Black Box RS IC107AE-R3 Manual de usuario descargar pdf (Pagina 17)

RS-232↔RS-422/485 CONVERTER (DATA ONLY)

Table A-2. Pinning of the RS-422/485 connector

(4-position terminal block).

Pin/Signal Function

TXA and TXB Data received by the Converter from the RS-232 port is

transmitted out of the unit over twisted-pair wires using

these two outputs. The “TX” LED indicates the state of these

two leads. When the TXA lead is positive with respect to the

TXB lead (a zero is being transmitted), the “TX” LED is lit.

RXA and RXB These are the received data inputs for the RS-422/485 port.

The status of these leads is monitored by the “RX” LED.

When the RXA lead is positive with respect to the RXB lead

(a zero is being received), the “RX” LED is lit.

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Black Box RS IC107AE-R3 Manual de usuario Pagina 17