CM312 Datasheet, PDF (17/56 Pages) List of Unclassifed Manufacturers – Communications utilityModule

JP8
First
COM port
COM port configuration
1-2 installed = Disable Port
1-2 open = Enable Port
3-4 installed = select RS-232 mode
3-4 open = select RS-422/485 mode
5-6 installed = 120 ohm termination on RxD (for RS422/485 modes)
5-6 open = No termination on RxD (RS422/485 modes)
7-8 installed = 120 ohm termination on CTS (for RS422/485 modes)
7-8 open = No termination on CTS (RS422/485 modes)
JP9
Second
COM port
Default: 1-2 and 3-4 installed, 5-6 and 7-8 open to select enabled for RS-232
mode with no termination
COM port configuration
1-2 installed = Disable Port
1-2 open = Enable Port
3-4 installed = select RS-232 mode
3-4 open = select RS-422/485 mode
5-6 installed = 120 ohm termination on RxD (for RS422/485 modes)
5-6 open = No termination on RxD (RS422/485 modes)
7-8 installed = 120 ohm termination on CTS (for RS422/485 modes)
7-8 open = No termination on CTS (RS422/485 modes)
JP10
Third
COM port
Default: 1-2 and 3-4 installed, 5-6 and 7-8 open to select enabled for RS-232
mode with no termination
COM port configuration
1-2 installed = Disable Port
1-2 open = Enable Port
3-4 installed = select RS-232 mode
3-4 open = select RS-422/485 mode
5-6 installed = 120 ohm termination on RxD (for RS422/485 modes)
5-6 open = No termination on RxD (RS422/485 modes)
7-8 installed = 120 ohm termination on CTS (for RS422/485 modes)
7-8 open = No termination on CTS (RS422/485 modes)
JP11
Fourth
COM port
Default: 1-2 and 3-4 installed, 5-6 and 7-8 open to select enabled for RS-232
mode with no termination
COM port configuration
1-2 installed = Disable Port
1-2 open = Enable Port
3-4 installed = select RS-232 mode
3-4 open = select RS-422/485 mode
5-6 installed = 120 ohm termination on RxD (for RS422/485 modes)
5-6 open = No termination on RxD (RS422/485 modes)
7-8 installed = 120 ohm termination on CTS (for RS422/485 modes)
7-8 open = No termination on CTS (RS422/485 modes)
SW1
Default: 1-2 and 3-4 installed, 5-6 and 7-8 open to select enabled for RS-232
mode with no termination
I/O base address switch. See Base Address Table for details
CM312 Quad Serial utilityModule
7
RTD Embedded Technologies, Inc.