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Chapter 4: Appendices – RS-485/422 Interface 4-9
Titan/cPCI User’s Manual, ver. 0.00
Appendix D: RS-485/422 Line Interface
Electrical Interface Selection
The Titan/cPCI adapter provides jumper selectable RS-232 and
RS-485/422 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-485/422 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-485/422.
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-485/422
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 metres