Campbell-scientific SC105 9-pin to RS232 DCE Interface Instrukcja Użytkownika Pobierz pdf (Strona 7)

SC105 CS I/O to RS-232 Interface

1. General Description

FIGURE 1-1. SC105 CS I/O to RS-232 Interface

The SC105 (FIGURE 1-1) is used to interface a Campbell Scientific datalogger

to any modem that is configured with an RS-232 DCE (Data Communications

Equipment) serial port. The SC105 is an intelligent interface that buffers data

(1 kB buffer size), allowing many RS-232 data rates, and all CS I/O port

modes.

Features include:

• True RS-232 signal levels.

• Power for the SC105 is supplied from the 5 V supply on pin 1 of the

datalogger’s CS I/O port. The SC105 will use the 5 V supply to power the

RS-232 modem if needed.

• Two way (interactive) communication.

• Supports most RS-232 baud rates.

• Supports all CS I/O port modes.

The SC105 is frequently used with a short haul modem to communicate across

a dedicated line made of two pairs of twisted wire with a shield. Section 3, Set-

up Menu, describes the details of this application using a short haul modem

built by RAD.

The SC105 is also commonly used with satellite transmitters, cellular modems,

and spread spectrum radios.

The SC105 also supports one-way output or printer communication.

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Campbell-scientific SC105 9-pin to RS232 DCE Interface Instrukcja Użytkownika Strona 7