recommendations and the pin
assignments of the STP340 screw terminal panel.
Wiring Recommendations
Keep the following recommendations in mind when wiring signals to
the STP340 screw terminal panel:
• When using clock sources greater than 1 MHz, use
counter/timers 0 to 3. This is the CE configuration of the board.
• Use individually shielded twisted-pair wire (size 14 to 26 AWG)
when using the DT340 board in highly noisy electrical
environments.
• Separate power and signal lines by using physically different
wiring paths or conduits.
• To avoid noise, do not locate the STP340 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.
• Connect the shields to one end only (either at the STP340 or at the
signal source).
CAUTION:
To avoid electrical damage, ensure that power is turned off to the
computer and to any attached devices before wiring signals to the
STP340 screw terminal panel.