Campbell-scientific MCR1 Memory Card Reader Manual do Utilizador descarregar pdf (Página 7)

A-1

APPENDIX A. RS232 D-CONNECTOR PIN FUNCTIONS

Pin Number Function

1 Protective ground, internally connected to pin 7

2 Tx receive data line, from DTE

3 Rx transmit data line, to DTE

4 RTS request to send, input from DTE

5 CTS clear to send, to DTE, normally held high by the MCR1

6* DSR data set ready, to DTE, held high at +5 V

7 Signal ground

8* DCD data carrier detect, to DTE, held high at +5 V

* directly connected to the internal 5V supply, do not short to ground.

1. Unlike the CSM1/ SC532, only RTS is required for telecommunications mode; the DTR line is

not used.

2. Only pins 2, 3, 4 and 7 need to be connected for use with the CSMCOM program. For

connection to a PC these pins should be connected to the equivalent function pins on the PC's

DTE interface.

1 2 3 4 5 6 7 8 9 10

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Campbell-scientific MCR1 Memory Card Reader Manual do Utilizador Página 7