User`s manual

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Introduction

1.7 Constructing a CYMOD Network

1. Set up a CM 4520 or CM 4530.

2. Connect the host computer with the CM 4520 or CM 4530.

3. Set up one or more CM 4510 if necessary.

4. Connect the CM 4510 to extend to RS-485 bus if necessary.

5. Install the CYMOD utility software or CM 4530 driver from disk.

6. Initialize the brand-new CYMOD modules.

7. Add the new CYMOD modules into RS-485 network.

Refer to chapter 2 and chapter 4 for executing step 1 and 2. Refer to chapter 3

for executing step 3. Chapter 4 explains the best time to install CM 4510. The

information about the software for operating the CYMOD is in chapter 6. For

executing step 6 and step 7, please refer to the install procedures of each

module along with chapter 6, "Software Utility."

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. A termination resister ( Rt) is intalled for this purpose. The Rt

value - 120Ω ± 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