Campbell-scientific NL200/NL201 Network Link Interface Uživatelský manuál stáhnout pdf (Strana 15)

NL200/201 Network Link Interface

4. Overview

The NL200/201 Network Link Interface is a device used to communicate with

Campbell Scientific dataloggers and peripherals using an Ethernet 10/100

Mbps communications link. The NL200/201 includes a CS I/O port and an

RS-232 port for communication. A USB device port is used for configuring

the NL200/201 device.

FIGURE 4-1. NL201

Bridge Mode Enabled

The NL200/201 can be configured to bridge Ethernet and CS I/O

communications (Bridge Mode enabled). This mode is used for providing

access to the internal IP functionality of the CR800/850, CR1000, and CR3000

(e.g., web page access, email, FTP, etc.). Bridge mode does not utilize PPP.

Instead, raw IP packets are transferred between the Ethernet and CS I/O

connections.

FIGURE 4-2. Bridge Mode enabled

Bridge Mode Disabled

With Bridge Mode disabled, the NL200/201 can provide multiple services

simultaneously including TCP Serial Server, TCP Serial Client, Modbus

TCP/IP Gateway, and PakBus® router. The NL200/201 can act as a serial

server and PakBus router simultaneously. However, each physical port (RS-

232 and CS I/O) is only associated with one service (PakBus router, serial

server, Modbus/TCP Gateway, etc.) at a time. For example, you can have an

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Campbell-scientific NL200/NL201 Network Link Interface Uživatelský manuál Strana 15