RS2WLAN - Serial Device Server Modbus Gateway


RS2WLAN - Serial Device Server Modbus Gateway


Serial Device Server Modbus Gateway


3Wire RS2WLAN is an Industrial Grade WiFi/LAN IoT Gateway which connects your Serial and Ethernet devices, such as PLCs, meters and sensors to an IoT platform.

Your SCADA and BMS software will also be able to access the Serial and Ethernet devices from anywhere over WiFi or LAN.

RS2WLAN is able to poll the required data from your devices and send it as MQTT or HTTP Post over the connected WiFi or LAN. You can configure the connected devices thru the serial port, configuring and defining the required data and interval.

RS2WLAN can also operate as Modbus TCP Master, Modbus TCP Slave in Paired Mode or Bridge Mode with the data connection thru direct IP or Virtual COM to any SCADA & BMS system.


  • Links Serial and Ethernet devices to an IEEE 802.11b/g network; simultaneous access over Ethernet & WIFI
  • Optical isolation of 1500V on RS485 / RS422 data lines; 2kV surge protection on Ethernet Port
  • Supports baud rate of 1200bps ~ 115200bps, 5 ~ 9 bits and parity can be “None”, “Odd”, “Even”, “Mark” & “Space”
  • Serial port interface for RS232 / 485 / 422; terminal block for RS485 & RS422 and DB9 for RS232
  • Supports 10/100 Mbps Ethernet
  • Operates in STA Mode to connect to wireless router or AP Mode to connect to WIFI devices (including mobile phone)
  • Power / Link / Active LED indicator
  • Secure data access with WEP, WPA, WPA2
  • Fast roaming for quick automatic switching between access points
  • Upto 256 slaves connected on RS485 / 422 bus
  • Multi-mode operation; TCP Server, TCP Client, UDP Mode, UDP Multicast
  • Modbus TCP Gateway function (converts Modbus RTU to Modbus TCP)
  • Supports 30 TCP clients at TCP Server and 7 destination IP as TCP Client
  • Heartbeat & Keep Alive function ensures a reliable connection
  • Virtual Port operation using 3Wire ComPort Emulator software
  • Automatic discovery and configuration using provided 3Wire Device Management software or Web Browser configuration
  • Wide voltage 9VDC ~48VDC with dual voltage input; Screw Terminal or DC-Jack
  • ​Plug-in screw terminal wiring; accepts AWG12 ~AWG30 wires

General Specs
Interface RS485/422: Terminal; RS232: DB9
Power Supply 5.5mm Plug & 2 Way Plugable Terminal Block
Dimensions 94mm (L) x 65mm (W) x 25mm (H)

Ethernet 10M / 100M, 2kV Surge Protection
WiFi 802.11b/g
Serial RS232 / 485 / 422 x 1: RXD, TXD, GND, CTS, RTS

Serial Parameters
Baud Rate 1200 ~ 115200bp
Data Bits 5 bits ~ 9 bits
Parity None, Odd, Even, Mark, Space 

Configuration 3Wire Device Management Software & WEB Browser
Net Communication Direct TCP/IP, Virtual Serial Port
Mode TCP Server, TCP Client, UDP, UDP Multicast

Power Requirement
9 ~ 48V DC. 80mA@12V : 40mA@24V : 20mA@48V

Operation Temperature -40°C ~ 85°C 
Storage Temperature -45°C ~ 125°C
Humidity 5 ~ 95% RH

Network Analyzer / Bidirectional Energy / Data Logger / Current Transformers / RS485 / 3Wire / Digital Contact / Modbus Communication. 3WIRE-RS2WLAN from Saturn Pyro is the best available in Malaysia. High performance and cost effective Power Meter, can transform ratio for CT and VT. Available in Penang, KL, Selangor, Johor, Sabah, Sarawak & anywhere in Malaysia & Singapore.

Saturn Pyro provides reliable engineering services such Electrical Safety Survey, Power System Studies (Short Circuit, Load Flow & Protection Discrimination on ETAP), Arc Flash Assessment & Labeling, Design Of Earthing & Lightning Protection, Measurement Of Touch & Step potentials, Power Quality Management, Energy Audit and Data Center Performance Assessment. We also provides Electrical Safety Survey such as Inspection of an electrical installation, Identification of risk (electrical hazards), Review of documentation, operations & maintenance procedures, contingency planning, Generation of report in details of risk potentials and plan for mitigation, Closing report post implementationas. Available in Pulau Pinang, Johor, Kuala Lumpur (KL), Selangor and anywhere in Malaysia / Singapore / Bangalore / India / Mumbai.

 Inquiry - RS2WLAN - Serial Device Server Modbus Gateway