Deskripsi
3Wire Industrial Ethernet Serial Device Server
RS2LAN Serial Device Server & Modbus Gateway
3Wire RS2LAN is an industrial serial device server with integrated Modbus gateway functionality. It enables RS232, RS485 and RS422 serial devices to be accessed, controlled and monitored over TCP/IP or UDP/IP Ethernet networks.
RS2LAN is suitable for connecting PLCs, digital power meters, alarm sensors, PTZ camera controllers, Modbus RTU devices and other serial equipment to IP-based systems such as SCADA, BMS, EMS, AMR, energy monitoring platforms and IoTWatt 4.0.
10/100 Mbps Ethernet
RS232 / RS485 / RS422
Modbus RTU to TCP
TCP Server / Client
UDP / Multicast
Virtual COM
IoTWatt 4.0 Ready
Product Overview
Many industrial devices still communicate through serial ports, while modern control and monitoring systems rely on Ethernet and TCP/IP networks. RS2LAN bridges this gap by converting serial communication into network-accessible data.
The unit can operate in Modbus TCP Master, Modbus TCP Slave, Paired Mode and Bridge Mode. It also supports direct IP access and Virtual COM operation, making it suitable for both new Ethernet-based systems and legacy software that still expects a local serial port.
Positioning: RS2LAN is an industrial Ethernet serial device server and Modbus gateway for connecting RS232 / RS485 / RS422 devices to SCADA, BMS, EMS, AMR and IoT systems.
Why RS2LAN Matters
RS2LAN protects the value of existing serial devices while allowing them to be connected into modern Ethernet and cloud monitoring systems.
- Serial retrofit
- Modbus gateway
- SCADA access
- BMS / EMS integration
- Virtual COM support
- Remote meter reading
- IoTWatt gateway
Typical Communication Flow
RS2LAN connects serial field devices to an Ethernet network, allowing host PCs, PLCs, SCADA, BMS or IoTWatt systems to access remote devices through TCP/IP, UDP/IP, Modbus TCP or Virtual COM.
1
Field Device
Meter, PLC, relay, sensor or controller.
2
RS232 / RS485
Serial communication layer.
3
RS2LAN Gateway
Serial-to-Ethernet conversion.
4
Ethernet / TCP-IP
LAN, WAN or VPN access.
5
SCADA / IoTWatt
Monitoring, dashboards and reports.
Key Features at a Glance
Serial-to-Ethernet Access
Allows RS232, RS485 and RS422 devices to be accessed over Ethernet using TCP/IP or UDP/IP.
Modbus TCP Gateway
Converts Modbus RTU to Modbus TCP for PLC, SCADA, BMS, EMS and monitoring systems.
Industrial Protection
Includes serial isolation and Ethernet surge protection for industrial communication environments.
Multi-Mode Operation
Supports TCP Server, TCP Client, UDP and UDP Multicast communication modes.
Virtual COM Support
Supports Virtual Port operation using 3Wire ComPort Emulator for legacy serial software.
Large RS485 Network
Supports up to 256 slave devices on RS485 / RS422 bus depending on network design.
Multiple TCP Clients
Supports up to 30 TCP clients in TCP Server mode and up to 7 destination IP addresses in TCP Client mode.
Reliable Connection
Heartbeat and keep-alive functions help maintain stable communication.
Easy Configuration
Automatic discovery and setup using 3Wire Device Management Software or web browser.
