Titan/cPCI User’s Manual, Connect Tech Inc.

Multi-drop Slave Mode

In this mode the TxD line driver is enabled only when data is transmitted and RxD is enabled all the time. This mode is typically used in multi-drop "4 wire" connections. Please refer to Appendix D: RS-422/485 Line Interface for the jumper settings associated with this function.

Line Termination

You can terminate and bias TxD +/-, RxD +/-, RTS +/-, and CTS +/- on the individual RS-422/485 ports through jumper selectable 150 Ω fixed resistors. Please refer to Appendix D: RS-422/485 Line Interface for the jumper settings associated with this function.

Software Installation

Introduction

Titan/cPCI boards are standard multi-port serial adapters that utilize 16C950 UARTs. In many cases, users have software that will interface directly to the Titan/cPCI boards. Many operating systems come with handlers to control access to multiple 8250 style UARTs. Titan/cPCI adapters currently ship with device drivers for the following operating systems:

ƒQNX 4

ƒQNX 6

ƒWindows NT

ƒLinux

Before installing the Titan/cPCI software device driver, verify and note jumper settings described in Appendix D: RS-485/422 Line Interface for:

„Jumper block JA – Full duplex, half duplex and multi-drop slave control

„Jumper block JB – RS-232, RS-485/422 select

„Jumper blocks JC, JD, JE and JF – line bias/termination.

If you require further information please contact Connect Tech Technical Support.

Technical Tips:

Your Titan/cPCI adapter may ship with diskettes that include howto.txt or readme.txt files. Please examine these files for technical tips or release notes concerning installation and configuration of various device drivers and software utilities.

If you did not receive a driver diskette for your operating system or you require additional information, please go to the Download Zone of the Support Center on the Connect Tech website for product manuals, installation guides, diagnostic utilities and device driver software.

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