Bently Nevada 125736-01 Communication Gateway I/O Module | Serial Modbus Interface

Product Description

Overview

The Bently Nevada 125736-01 is a dedicated Communication Gateway I/O Module designed to interface the 3500/92 system with external control and automation systems. It provides high-speed, configurable Modbus communication over serial (RS232/RS422/RS485) and Ethernet, enabling seamless integration of all monitored rack values into Distributed Control Systems (DCS) or PLCs.

Key Features

• Supports Ethernet TCP/IP and serial RS232/RS422/RS485 connections

• Configurable Modbus registers for precise mapping of rack data

• High-speed data acquisition with update times under 1 second for the full rack

• Integrated OK and TX/RX LEDs for status and communication diagnostics

• Rugged design for industrial environments with wide operating and storage temperature ranges

• Directly interfaces with 3500/92 Communication Gateway Module

Technical Specifications

Performance Characteristics

• Collects real-time data from all modules in the rack, including vibration levels, temperatures, and alarm statuses

• Configurable Modbus registers replicate the primary value functionality of legacy modules

• Supports continuous serial communication for both short and long-distance connections

• Compatible with 3500 Rack Configuration and Data Acquisition Software for remote monitoring

Diagnostic Indicators

• OK LED: Confirms module power and operational status

• TX/RX LED: Signals active communication with other modules in the 3500 rack

Applications

Ideal for transmitting critical machinery monitoring data to DCS or PLC systems in turbines, compressors, and other rotating equipment. Provides a reliable interface when Ethernet or direct serial communication is required for redundancy or security.

FAQ

What is the purpose of 125736-01?
It is a Communication Gateway I/O Module enabling data exchange between the 3500/92 rack and external control systems.

What does the OK LED indicate?
The OK LED confirms the module is powered and functioning properly.

What is the TX/RX LED for?
The TX/RX LED shows active communication between the module and other rack components.

Which protocols are supported?
Modbus RTU via serial and BNC Host Protocol for Ethernet communication with configuration software.

Can it interface with Ethernet and serial systems simultaneously?
Yes, it supports both TCP/IP and RS232/RS422/RS485 serial connections concurrently.