Q. How many Serial Connections can I have with Fitlet2?
Fitlet2 can support up to 3 Serial Connection including the following:
-1x SoC UART RS232 on SBC - Mini Serial Port Connector.
-1x Serial Port RS232/485 Full/Half Duplex configurable with FSCG-Kit - RJ45 Connector.
Q. How can I configure the Serial I want? (RS232/RS485 Full/ Half duplex)
The mini Serial Connector accessible from the SBC has only RS232 capabilities. For specific configuration, you can use the FSCG-Kit:
Configure the 2 switch on the FACET SBC:
| SW2 | SW1 | |
| ON | RS232 | Full Duplex |
| OFF | RS485 | Half Duplex |
Q. What is the Connection of the Ultra Mini Serial Connector?
Using the Accessory cables:
- CABDB9UMP (DB9-Female)
- ACCENC-ADPUMSER (DB9-Male)
DB9-M | Ultra Mini serial | RS232 Signal |
3 | 1 | TX |
7 | 2 | RTS |
2 | 3 | RX |
8 | 4 | CTS |
4 | 5 | Not Connected |
6 | 6 | Not Connected |
x | 7 | Not Connected |
5 | 8 | GND |
Q. What is the connection for the RS232 and RS485 with the FSCG-Kit FACET?
The connector on the FACET is one RJ45 Port.
Connector is RJ45. No Cable is provided with the FACET.
RJ45 Cable PINOUT:
| RJ45 | RS232 | RS485H | RS485F |
| Pin | Signal | Signal | Signal |
| 1 | RTS | TXN/RXN | TXN |
| 2 | DTR | ||
| 3 | TXD | TXP/RXP | TXP |
| 4 | GND | GND | GND |
| 5 | GND | ||
| 6 | RXD | RXP | |
| 7 | DSR | ||
| 8 | CTS | RXN |