ekinex

Gateway RS485 to Ethernet POE

Code: EK-BU1-485-TCP

New
Gateway RS485 to Ethernet POE

Description

Bidirectional gateway for integrating serial Modbus and IP networks. The Ekinex EK-BU1-485-TCP interface is a modular device designed to enable bidirectional communication between equipment equipped with a Modbus RS-485 port and the IP data network. Thanks to its versatility, the gateway allows serial Modbus devices to be easily integrated into Ethernet network infrastructures, ensuring a reliable and stable connection.

The interface is designed for mounting on a 35 mm DIN rail, suitable for electrical panels or distribution cabinets. Power can be supplied in two ways: via PoE (Power over Ethernet) directly from the LAN cable, or via an auxiliary DC power supply (6–36 VDC).

The device features:

  • an RS-485 serial port for connecting Modbus devices
  • an RJ45 connector for interfacing with the IP data network

Operation

The EK-BU1-485-TCP gateway allows bidirectional conversion of the Modbus protocol between an RS-485 serial line and an Ethernet/IP network. Designed as a universal device, it can operate in conjunction with any equipment that acts as a Modbus master, ensuring maximum flexibility of integration into automation and supervision systems.

In the Delégo environment, the gateway allows the number of RS-485 serial lines managed by the system to be expanded. The Delégo Server has a native RS-485 port for direct connection of Modbus devices; if communication with devices on multiple serial lines is required, one or more EK-BU1-485-TCP gateways can be used, thus expanding the system's capabilities in a simple and scalable manner.

Technical Data

Power Supply

Supply Voltage6-36 VDC or PoE port
IsolationIsolation between power supply and signal

Environmental Conditions

Operating Temperature-40 °C to +85 °C
Storage Temperature-40 °C to +85 °C
Relative Humidity< 95% non-condensing

Communication Interfaces

Serial Port1 x Isolated RS-485
Ethernet Port1 x RJ45 PoE port, supports IEEE 802.3af standard

RS-485 Parameters

Baud Rate1200 ~ 115200 bps
Parity BitNone, odd parity, even parity, mark, space
Data Bit5 ~ 9 bits
Flow ControlNo flow control

Software

ConfigurationWeb browser (integrated web server)
ProtocolsEthernet, IP, TCP, UDP, HTTP, ARP, ICMP, DHCP, DNS

Functions / Features

Plastic housing
Designed for mounting on a 35 mm profile rail (according to EN 60715)
IP20 protection rating (according to EN 60529)
Safety class II
Weight 50 g
Modular device 2 UM (1 UM = 18 mm)
Dimensions (W x H x D): 36 x 87 x 59 mm

Configuration and Commissioning

The configuration and commissioning of the EK-BU1-485-TCP gateway must be carried out by accessing the web server integrated in the device. These activities must be carried out in accordance with the system design and performed by a professional. For further information, please refer to the technical documentation.

Technical Documentation

Datasheet

STEKBU1485TCP_EN• v. 1.0(13/11/2025)• PDF• 611,9 KB

Instructions

FISPEKBU1485TCPIEX0• v. 1.0(13/11/2025)• PDF• 594,9 KB