GW-2225i Modbus TCP to RTU/ASCII Gateway with 2-port Isolated RS-422/485

The GW-2235i CR bridges Modbus TCP hosts and serial Modbus RTU/ASCII devices over Ethernet, removing the cable length limits of legacy serial networks. It suits SCADA and HMI systems that need to reach serial field devices without native Ethernet capability.Each serial port accepts up to 32 TCP masters, and a read-cache stores previous requests and responses so repeated queries to the same slave are answered immediately. The two Ethernet ports allow daisy-chaining, and the unit can be powered over IEEE 802.3af Class 1 PoE or from a DC terminal block.Isolation is provided on the serial side, with 3000 VDC signal isolation on the RS-422/485 ports. Configuration is handled through the built-in web server, which supports static IP or DHCP addressing and serial port settings. The unit is CE, UKCA, FCC, RoHS and WEEE listed.ApplicationsFactory, building and home automationRemote diagnosis and managementSolar monitoring

GW-2215i CR is a DIN-rail Modbus gateway that lets a Modbus TCP host reach serial Modbus RTU or ASCII devices across an Ethernet network, removing the cable length limits of legacy serial links. It can act as master or slave on both the TCP/UDP and the RTU/ASCII side, and it supports up to 32 TCP masters per serial port.The built-in read cache stores recent requests and responses in the module's memory. When several SCADA or HMI masters poll the same slave, the cached reply is returned immediately, which reduces traffic on the serial bus and shortens TCP response times. Two Ethernet ports allow daisy-chaining, and the unit can be set to a static IP or DHCP through its web interface.Power can come from a PoE switch (IEEE 802.3af, Class 1) or from a +12 ~ 48 VDC terminal block. The single RS-422/485 port is isolated, with 3000 VDC signal isolation, and the module operates from -25 ~ +75 °C. The ordering code GW-2215i CR is the RoHS-compliant variant listed in this shop.ApplicationsFactory automationBuilding and home automationRemote diagnosis and managementSolar monitoring

The GW-2222i is a Modbus TCP to RTU/ASCII gateway for connecting a Modbus TCP host to serial Modbus RTU or ASCII devices over Ethernet. It removes the cable length restrictions of legacy serial links, so existing serial instruments can be integrated into networked SCADA and supervisory systems without adding Ethernet capability to each device.Two Ethernet ports allow daisy-chain wiring, which simplifies device placement and cuts switch infrastructure. The unit can also run in pair-connection, serial-bridge or serial-tunnel modes, routing data over TCP/IP between two serial Modbus devices. Power can come from PoE (IEEE 802.3af, Class 1) or a DC terminal block supplying +12 ~ 48 VDC.A read-cache stores previous requests and responses, so repeated queries from multiple masters are answered immediately. This reduces load on the serial ports and improves response times and overall system stability. Configuration is handled through the built-in web server, which supports static IP or DHCP addressing.ApplicationsFactory automationBuilding and home automationRemote diagnosis and managementSolar monitoring

The GW-2212i bridges Modbus TCP hosts and serial Modbus RTU/ASCII devices, so legacy serial equipment can be reached over an Ethernet network without the cable length limits of a direct serial connection. It supports Modbus TCP/UDP and Modbus RTU/ASCII in both master and slave roles, with up to 32 TCP masters per serial port.Beyond protocol conversion, the unit can run as a serial bridge, serial tunnel or pair-connection, routing data over TCP/IP between two serial Modbus devices. A read-cache stores previous requests and responses so repeated polls to the same slave are answered immediately, reducing load on the serial port and improving response times. Two Ethernet ports allow daisy-chaining, and the module can be powered over PoE (IEEE 802.3af, Class 1) or from a DC terminal block.The GW-2212i is configured through its built-in web server, which supports static IP or DHCP addressing and the serial port settings. A dual watchdog (CPU and host) is provided to keep the module running and recover from firmware faults or loss of communication with the host. It is DIN-rail mounted and carries RoHS compliance.ApplicationsFactory automationBuilding and home automationRemote diagnosis and managementSolar monitoring