Connect Tech JB1 Appendix D RS-485/422 Line Interface, Electrical Interface Selection, Example

Chapter 4: Appendices – RS-485/422 Interface 4-9

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

JB0	Port 1	Jumper Legend
		Jumpers on = RS-232 enabled
JB1	Port 2
JB2	Port 3	4 port models only
JB3	Port 4

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

JB0	Port 1	Jumper Legend
		Jumpers on = RS-232 enabled
JB1	Port 2
JB2	Port 3	4 port models only
JB3	Port 4

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

Titan/cPCI User’s Manual, ver. 0.00