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Bently Nevada

Bently Nevada 79748-01 Relay Output Record Terminals
SKU: 79748-01
In stock: 12
Description

Bently Nevada 79748-01 Relay Output Record Terminals

The Bently Nevada 79748-01, also cataloged as the 79748 Relay Output Record Terminals, operates as a dedicated hardware component for alarm relay termination, shutdown circuit interfacing, and record output distribution within Bently Nevada machinery monitoring systems. The module provides physical electrical termination between monitor outputs and external control systems while supporting dry-contact alarm and trip signal transmission.

Hardware Specifications

Parameter Specification
Model 79748-01
Brand Bently Nevada
Origin United States
Product Type Relay Output Record Terminal Module
System Compatibility Bently Nevada 3300 Series monitoring systems
Application Compatibility Selected 3500 Series applications
Function Relay output termination and record interface
Relay Logic Normally Open (NO) and Normally Closed (NC) dry-contact configurations
Channel Capacity Up to 6 monitoring channels
Mounting Style Backplane slot-integrated terminal board
Termination Type Screw-type terminals or plug-in terminal connections
Power Supply Powered from system rack backplane
Operating Temp -35 deg C to +65 deg C
Power Consumption Backplane supplied, value not specified

Cross-Talk Suppression and Relay Signal Transfer

The 79748-01 module forms the interface between machinery protection monitoring logic and external control systems. Alarm, alert, and shutdown commands generated by the monitoring rack are routed through dry-contact relay paths for connection to PLC, DCS, annunciation, or trip systems.

Proper terminal segregation and signal routing help reduce electrical coupling between adjacent circuits. The terminal interface incorporates filtering and isolation features intended to minimize electromagnetic interference and prevent unwanted relay activation resulting from transient noise conditions.

Frequently Asked Questions

Q: Does the module generate alarm logic internally?
A: No. Alarm evaluation is performed by the associated monitoring modules. The 79748-01 provides the physical relay termination interface for external systems.

Q: What relay contact configurations are supported?
A: The module supports dry-contact output arrangements using Normally Open and Normally Closed relay states.

Q: Can the module be connected directly to a PLC or DCS input?
A: Yes. The relay output terminals are commonly used to transfer alert, alarm, and trip status signals to PLC and DCS digital input channels.

Field Installation Guidelines

  • Install the module in the designated rack location.

  • Verify terminal numbering before field wiring.

  • Separate relay circuits from low-level transducer wiring.

  • Tighten terminal connections to specified torque values.

  • Confirm NO and NC contact assignments before energization.

  • Test alarm and trip signal continuity during commissioning.