Black Box IC108AE, IC109C, IC109AE, IC109A-R2, IC108C manual Pin Name Description

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APPENDIX A: Pinning

 

Table 4. RS-485 pinning chart.

 

 

Pin Name

Description

 

 

TXA and TXB

Data received by the RS-232485/422 Converter at the

TXA=TX-

RS-232 port is transmitted out of the unit over twisted-

TXB=TX+

pair wires via 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” being

 

transmitted), the TX LED is lit.

 

 

RXA and RXB

These are the received data inputs for the RS-485 port.

RXA=RX-

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

RXB=RX+

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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Contents IC109AE FCC and IC RFI Statements RS-232↔485/422 Converters NOM Statement Trademarks Used in this Manual Contents Specifications Specifications Introduction Installation Jumper and Switch ConfigurationLayout of the Printed Circuit Board RS-232↔485/422 Converter as DCE XW1A 8-Position Shunt Driver Enabled by Data Point-to-Point DCE/DTE Configuration Function Jumper Requirements RS-232↔485/422 Converters Installation RS-232↔485/422 Converters Simplified Functional Block Diagram DTE Operation DTE Jumper Settings Installation Typical Applications Point-To-Point, 4-Wire Full- or Half-Duplex Multipoint, 4-Wire Half- or Full-Duplex Multipoint, 2-Wire Half-Duplex Sample Multipoint Operation Installation Appendix A. Pinning DCE DTEPin Name Description Quick Reference User-Selectable Options XW1BQuick Reference USER-SELECTABLE Options Copyright 2002. Black Box Corporation. All rights reserved