1. Overview & Purpose

️· The WL40EW2KR is a wireless Modbus gateway. It allows a Modbus master device (like a PLC or computer) to communicate with Modbus slaves (sensors, actuators, etc.) wirelessly.
️· It supports both Modbus TCP and Modbus RTU protocols.
️· It's designed for applications needing wireless communication with Modbus devices.

2. Technical Specifications

️· Power: Selectable 12V or 24V DC input.
️· Wireless Protocol: 920 MHz band. (Important: This frequency band is region-specific. Check regulations.)
️· Modbus Support:
- Supports common Modbus function codes (01, 02, 03, 04, 05, 06, 15, 16).
- Can return exception codes 06 (Slave Device Busy) and 11 (Gateway Target Device Failed) to indicate errors.
️· Network Configuration: Configurable via a web browser interface. This allows setting IP addresses, subnet masks, default gateway, Modbus settings (port, timeout), and wireless parameters (PAN ID, encryption key, radio channel).
️· Web Browser Configuration: Detailed table outlining configurable parameters within the web interface including TCP/IP settings, Modbus settings, and Wireless Settings.
️· External Dimensions: Provided with diagrams, differing based on whether it's equipped with a sleeve or rooftop antenna.

3. Key Configuration Parameters (via Web Interface):

️· TCP/IP: IP Address, Subnet Mask, Default Gateway.
️· Modbus TCP: Port Number (default 502), Modbus Exception Response settings.
️· Wireless:
- PAN ID (Group Number).
- Radio Channel Number.
- Encryption Key.
- Network Join Mode (V3-compatible or Fast Join).
- Transmitter Power Output
- Device Type and Number in the Network
- Packet Filtering
- Short Address setting.

4. Physical Characteristics & Connections

️· Terminal Blocks: Uses Phoenix Contact MSTBV2.5/5-GF-5.08AU and TFKC2.5/5-STF-5.08AU terminal blocks.
️· Connectors: RJ-45 for Ethernet, USB for maintenance/configuration, and connector for power input.
️· LED Indicators: Power, Network Status (Link/Link100), 920Run, 920Link.
️· Reset Switch: To return to factory defaults or perform other resets.

5. System Configuration Example

️· Illustrates how the gateway connects a Modbus Master to multiple Modbus Slave devices wirelessly and also allows for communication with Modbus Slave devices via RS-485.

6. Important Notes

️· Frequency Band: The 920 MHz band is region-specific. Ensure compliance with local regulations.
️· Firmware Version: Check the operating manual (EM-9115-B) for firmware version information.
️· Documentation: Refer to the operating manual (EM-9115-B) for detailed instructions and troubleshooting.
️· Configuration: Configuration is primarily done through a web browser.