How to Set up RS422 Serial Connection
1. Physical Connection Setup
Hardware Requirements
- MOXA Uport 1150 device
- Serial cable
- RobustOS PRO device with RS422 interface
Pinout Connections
Connect the following pins between your devices:
- T+ → RX1+
- T- → RX1-
- R+ (D+) → TX1+
- R- (D-) → TX1-
- GND → GND
Note: Always verify the pinout diagram with your specific device's documentation as pin assignments may vary between manufacturers.
2. Gateway Configuration
Web UI Configuration
1. Navigate to Interface → Serial Port → COM1
2. Configure the following parameters:
- Serial Port Application settings
- Server port settings
- Enable the port
LED Indicator Setup
1. Navigate to Services → Advanced
2. Set USR1 LED Type to COM1
- This configures the LED to indicate serial data activity
3. Verification and Testing
Physical Connection Verification
- Check all cable connections are secure
- Verify ground connection is properly established
- Inspect for any bent pins or damaged connectors
Communication Testing
1. Monitor USR1 LED
- Should flash when data is transmitted/received
2. Use terminal software to send test data
3. Verify data reception on receiving device
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