Readme – Connect Tech Titan/cPCI User Manual

Page 29

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

Revision 1.01

Titan/cPCI Rear I/O Opto Electrical Interface Selection

The Titan/cPCI Rear I/O Opto adapter provides jumper selectable RS-232 and RS-422/485
electrical interfaces on each port.

Jumper blocks JA, JB, JC, JD set the electrical interfaces for the individual ports. Jumpers
installed across the pins at position 1 on jumper blocks JA, JB, JC, JD enable the RS-232
interface for that port, while jumpers not installed across these pins enable the RS-422/485
interface for that port.

Figure 5

shows the location of jumper blocks JA, JB, JC, JD.

Technical Tip
Please refer to the

README

files on the driver diskettes for technical

tips or release notes concerning installation and configuration of
various device drivers and software utilities. If you require further
information please contact Connect Tech’s

Technical Support.

Example 1

This example shows the settings on jumper
blocks JA, JB, JC, JD of the
Rear I/O Opto so that port 2 is set for RS-232
and ports 1, 3, 4 are set for RS-422/485.

Port 1

Port 2

Port 3

Port 4

Jumper Legend

1 = RS-232/RS-422/485

select

2 = RS-422/485 half

duplex mode control

3 = RTS +/- termination
4 = TxD +/- termination
5 = CTS +/- termination
6 = CTS +/- termination
7 = RxD +/- termination
8 = RxD +/- termination

Example 2

This example shows the settings on jumper block
JA, JB, JC, JD so that ports 1 & 2 are set for
RS-422/485 and ports 3 & 4 are set for RS-232.