ADLINK ND-6067 - Manual (Page 274)

272
Appendix
Application Note
1. When setting the baud rate and checksum,
please connect the external Default pin to the
negative pin of the DC power supply (i.e. GND).
Please refer to the circuit path connection in
Figure A-1. After setting the device, turn off the
power supply and remove the connection
between Default and GND. It is now ready for use.
2. NEVER connect or disconnect the Default pin
signal while the unit is powered .
3. While powered up, please be careful when adding
or removing pin connectors.
4. Keep the module seated away from large power
source, strong magnets, etc.
5. Use a stable DC source. Avoid using large power
source with heavy loads (as motor). If using
batteries, please check to ensure for sufficient
capacity. Don’t mix VS+ and GND signals! Use a
10-30V DC source.
6. All NuDAM transmission lines must be shielded
twisted pairs (W22-26).
7. To prevent signal reflection, add a 120 Ohm
resister to the last module (see Figure A-2).
8. When using the ND-6531, by all means, must
connect the module’s FGND to the chassis’
Shield GND.
9. If using the ND-6018 Temperature Measurement
unit, please be sure not to place it in