Titan/cPCI User’s Manual, Connect Tech Inc.
Revision 1.01
25
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
.
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
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.
JA
1
2
3
4
5
6
7
8
JB
1
2
3
4
5
6
7
8
JC
1
2
3
4
5
6
7
8
JD
1
2
3
4
5
6
7
8
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.
JA
1
2
3
4
5
6
7
8
JB
1
2
3
4
5
6
7
8
JC
1
2
3
4
5
6
7
8
JD
1
2
3
4
5
6
7
8
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
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.
