How to Set up RS422 Serial Connection

How to Set up RS422 Serial Connection

1. Physical Connection Setup

Hardware Requirements

  1. MOXA Uport 1150 device
  2. Serial cable
  3. RobustOS PRO device with RS422 interface

Pinout Connections

Connect the following pins between your devices:
  1. T+ → RX1+
  2. T- → RX1-
  3. R+ (D+) → TX1+
  4. R- (D-) → TX1-
  5. 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:
  1. Serial Port Application settings
  2. Server port settings
  3. Enable the port

LED Indicator Setup

1. Navigate to Services → Advanced
2. Set USR1 LED Type to COM1
  1. This configures the LED to indicate serial data activity

3. Verification and Testing

Physical Connection Verification

  1. Check all cable connections are secure
  2. Verify ground connection is properly established
  3. Inspect for any bent pins or damaged connectors

Communication Testing

1. Monitor USR1 LED
  1. 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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