Supported Operating Modes
| Mode |
Description |
Typical Use |
| Modbus TCP Server to Serial Device Mode |
Allows Modbus TCP masters to access serial Modbus RTU devices through RS2LAN. |
PLC, SCADA or host PC reading RS485 meters, RS232 devices and RS422 devices. |
| Modbus TCP Client to Serial Master Mode |
Allows serial masters to communicate with Modbus TCP slaves through RS2LAN. |
HMI master accessing Modbus TCP PLCs, inverters or digital power meters. |
| Pair Bridge Mode |
Creates a client / server bridge between two RS2LAN units over Ethernet or Internet. |
Replacing a long serial cable between a host PC and remote serial devices. |
| Bridge Mode |
Provides remote host access to local serial devices through an IP network. |
Remote SCADA, BMS or maintenance PC accessing site equipment. |
| Virtual COM Mode |
Maps the remote serial port as a virtual local COM port on a host PC. |
Legacy software that only supports COM port communication. |
Technical Specifications Summary
| Category |
Specification |
| Product Type |
Industrial serial device server and Modbus gateway. |
| Serial Interface |
RS485 / RS422 terminal and RS232 DB9. |
| Ethernet |
10M / 100M Ethernet with 2 kV surge protection. |
| Serial Baud Rate |
1200 bps to 115200 bps. |
| Data Bits / Parity |
5 to 9 data bits; None, Odd, Even, Mark or Space parity. |
| Flow Control |
RTS / CTS, XON / XOFF or None. |
| Network Protocols |
Ethernet, IP, TCP, UDP, HTTP, ARP, ICMP, DHCP and DNS. |
| Communication Modes |
TCP Server, TCP Client, UDP and UDP Multicast. |
| Modbus Function |
Modbus TCP gateway function, converting Modbus RTU to Modbus TCP. |
| TCP Connections |
Supports up to 30 TCP clients in TCP Server mode and 7 destination IP addresses in TCP Client mode. |
| Device Capacity |
Up to 256 slaves connected on RS485 / RS422 bus, depending on design and device loading. |
| Isolation / Protection |
1500 V optical isolation on RS485 / RS422 data lines and 2 kV surge protection on Ethernet port. |
| Configuration |
3Wire Device Management Software and web browser configuration. |
| Power Supply |
9 48 VDC with dual voltage input, screw terminal or DC jack. |
| Typical Current |
80 mA at 12 VDC; 40 mA at 24 VDC; 20 mA at 48 VDC. |
| Dimensions |
94 mm L x 65 mm W x 25 mm H. |
| Operating Temperature |
-40°C to +85°C. |
| Humidity |
5% to 95% RH. |
Applications and Best-Fit Sites
- Industrial automation
- Automatic meter reading
- Energy management
- SCADA integration
- BMS integration
- EMS integration
- Serial retrofit projects
- PLC access
- Power meter networks
- Protection relays
- PTZ camera control
- IoTWatt 4.0 projects
Why RS2LAN for Industrial Integration?
Retrofit Friendly
Converts existing serial field device communication into Ethernet-accessible data.
Modbus RTU to TCP
Supports integration into modern PLC, SCADA, BMS and EMS systems.
Remote Serial Access
Allows remote access to serial devices through direct TCP/IP or Virtual COM.
Legacy Software Support
Supports older software through 3Wire ComPort Emulator.
Industrial Hardware Design
Isolation, surge protection and wide temperature range support factory environments.
Energy Monitoring Ready
Suitable for retrofit energy monitoring and IoTWatt 4.0 data collection projects.
Integration with IoTWatt 4.0
RS2LAN can be used in IoTWatt 4.0 projects where RS485 Modbus meters or other serial devices are connected to an Ethernet network. It enables data collection from power meters, energy meters, sensors and controllers for dashboards, alarms, reports and digital energy audit workflows.
- Modbus RTU meters
- Ethernet gateway access
- Energy dashboards
- Remote meter reading
- Equipment monitoring
- SCADA / BMS bridge
- Digital energy audit data
- EECA reporting support
- IoTWatt analytics
Recommended Deployment Checklist
- Confirm RS232 / RS485 / RS422
- Confirm baud rate
- Confirm data bits and parity
- Confirm stop bits
- Confirm flow control
- Confirm Modbus slave IDs
- Confirm register maps
- Confirm operating mode
- Confirm IP address and subnet
- Confirm port numbers
- Confirm firewall rules
- Confirm RS485 termination
- Confirm grounding and surge protection
- Test communication stability
RS2LAN Supply, Configuration and IoTWatt 4.0 Integration
Saturn Pyro supports 3Wire RS2LAN gateways for serial-to-Ethernet conversion, Modbus RTU-to-Modbus TCP integration, SCADA / BMS / EMS connectivity, AMR, remote meter reading, industrial automation, energy monitoring and IoTWatt 4.0 projects in Malaysia.
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