Bently Nevada

Bently Nevada 125720-01 3500/32 4-Channel Relay Output Module

SKU 125720-01

In stock
  • 12-month warranty
  • Free returns within 30 days
  • Manufacturer: Bently Nevada

  • Product No.: 125720-01

  • Country of origin:United States

  • Product Type: Relay Output Modules

  • Barcode: 8537101190

  • Payment: T/T, Western Union

  • Weight: 400g

  • Dimensions: 241 mm x 24.4 mm x 99.1 mm (H x W x D)

  • Shipping port: Xiamen

  • Warranty: 12 months

Description

The Bently Nevada 125720-01 is a spare 4-channel relay I/O module designed for use within the 3500/32 4-Channel Relay Module system. Installed in a full-height rear slot of a 3500 rack, it provides the physical terminal interfaces to route switching outputs to external control or machinery protection equipment.

The 125720-01 I/O module operates in conjunction with the front 3500/32 relay main module. Each of its four channels uses two single-pole, double-throw (SPDT) relays wired in a double-pole, double-throw (DPDT) configuration. Individual channels can be configured independently for Normally De-energized or Normally Energized operations and include onboard switches to select relay modes alongside standard 250 Vrms arc suppressors and epoxy environmental sealing.

Features

  • Epoxy-Sealed Relay Circuits: Constructed with epoxy sealing to protect switching components from environmental exposure.
  • Integrated Arc Suppression: Standard built-in 250 Vrms arc suppressors across relay contacts.
  • Switch-Selectable Operations: Individual channel switches allow configuration for Normally De-energized or Normally Energized modes.
  • DPDT Relay Configuration: Employs two SPDT relays per channel combined in a double-pole, double-throw setup.

Applications

  • 3500 Series Machinery Protection Systems requiring discrete relay output interfaces
  • Automated machinery trip, alert logic actuation, and external control system interfacing
  • Industrial rotating equipment monitoring systems

Technical Specifications

Parameter Specification
Manufacturer Bently Nevada
Country of Origin U.S.A
Module Type Spare 4-Channel Relay I/O Module
Relay Type Two SPDT relays connected in a DPDT configuration per channel
Environmental Sealing Epoxy-sealed
Arc Suppressor 250 Vrms, installed as standard
Contact Life 100,000 cycles @ 5 A, 24 Vdc or 120 Vac
Operation Modes Switch selectable per channel for Normally De-energized or Normally Energized
Max Switched Power (Resistive) DC: 120 W; AC: 600 VA
Min Switched Current 10 mA @ 5 Vdc
Max Switched Current 5 A
Max Switched Voltage DC: 30 Vdc; AC: 250 Vac
Operating Temperature -30 degC to +65 degC (-22 degF to +150 degF)
Storage Temperature -40 degC to +85 degC (-40 degF to +185 degF)
Humidity 95%, non-condensing
Dimensions (H x W x D) 241 mm x 24.4 mm x 99.1 mm (9.50 in x 0.96 in x 3.90 in)
Weight 0.4 kg (1.0 lb.)
Rack Space Requirements 1 full-height rear slot

Installation Guidelines

  • Slot Placement: Mount the 125720-01 into a full-height rear slot directly behind its corresponding 3500/32 front relay module.
  • Terminal Connections: Connect wiring from external alarm and shutdown devices to the designated terminal connectors on the rear faceplate.
  • Mode Selection: Set the relay mode switches on the module faceplate to Normally De-energized (NDE) or Normally Energized (NE) as required by the system control scheme.
  • ESD Protection: Use a single-use grounding wrist strap (p/n 04425545) or equivalent protection when handling or installing the card.

Compliance and Certifications

Certification / Standard Detail
Safety Requirements EN 61010-1
EMC Directives IEC 61000-6-4 (Radiated/Conducted EN 55011 Class A), IEC 61000-6-2 (EN 61000-4-2, ENV 50140, ENV 50141, EN 61000-4-4, EN 61000-4-5, EN 61000-4-8, EN 61000-4-11, ENV 50204)
Hazardous Area Approvals CSA/NRTL/C (Class I, Div 2, Groups A, B, C, D; T4 @ Ta = -20 degC to +65 degC)

FAQ

What is the Bently Nevada 125720-01 used for?

The Bently Nevada 125720-01 is a spare 4-channel relay I/O module used to connect external alarm and control devices to the 3500/32 relay system.

Which system does the 125720-01 module belong to?

The module belongs to the Bently Nevada 3500 Series Machinery Protection System and serves as the rear I/O component for the 3500/32 4-Channel Relay Module.

What are the contact electrical ratings for the relay outputs?

The relay outputs handle maximum switched currents up to 5 A, with voltage limits of 30 Vdc or 250 Vac, and maximum resistive loads of 120 W DC or 600 VA AC.

How are the operation modes configured on the module?

Each channel is individually selectable for Normally De-energized or Normally Energized operation via switches located on the module.

View all FAQs →

Product Documentation

Technical Datasheet (PDF) Complete specifications and technical drawings.

Technical Datasheet

Bently Nevada 125720-01 3500/32 4-Channel Relay Output Module

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Shipping & Returns

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  • 12-Month Warranty: Every industrial component is backed by our technical warranty.
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Global Express Shipping

  • Standard Delivery: 4-6 Business Days via DHL, FedEx, and UPS.
  • Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
  • Worldwide Coverage: Serving over 150 countries, including rapid delivery to Saudi Arabia and UAE.

Returns & Warranty

  • 30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
  • 12-Month Warranty: Every industrial component is backed by our professional technical warranty.

Orders are processed and delivered Monday-Friday (excluding public holidays).


For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .

TECHNICAL SPECIFICATIONS

Color pattern
Greyish White
Country of origin
United States
Power source
DC Power

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