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ECB-865

ECB-865 User’s Manual 37

3.11.17 Box Header Serial Port 1 / Serial Port 2 Connector in RS-422 (J9, J12)

Signal PIN Signal

NC 10 9 RI

CTS 8 7 RTS

DSR 6 5 GND

TxD+ 4 3 TxD-

RxD- 2 1 RxD+

3.11.18 Signal Description – Serial Port 1 / Serial Port 2 in RS-422 Mode (J9, J12)

TxD +/- Serial output. This differential signal pair sends serial data to the communication link. Data is

transferred from Serial Port 2 Transmit Buffer Register to the communication link, if the TxD

line driver is enabled through the Serial Port 2’s DTR signal. (Modem control register)

RxD +/- Serial input. This differential signal pair receives serial data from the communication link.

Received data is available in Serial Port 2 Receiver Buffer Register.

RTS +/- Request To Send. The level of this differential signal pair output is controlled through

the Serial Port 2’s RTS signal (Modem control register).

CTS +/- Clear To Send. The level of this differential signal pair input could be read from the Serial Port

2’s CTS signal. (Modem control register)

3.11.19 Box Header Serial Port 1 / Serial Port 2 Connector in RS-485 (J9, J12)

Signal PIN Signal

NC 10 9 CTS/RTS +

NC 8 7 CTS/RTS -

NC 6 5 GND

RxD/TxD + 4 3 RxD/TxD -

NC 2 1 NC

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Intel 815E Bedienungsanleitung Seite 47