User manual

Titan/cPCI User’s Manual, Connect Tech Inc.
Revision 1.01 23
Titan/cPCI Rear I/O Opto 2 and 4 port adapters
• The four port Rear I/O Opto requires a four port Front I/O Titan to be installed.
• The two port Rear I/O Opto requires a two port Front I/O Titan to be installed.
• In either case, when using the Titan/cPCI Rear I/O Opto, the front I/O Titan/cPCI board must be
configured for RS-485, with no bias or termination jumpers installed. (Ensure the front
Titan/cPCI is clear of all jumpers if you are installing a Titan/cPCI Rear I/O Opto.)
Jumpers JA
through JD
Description Position/Function
1 RS-232/RS-485 select In = RS-232
Out = RS-485
2 RS-485 RX tri-state control In = ½ Duplex mode (2-wire)
Out = Full or Multi-drop (4-wire) mode
3 RS-485 RTS +/-
Termination resistor
RS-485 RTS+/- Terminator resistor, 150 ohms
4 RS-485 TxD +/-
Termination resistor
RS-485 TXD+/- Terminator resistor, 150 ohms
5 RX485 CTS +/- Bias and
Termination network
RS-485 CTS+/- Bias and termination. Both jumpers
must be installed at the same time.
6 RX485 CTS +/- Bias and
Termination network
RS-485 CTS+/- Bias and termination. Both jumpers
must be installed at the same time.
7 RX485 RXD +/- Bias and
Termination network
RS-485 RXD+/- Bias and termination. Both
jumpers must be installed at the same time.
8 RX485 RXD +/- Bias and
Termination network
RS-485 RXD+/- Bias and termination. Both
jumpers must be installed at the same time.
Table 4: Titan/cPCI Rear I/O Opto jumper descriptions
Note for Rear I/O Opto users:
All jumpers must be removed from the Front I/O Titan/cPCI when using
the Titan Rear I/O Opto.