PT-E - Modbus TCP Gateway

The PT-E GATEWAY is an Ethernet to serial converter and connects the PROMUX modules to a 10/100 Base-TX Ethernet network.

The PT-E GATEWAY includes a web server which enables access to internal parameters for configuration. This allows configuration of IP address, default gateway IP address and subnet mask. The web server can be accessed by most web browsers.

The PT-E GATEWAY is factory programmed with a default IP address of This address must be changed before the converter is added to an existing network.

The web page address for viewing the setup parameters is The web page address for configuring the converter is

The master device which is polling the modules must be configured with the IP address of the PT-E GATEWAY and with the modbus ID of the PROMUX modules. As each PROMUX communications bus is separate, it is possible to have repeated Modbus ID’s on the PROMUX modules provided they are attached to a different PT-E GATEWAY. The IP address differentiates between the different PROMUX systems. Consequently, many hundreds of PROMUX modules may be added to an Ethernet network.

The PT-E GATEWAY is a Modbus gateway and the client must be configured to use Port 502. This is a reserved port number for Modbus TCP applications and informs the PT-E GATEWAY that it must implement the protocol conversion from Modbus TCP on the Ethernet network to Modbus RTU on the PROMUX serial communications bus.

PT-E - Modbus TCP Gateway

Ethernet protocol

IEEE 802.3

Ethernet Connector


RJ45 ports (shielded)

10 BaseT / 100 BaseTX

Order Codes

  • PT-E - Modbus TCP Gateway Module

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Procon Electronics