ADLINK Technology NuDAM ND-6510, Руководство пользователя, Страница: 11 / 47

Introduction 1-7
1.7 Constructing a NuDAM Network
Go through the following steps, the user can construct a NuDAM
network easily.
1. Setup a ND-6520.
2. Connect the host computer with the ND-6520.
3. Setup one or more ND-6510 if necessary.
4. Connect the ND-6510 to extend to RS-485 bus if necessary.
5. Install the NuDAM utility software from disk.
6. Initialize the brand-new NuDAM modules.
7. Add the new NuDAM modules into RS-485 network.
Refer to chapter 2 for executing step 1 and 2. Refer to chapter 3
for executing step 3, 4 and for understanding the time to install
ND-6510. The knowledge about the software for operating the
NuDAM is in chapter 5. For executing the step 6 and step 7, refer
to chapter 4.
1.8 Termination Bus
In order to avoid signal reflections on the bus, each bus segment
has to be blanked off at its physical beginning and at its end with
the characteristic impedance. An termination resister ( Rt) is
intalled for this purpose. The Rt value - 120
Ω ±
2% is
recommended, and the detailed connection of Rt can be referred
from the “Terminator Connection” diagram below.
Terminator Connection
Host
Data+
Data-
120 ohms
Data+
Data-
120 ohms