4M30 Camera User’s Manual
40
DALSA
03-32-10030-04
Figure 9. EIA-644 Example
Unused EIA-644 Inputs and Outputs
Unused
outputs
should be left unconnected. This will reduce power dissipation within the camera
and reduce radiated emissions.
Unused
inputs
should also be left unconnected; EIA-644 chips have fail-safe features that
guarantee a known logic state (HIGH) in fault conditions (unconnected, shorted, or unterminated).
Do not connect cables to unused inputs.
Cables can act as antennae and cause erratic camera
behavior.
Cable Lengths
Figure 10 shows a graph of ideal communication data rate vs. cable length for the EIA-644
standard.
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