SAJ

Supported Devices

Configuration

1: Physical Connection Setup

For Ethernet Connection:

1. Locate the communication interface on your SAJ inverter
2. Connect an ethernet cable between the inverter and your local network
3. Follow the ethernet wiring guidelines for proper installation

For RS485 Connection:

1. Locate the RS485 port on your SAJ inverter
2. Connect the RS485 cable according to the following pinout:
   • PIN A: RS485+
   • PIN B: RS485-
   • GND: Ground (if available)

2: Network Configuration

1. By default, the inverter is set to obtain an IP address automatically via DHCP
2. If using a static IP configuration:
   • Access the inverter's web interface
   • Navigate to Network Settings
   • Configure the IP address, subnet mask, and gateway as needed

3: Communication Settings

For optimal performance, ensure the following communication parameters:

• Modbus TCP port: 502 (default)
• RS485 baud rate: 9600
• Data bits: 8
• Stop bits: 1
• Parity: None

Wiring

Ethernet Connection

• Use CAT5e or CAT6 ethernet cable
• Maximum cable length: 100 meters
• Follow the guidelines for ethernet wiring

RS485 Connection

• Use shielded twisted pair cable
• Maximum cable length: 1000 meters
• Connect the shield to ground at one end only
• Maintain proper RS485 bus topology

eSAJ Home settings

Troubleshooting

Common issues and solutions:

1. No Communication

   • Check physical connections
   • Verify network settings
   • Ensure proper Modbus address configuration

2. Intermittent Connection

   • Check cable quality and connections
   • Verify there's no electromagnetic interference
   • Ensure proper cable routing