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1, 2, 4- Serial port DIN-Rail modbus gateways
Product Overview

The KGW3101, KGW3102, and KGW3204 gateways convert between Modbus TCP and Modbus RTU/ASCII protocols. Each Ethernet port can be accessed by up to 16 TCP master/client devices, or 16 TCP slave/server devices. Each serial port can manage up to 128 serial master/slave nodes.

The KGW3101, KGW3102, and KGW3204 Modbus gateways support both Transparent mode and Agent mode. In Transparent mode, the gateway will bypass and translate Modbus commands between Modbus TCP/RTU/ASCII. In Agent mode, the gateway will actively poll the Modbus slave devices and store data in the Modbus’s memory. The Modbus master can retrieve Modbus slave devices’ data via the gateway’s memory. KGW3101/3102/3204 can be widely applied in all kinds of applications in factory automation and industrial segments.

Key Features

Convert between Modbus TCP and Modbus RTU/ASCII 
1 or 2 Ethernet port and 1, 2, or 4 RS-232/422/485 ports 
Supports both Transparent & Agent mode transmission
16 TCP devices per Ethernet port, Client or Server
128 devices per serial port, Master or Slave
Build-in 2KV serial Isolation protection 
Metal housing with wide temperature rating (-40 to +75℃)
UL61010, Class I Div 2, CE, FCC, RoHS


Technical Specification
Ethernet Interface Protocols: Modbus TCP
Number of ports:
KGW3101/KGW3102: 1
KGW3204: 2
Speed: 10/100 Mbps, Auto MDI/MDIX
Connector: RJ45
Magnetic Isolation Protection: 1.5 kV (built-in)
Serial Interface Protocols: Modbus RTU/ASCII
Number of ports:
KGW3101: 1
KGW3102: 2
KGW3204: 4
Serial Standards: RS-232/422/485, software selectable
Connector: DB9 male
ESD Protection: 15 kV for all signals
Isolation Protection: 2 kV (build-in)
DIP-Switch: Enable/Disable 120Ω matching resistor for RS485
Serial Communication Parameters Data Bits: 7 or 8
Stop Bits: 1 or 2
Parity: None, Even, Odd, Space, Mark
Flow Control: XON/XOFF, RTS/CTS, None
Baudrate: 300bps to 460.8kbps
Security Security Protocols:HTTPS, SSH2
LED System: PWR1, PWR2, Run
Serial port: S1-T/R、S2-T/R、S3-T/R、S4-T/R
Button Reset: Supports "reset to factory default settings"
Power Requirements Input voltage:12 to 48 VDC, recommended 24 VDC
Power plug: 4-pin terminal block
Power Consumption:
KGW3101/3102: 1.8W
KGW3204: 3.2W
Overload protection: Support
Reverse protection: Support
Redundancy protection: Support
Physical Characteristics Housing: Aluminum
KGW3101: 165g
KGW3102: 170g
KGW3204: 320g
KGW3101/KGW3102: 30×115×68 mm(W×H×D)
KGW3204: 54×134×106 mm(W×H×D)
Protection level: IP40
Installation: DIN-rail mounting
Environmental Limits Operating temperature: -40 to 75℃
Storage temperature: -40 to 85℃
Operating humidity: 5 to 95% RH
Quality Assurance Warranty: 5 years
Approvals UL61010, Class I Div 2, CE, FCC, RoHS
IEC 60950-1, EN 60950-1
Industrial Standard EMI:
EN 55032
FCC Part 15 Subpart B Class A
EN 55024
IEC61000-4-2(ESD): ±6kV(contact),±8kV(air)
IEC 61000-4-3(RS): 10V/m (80MHz–2GHz,)
IEC61000-4-4(EFT): Power Port:±2kV;Data Port:±1kV
IEC61000-4-5(Surge): PowerPort: ±1kV/DM, ±2kV/CM; Data Port:±1kV
IEC 61000-4-6(CS): 10V(150KHz-80MHz)
IEC60068-2-32(Free Fall)
Mechanical Drawing

Ordering Information

Available Models

KGW3101-1T1D-L17-L17: 1-port standard Modbus gateway

KGW3102-1T2D-L17-L17: 2-port standard Modbus gateway

KGW3204-2T4D-L17-L17: 4-port standard Modbus gateway