Moxa Technologies NPort 5200 Serie User Manual download pdf (Page 37)

CN2610 User’s Manual Knowing Your Application

3-7

LAN A

LAN B

RS-232/422/485

Remote Terminal Unit (RTU)

Primary

Data

Primary PC

Backup PC

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Reset

Ready

SELMENU

CN2610

16 port RS-232 Async Server

Backup

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Reset

Ready

SELMENU

CN2610

16 port RS-232 Async Server

This type of highly redundant setup is implemented with two CN2610s, as shown above in the

structure diagram. All aspects of the system are backed up, including the PC hosts, the networks,

and the CN2610s. The entire system will continue operating in the following situations:

1. When the Primary PC and LAN A fail at the same time (the backup PC and LAN B will take

over).

2. When the Primary PC and the Primary CN2610 fail at the same time (the backup PC and the

backup CN2610 will take over).

3. When LAN A and the Primary CN2610 fail at the same time (LAN B and the backup CN2610

will take over).

NOTE

The RS-232 connector on the Remote Terminal Unit (RTU) shown above must be setup with an

RS-232 to RS-422/485 converter, such as the MOXA TCC-100I, to convert RS-232 signals to

RS-485 signals. The connectors on the two CN2610s will also need to use converters, such as the

MOXA TCC-100I. In this way, users can take advantage of RS-485’s multi-drop feature to share

data with the secondary CN2610.

Refer to Chapter 7 for detailed information and configuration instructions.

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Moxa Technologies NPort 5200 Serie User Manual Page 37