B&B Electronics Vlinx Serial Servers ESP901E Especificações descarregar pdf (Página 10)

6 Documentation Number: ESP901-2303 Manual

B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104

B&B Electronics Ltd – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445

RS-232 Interface

The RS-232 supports 8 channels plus Signal Ground and is configured as DTE like a

computer. Signals are single ended and referenced to Ground. To used handshaking,

Flow Control must be set to RTS/CTS during Configuration. Refer to the Pin out

table for connections.

RS-422 Interface

The RS-422 mode supports 4 channels with full duplex operation for Receive,

Transmit, RTS (Request To Send) and CTS (Clear To Send). The data lines are in

differential pairs with the B lines positive relative to the A lines. Ground provides a

common mode reference. To use handshaking Flow Control must be set to RTS/CTS

during configuration. Refer to the Pin out table for connections.

RS-485 Interface

The RS-485 mode supports the Transmit and Receive Channels using 2-wire half-

duplex operation. The data lines are differential with the Data B line positive relative

to Data A in the Mark state. Ground provides a common mode reference. Refer to

the Pin out table for connections.

Internal Setting To Select RS-485 Bias

You can select RS-485 Receiver Biasing from the ESP901 if your network doesn’t

supply any. Remove the two side cover screws, slide the cover off, and then set the

two bias jumpers (shown open) to enable biasing (shorting).

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B&B Electronics Vlinx Serial Servers ESP901E Especificações Página 10