Matrix Switching System—Instruction Manual | Page 25 |
APPENDIX – Matrix Switch Communication Protocol
The RS-232/RS-485 communications are half-duplex with variable byte count packets. For RS-232, the matrix switch operates as a DCE device and therefore can be connected using a straight cable to a DTE device such as a computer. The RS-232 connector is a DB-9 female. For RS-485, a discrete wiring connector is provided for custom connection to any RS-485 equipment. For full details on connecting to the matrix switch refer to the User Manual.
Default Communication Settings – 9600, N, 8, 1
Baud Rate | 9600 |
Parity | None |
Data Bits | 8 |
Stop Bits | 1 |
DIP Switch Description
SW1-SW5: Machine ID (address) 0=ON, 1=OFF
SW1 | SW2 | SW3 | SW4 | SW5 | Notes |
|
| | | | | |
0 | 0 | 0 | 0 | 0 | Address for RS-232/RS-485 Master only |
0 | 0 | 0 | 0 | 1 | Addresses for Slave devices |
~ | ~ | ~ | ~ | ~ |
1 | 1 | 1 | 1 | 1 | |
SW6-SW7: RS-485 TX/RX Terminating Resistor |
0=ON, 1=OFF | | | | |
SW6 | SW7 | Notes |
| | |
0 | 0 | Resistor ON |
1 | 1 | Resistor OFF |
1 | 0 | Invalid |
0 | 1 | Invalid |
SW8: RS-232/RS-485 Master or RS-485 Slave 0=ON, 1=OFF
0RS-485 Slave Device
1RS-232/RS-485 Master
