Bently Nevada 125712-01 4-Channel Relay Module

Description

The 125712-01 is a full-height spare component designed to provide four independent relay outputs within the 3500 Series Machinery Protection System. This module functions by executing highly customizable voting logic directly driven by machine alerts and danger levels across the system enclosure. Each output terminal incorporates specialized Alarm Drive Logic, which can be custom configured with complex AND or OR Boolean expressions using the 3500 Rack Configuration Software to manage specific automated trip signals. It operates reliably when located to the right of the main Rack Interface Module, delivering discrete contact outputs for field control links, emergency stop systems, or external industrial annunciators.

Features

• Four fully programmable, independent relay outputs supporting complex localized system voting logic.
• Configurable Alarm Drive Logic utilizing combinational AND/OR gate selections for flexible machine-state actions.
• Multi-channel compatibility accepting alert and danger alarm inputs from any active monitor card in the local rack.
• Front-panel visual diagnostics including dedicated LEDs for Module OK, active TX/RX communications, and individual relay state indicators.
• High-integrity epoxy-sealed relay hardware utilizing pairs of single-pole double-throw (SPDT) relays in a unified double-pole double-throw (DPDT) physical arrangement.
• Hardware switch-selectable functionality for setting channels to either Normally Energized (NE) or Normally De-energized (NDE) operation.

Applications

• Mechanical trip systems and emergency shutdown integration.
• Automated industrial voting logic and alarming systems for large rotating assets.
• Critical turbomachinery and industrial compressor protective interlocking networks.

Ordering Information

Technical Specifications

Connections/Interfaces

Installation Guidelines

• Slot Allocation: Position the module in any available full-height slot directly to the right of the 3500 Rack Interface Module.
• Relay Mode Configuration: Before commissioning, configure individual channel hardware switches located on the module to specify either Normally De-energized (NDE) or Normally Energized (NE) operation based on the field device type.
• Software Configuration: Use the 3500 Rack Configuration Software to map specific combinations of alert or danger alarms across monitor channels into the module's localized Alarm Drive Logic.

Compliance and Certifications

• EMC Emissions: EN 55011 Class A (Radiated and Conducted Emissions).
• EMC Immunity: IEC61000-6-2, EN 61000-4-2 (Electrostatic Discharge Criteria B), ENV 50140 (Radiated Susceptibility Criteria A), ENV 50141 (Conducted Susceptibility Criteria A), EN 61000-4-4 (Electrical Fast Transient Criteria B), EN 61000-4-5 (Surge Capability Criteria B), 61000-4-8 (Magnetic Field Criteria A), EN 61000-4-11 (Voltage Dip Criteria B), ENV 50204 (Radio Telephone Criteria B).
• Safety Requirements: EN 61010-1 Low Voltage Directives.
• Hazardous Area Approvals: CSA/NRTL/C; Class I, Div 2, Groups A, B, C, D; T4 @ Ta = -20 degC to +65 condition. Certification Number: CSA 150268-1002151 (LR 26744).