BENTLY NEVADA 125712-01 3500/32M 4-Channel Relay Module

 

BENTLY NEVADA 125712-01 3500/32M 4-Channel Relay Module belongs to the relay output module of the 3500 Machinery Protection System. It is mainly used for alarm output, interlock control, and external shutdown logic control in the mechanical protection system. This module adopts a full-height design and can be installed in the designated slot of the 3500 Rack. It is used in conjunction with the 3500 series vibration monitoring module, position monitoring module, and speed monitoring module to achieve the linkage control between the equipment operation status and alarm logic.

 

For the BENTLY NEVADA 125712-01 3500/32M 4-Channel Relay Module, before delivery, we will conduct a comprehensive functional verification based on the 3500 Rack application environment, including verification of relay output logic, Alarm Drive Logic response tests, and channel status checks, to ensure that the module can directly participate in the alarm and interlock control link after being installed in the on-site 3500 Machinery Protection System.

 

The core function of the 3500/32M 4-Channel Relay Module is to convert the alarm and status signals from the monitoring module into relay contact outputs that can be used for external control systems. It is employed for alarm indication, interlock control, and triggering of equipment shutdown logic.

 Relay Working Principle

Each relay output is an independent control channel, which is driven and controlled by the Alarm Drive Logic within the 3500 system. The logical input sources can come from:
Single monitoring channel (such as vibration over-limit)
Multi-channel combined signal
System status signal (Not OK)
Logical operation result (AND / OR)
The relay body is of an electromagnetic mechanical contact structure (SPDT Form C), supporting both normally open (NO) and normally closed (NC) output forms. It can be directly connected to PLC or DCS input modules and is used for the linkage of industrial control systems.

 Alarm Interlock Logic

In the 3500 system, the relay output is typically used to implement alarm hierarchical interlocking, for example:
Alert Level → Local alarm indication (sound and light alarm device)
Danger Level → Shutdown signal output
Not OK Status → System abnormal interlock
Multi-channel Voting → Trigger protection action after multiple-point confirmation

Each relay channel can be independently configured through software, and it supports:
AND logic (all conditions must be met simultaneously)
OR logic (any one condition triggers)
Time Delay (delayed action)
Voting Logic (voting logic, used for protection of critical equipment)

 Trip Output Function

In critical industrial equipment, the 3500/32M Relay Module is often used as the final shutdown execution unit. When the system detects a serious anomaly, such as:
Vibration exceeds the Danger threshold
Axis displacement exceeds the limit
Rotational speed is abnormal or exceeds the speed limit
Monitoring module enters the "Not OK" state

The system will trigger the relay output through the Alarm Drive Logic, generating a dry contact signal (Dry Contact), which is used to drive:
Emergency Shutdown System (ESD)
Turbine Trip System
Compressor Shutdown Valve
External PLC Interlock Input

 Output Channel Configuration

This module offers 4 independent relay outputs. Each output can be independently configured with different control logic, enabling a multi-level device protection structure, such as:
Channel 1: Vibration Alarm Output
Channel 2: Speed Trip Output
Channel 3: System Not OK Output
Channel 4: Combined Voting Shutdown Output

When purchasing the 3500/32M series modules in practice, it is recommended to confirm the following information in advance to ensure compatibility with the existing system:
3500 Rack model and slot configuration
Whether it needs to be used in conjunction with 3500/40M, 3500/42M, or 3500/25
PLC/DCS interface logic (Alarm vs Trip signal)
Relay output load type (AC/DC switching requirement)
Whether it is necessary to replace the old version of the  relay module
Is there any voting logic or shutdown logic configuration on-site

In terms of delivery support, we can provide technical documents and logistics services that are compatible with the procurement process of industrial projects, including:

 Datasheet & wiring reference

 Certificate of Conformity (CoC)

 Test report before shipment

 Serial number and photo verification

 Export packing suitable for air & sea freight

 Global express delivery (DHL / FedEx / UPS)

In practical applications, the 3500/32M Relay Module is usually used as the execution interface between the monitoring system and the external control system. Once vibration, shaft displacement, or speed signals trigger the alarm conditions, the relay output will directly participate in the equipment protection logic.

Therefore, in industrial settings, procurement decisions not only focus on the module itself, but also need to pay particular attention to:
Can the Alarm Drive Logic be executed correctly?
Is it consistent with the existing 3500 rack configuration?
Does it support on-site shutdown chain integration?