/ IP to Serial Converters
Ethernet to RS232/RS422/RS485 Modbus Gateway Converter
The IP-2535U MOD is a standard Modbus gateway converter that converts Modbus TCP and RTU protocols. It supports baud rates from 300 bps to 115 kbps with 5000V isolation and 15KV surge protection for industrial deployments.
- Converts Modbus TCP and Modbus RTU protocols
- Baud rates from 300 bps to 115 kbps
- 5000V isolation and 15KV surge protection
- 7-pin Phoenix connector for RS232/RS485/RS422 signals
- Suitable for HMI, BMS Automation, PLC, and SCADA applications
Max Resolution
1080p Full HD
Audio Input
Stereo Analogue
Output
Single HDMI
- In-house manufactured
- 24hr response
- 2,000+ clients served
Product Overview
What is the IP-2535U MOD
The IP-2535U MOD is a standard Modbus gateway converter designed to bridge Ethernet-connected networks with RS232, RS422, and RS485 serial interfaces. It converts Modbus TCP protocol traffic to Modbus RTU protocol, allowing modern IP-based systems to communicate directly with older serial-based field devices and equipment.
The device supports RS232 signals via TX, RX, and GND lines. For RS422, it handles the full four-wire differential pair consisting of positive and negative TX and RX signals. For RS485, it supports the two-wire half-duplex A and B signal lines, making it compatible with a wide range of industrial serial devices.
With a baud rate range of 300 bps to 115 kbps, the IP-2535U MOD can interface with both low-speed legacy equipment and faster serial-based devices. The 5000V galvanic isolation protects connected equipment from ground loops and common-mode voltage differences, while the 15KV surge protection shields the unit and downstream devices from transient electrical events common in industrial environments.
Connectivity is provided through a single 7-pin Phoenix connector that carries all RS232, RS485, and RS422 signals. This compact, single-connector design simplifies field wiring in panel-mounted or DIN-rail installations commonly found in industrial control cabinets.
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Key Features
Built for industrial protocol conversion
Modbus TCP to RTU gateway with wide baud rate support, high isolation, and rugged surge protection for critical automation environments.
Modbus TCP and RTU Protocol Conversion
The IP-2535U MOD converts Modbus TCP protocol received over Ethernet to Modbus RTU protocol used by serial-based field devices, enabling seamless integration between IP networks and legacy serial equipment.
- Converts Modbus TCP to Modbus RTU
- Standard Modbus gateway functionality
- Compatible with Modbus-compliant PLCs, HMIs, and SCADA systems
Wide Baud Rate Support
Supports serial communication from 300 bps to 115 kbps, covering both slow legacy field devices and faster modern serial instruments. This wide range ensures compatibility across a broad selection of industrial equipment.
- 300 bps minimum for low-speed legacy devices
- Up to 115 kbps for faster serial communication
- Flexible configuration to match connected equipment requirements
5000V Isolation and 15KV Surge Protection
Galvanic isolation of 5000V protects connected equipment from ground potential differences and common-mode interference. The 15KV surge protection guards against transient voltages that occur in industrial electrical environments.
- 5000V isolation between Ethernet and serial sides
- 15KV surge protection on signal lines
- Protects downstream PLCs, HMIs, and field instruments
Multi-Standard Serial Interface Support
The converter supports RS232 via TX, RX, and GND lines. RS422 is supported through the full four-wire differential pair. RS485 is supported in two-wire half-duplex mode with A and B signal lines, all through a single 7-pin Phoenix connector.
- RS232: TX, RX, GND signals
- RS422: positive and negative TX and RX differential pairs
- RS485: A and B two-wire half-duplex lines
Installation
Connecting the IP-2535U MOD
The IP-2535U MOD connects on one side to an Ethernet network and on the other side to serial field devices using RS232, RS422, or RS485 via a 7-pin Phoenix connector.
