Connect Tech Titan/cPCI - Manual (Page 24)

Titan/cPCI User’s Manual, Connect Tech Inc.
Revision 1.01 19
Appendix D: RS-422/485 Line Interface
Titan/cPCI adapters Electrical Interface Selection
The Titan/cPCI adapter provides jumper selectable RS-232 and RS-422/485 electrical interfaces
on each port.
Jumper block JB sets the electrical interfaces for the individual ports. Jumpers installed across
the pins on jumper block JB enable the RS-232 interface for that port, while jumpers not
installed across pins enable the RS-422/485 interface for that port.
Figure 1 shows the location
of jumper block JB.
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 Technical Support
Example 1 This example shows the settings on jumper block
JB so that port 2 is set for RS-232 and ports 1, 3,
4 are set for RS-422/485.
JB
Jumper Legend
Jumpers on = RS-232
enabled Port 1
Port 2
Port 3
Port 4
4 port models only
JB0
JB1
JB2
JB3
Example 2 This example shows the settings on jumper block
JB so that ports 1 & 2 are set for RS-422/485
and ports 3 & 4 are set for RS-232.
JB
Jumper Legend
Jumpers on = RS-232
enabled Port 1
Port 2
Port 3
Port 4
4 port models only
JB0
JB1
JB2
JB3
Technical Note:
You can set up the RS-232 serial ports to run at up to 230.4
Kbps, but you must use good quality serial cables with lengths
that do not exceed 2 meters.