BENTLY NEVADA 125720-01 3500/32M 4-Channel Relay I/O Module

BENTLY NEVADA 125720-01 is a 4-channel relay I/O module applied to the 3500/32M mechanical protection system. It is used for alarm output, interlock control, shutdown logic, and external equipment signal switching in industrial monitoring systems. This module is widely used in steam turbine monitoring systems, compressor protection systems, power plant control cabinets, and petrochemical rotating equipment protection systems.

As the relay output module in the Bently Nevada 3500 series, 125720-01 supports logical configuration through the 3500 Rack Configuration Software. Each relay channel can be programmed independently, and AND/OR voting logic can be configured according to on-site process requirements for different levels of alarm and interlock outputs.

After the customer confirms the order, the following can be provided:
Product real photo
Nameplate photo
Test video
Packaging photo

 Function Introduction

The module can receive status information from the following monitoring modules:

Vibration monitoring module
Keyphasor module
Temperature monitoring module
Speed monitoring module
Mechanical protection monitoring module

The relay output can be set according to different working conditions:

Alert: Alarm output
Danger: Emergency shutdown output
Not OK: Status output
Channel interlock output
Voting logic output
System-level alarm output

 Features of the 4-Channel Relay I/O Module

The module is internally integrated with 4 independent relay channels, and each channel can be configured with different alarm logic. Field engineers can set the output actions according to the equipment process requirements.

125720-01 Supports multi-channel alarm logic combinations, which can be used for turbine protection, compressor interlock, and critical equipment shutdown logic.

125720-01 adopts the standard 3500 series rack installation structure and can be directly installed in the designated slot without the need for additional conversion interfaces.

In the Bently Nevada 3500 series, Programmable Alarm Logic is one of the important functions of the 3500/32M relay module. 125720-01 supports independent logical configuration of the four-channel relay outputs through the 3500 Rack Configuration Software. Each channel can set different trigger conditions, such as Alert, Danger, and Not O, K for different states, and supports AND/OR voting logic combinations. This means that field engineers can associate monitoring signals such as vibration, speed, displacement, or temperature with shutdown circuits, interlock systems, audible and visual alarms, and PLC/DCS control systems based on the equipment operation logic.

For users, the module supporting Programmable Alarm Logic can reduce the need for additional intermediate relays and external logic control units during later project implementation. No additional hardware needs to be added on-site, and the alarm linkage logic settings can be completed within the 3500 system. This facilitates the later system expansion and maintenance. At the same time, the 4 Independent Channels structure allows different devices to correspond to different alarm output logic. In monitoring projects of steam turbines, compressors, generators, and large fans, it is easier to match with the existing control systems.