Description
The IP Relay HWg-ER02b is a network-connected relay controller that allows remote control of digital outputs and serial devices over Ethernet. It features two digital inputs for monitoring dry contacts or switches and two relay outputs capable of switching 230V/16A loads.
This device supports Modbus/TCP for SCADA and industrial automation and can be controlled via HTTP, Telnet, or TCP protocols. The RS-232/485 serial port enables serial-to-Ethernet communication, making it ideal for barcode/RFID readers, security systems, UPS monitoring, and vending machines.
The Box-2-Box mode allows I/O mirroring between two units, enabling remote relay activation and status monitoring over LAN.
Key Features
- Full RS-232/485 serial port with 9-pin support
- 2x Digital Inputs (DI) for dry contacts, switches, or 5-20V DC signals
- 2x Relay Outputs (DO) for high-power switching (230V/16A)
- Modbus/TCP support for SCADA & industrial integration
- Remote power control and automation over LAN
- Box-2-Box mode: Mirror digital inputs/outputs between multiple devices
- Built-in web server for easy configuration and monitoring
- Virtual Serial Port (VSP3) software for remote RS-232 access
- DIN rail, table, and wall mounting options
Technical Specifications
| Feature | Description |
|---|---|
| Digital Inputs | 2 dry contact inputs (5-20V DC) |
| Digital Outputs | 2 relay outputs (230V, 16A max) |
| Serial Ports | 1x RS-232 (9-pin), 1x RS-485 |
| Network Connectivity | Ethernet (10/100 Mbit), HTTP, Telnet, Modbus/TCP |
| Configuration | Web interface, Telnet |
| Power Supply | 12-30V DC (via jack or terminal block) |
| Power Consumption | 250mA |
| Operating Temperature | -5°C to 75°C |
| Storage Temperature | -30°C to 60°C |
| Humidity Range | 5% to 95% RH |
| Dimensions | 141 × 90 × 40 mm |
| Housing & Protection | Plastic, IP40 |
Applications and Usage
- Remote power control (switching 230V loads)
- Automation and industrial control (SCADA, Modbus/TCP)
- Security systems (door access, alarms, motion detection)
- RFID and barcode reader connectivity over LAN
- Remote monitoring of UPS and generators
- Smart building automation (HVAC, lighting, gates)
- Vending machines and kiosks











5 Devices | 1 User | 30 Day Log | 1 Report











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