Campbell SC32B Instrukcja Użytkownika Pobierz pdf (Strona 7)

SC32B Optically Isolated RS-232

Interface

1. Function

FIGURE 1-1. SC32B Optically Isolated RS-232 Interface

The SC32B interfaces an RS-232 peripheral, commonly a computer or

terminal, to the CS I/O port of a Campbell Scientific datalogger. The SC32B

has the same functions as the SC32A. Functions include:

1. Converting datalogger logic levels to RS-232 logic levels.

2. Optically isolating the datalogger and the RS-232 peripheral. Optical

isolation separates the SC32B into a datalogger section and an RS-232

section. Signals entering from either side are electrically independent,

protecting against ground loops, normal static discharge, and noise.

3. Passing data when modem enable pin 5 is high and SDE/printer enable pin

6 is low (normal telecommunications mode).

The SC32B blocks data sent out the datalogger CS I/O port when the

SDE/print enable pin 6 is high. This prevents data sent to an SDE device (for

example, storage module) or printer output from being sent out the RS-232

port. The SC32B cannot be configured to pass Instruction 96 serial printer or

computer data. Contact Campbell Scientific if this capability is required.

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Campbell SC32B Instrukcja Użytkownika Strona 7