01
Ethernet Network Connection
Connect the Ethernet port of the IP-2535U MOD to the local area network or directly to a Modbus TCP master device such as a SCADA server or HMI panel. The unit acts as a Modbus gateway and listens for Modbus TCP requests from connected clients.
02
Serial Device Wiring via Phoenix Connector
Wire the target serial device to the 7-pin Phoenix connector on the unit. Use the appropriate signal lines based on the device interface: TX, RX, and GND for RS232; positive and negative TX and RX pairs for RS422; or A and B lines for RS485. Ensure correct polarity and signal grounding as per the device datasheet.
Where the IP-2535U MOD is used
Designed for environments where Modbus TCP-based networks must communicate with RS232, RS422, or RS485 serial devices in automation, industrial, and building management systems.
HMI Integration
Connect Modbus TCP-capable HMI panels to serial field instruments and controllers. The IP-2535U MOD translates protocol traffic so operators can monitor and control legacy serial devices from modern touchscreen interfaces.
BMS Automation
Integrate building management systems with RS485-based sensors, meters, and actuators. The gateway enables Modbus TCP BMS servers to read data from and send commands to serial-connected building automation devices.
PLC Communication
Enable PLC systems that communicate over Ethernet using Modbus TCP to interface with RS232 or RS485-based peripheral devices such as drives, relays, and measurement instruments that use Modbus RTU.
SCADA Systems
Allow SCADA software platforms running Modbus TCP to acquire data from RTU-compatible field devices. The IP-2535U MOD acts as the gateway layer between the supervisory control network and RS485-based remote terminal units.
Industrial Energy Monitoring
Connect RS485 energy meters and power analysers to Modbus TCP data acquisition systems. The converter allows centralised energy management software to poll serial meters over an IP network using Modbus TCP requests.
Remote Terminal Connectivity
Extend reach of Ethernet-based control systems to legacy RS232 or RS422 remote terminal units in field installations. The IP-2535U MOD enables IP-to-serial bridging across manufacturing floors, substations, and remote equipment rooms.
Full specification sheet
- Protocol
- Serial Communication
- Protection
- Applications
FAQs about the IP-2535U MOD
What protocols does the IP-2535U MOD support?
The IP-2535U MOD supports Modbus TCP and Modbus RTU protocols. It functions as a standard Modbus gateway that converts Modbus TCP requests received over Ethernet into Modbus RTU commands delivered to serial-connected field devices.
What serial interfaces are supported by the converter?
The IP-2535U MOD supports RS232, RS422, and RS485 serial interfaces. RS232 uses TX, RX, and GND signals. RS422 uses a four-wire differential pair with positive and negative TX and RX lines. RS485 uses a two-wire A and B half-duplex connection. All signals are accessible through a single 7-pin Phoenix connector.
What is the baud rate range supported?
The converter supports baud rates from 300 bps to 115 kbps, covering both slow legacy field instruments and faster modern serial devices. The baud rate can be configured to match the requirements of the connected serial equipment.
What level of isolation and surge protection does the IP-2535U MOD provide?
The IP-2535U MOD provides 5000V galvanic isolation between the Ethernet and serial sides of the converter, protecting connected equipment from ground loops and common-mode voltage issues. It also incorporates 15KV surge protection on the signal lines, guarding against transient voltage events common in industrial environments.
What connector is used for serial wiring?
A 7-pin Phoenix connector is used for all serial signal connections. This single connector carries the RS232, RS422, and RS485 signal lines, simplifying installation in panel-mounted and DIN-rail industrial enclosures.
What industries and systems is the IP-2535U MOD intended for?
The IP-2535U MOD is designed for industrial HMI systems, BMS automation, PLC networks, SCADA deployments, and home automation where Modbus TCP-based controllers or software need to communicate with serial RS232, RS422, or RS485 devices using Modbus RTU.
Is the IP-2535U MOD available in a DIN rail mounted variant?
Milestone Electronics offers related products in the IP-2535 series that include DIN rail mounted variants. Contact our team to confirm current variant availability and discuss the most suitable model for your enclosure and installation requirements.
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