Campbell CR1000 Instrukcja Użytkownika Pobierz pdf (Strona 3)

Interfacing the MICROCOM DESIGN GTX Modulator to the Campbell Scientific CR1000 Data Logger PRELIMINARY

Figure 3 CR1000

Figure 2 and 3 are diagrams of the GTX and CR1000. As can be seen there are two D9 serial

ports shown on the CR1000 device. One is a proprietary serial port (TTL and non standard pin

out), while the other is a standard RS232 port. It is certainly feasible to connect the GTX to the

RS232 D9, however, upon further examination it can be seen that on the lower terminal block,

that 4 each 2 wire com ports are available. These ports were TTL level on older Campbell

devices like the CRX10. However on the CR1000 these ports can be programmed for RS232

levels.

The main connections to the CR1000 are shown below. A direct connection from the PC

through a standard 232 cable is made to communicate and program the CR1000. Power (+12v)

is connected to the POWER IN port of the CR1000.

For our setup we will use COM4 to connect to the RS232 serial line of the GTX. A three wire cable

is connected as shown.

uAPP222 (v1.0) July 12, 2005 http://www.microcomdesign.com 3

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Campbell CR1000 Instrukcja Użytkownika Strona 3