Bently Nevada 125720-02
Bently Nevada 125720-02
Bently Nevada 125720-02
1 / 3

Bently Nevada

Bently Nevada 125720-02 3500/32M 4-Channel Relay Output Module

SKU 125720-02

Disponibile
  • 12-month warranty
  • Free returns within 30 days
  • Manufacturer: Bently Nevada
  • Product No.: 125720-02
  • Origin United States
  • Product Type: Relay Output Module
  • Barcode: 8537101190
  • Payment: T/T, Western Union
  • Weight: 0.4 kg
  • Dimensions: 24.1 x 2.44 x 9.91 cm
  • Shipping port: Xiamen
  • Warranty: 12 months

Tags

3500/32M Relay Output Modules

Product Documentation

Technical Datasheet (PDF) Complete specifications and technical drawings.

Technical Datasheet

Bently Nevada 125720-02 3500/32M 4-Channel Relay Output Module

Download Open in new tab
Quantità
Call sales Contact

Product Description

Description

The 125720-02 is the dedicated full-height rear I/O 4-Channel Relay Output Module required for hazardous area (Class I, Division 2 / Zone 2) and SIL functional safety applications in the Bently Nevada 3500 Machinery Protection System. Installed in the rear slot directly behind its corresponding 149986-02 front relay control module, the 125720-02 provides four single-pole, double-throw (SPDT) relay outputs for machine protection and shutdown logic. Each channel features switch-selectable operation and integrated arc suppression, with voltage and spacing compliance specifically rated for hazardous environments.

Features

  • Specialized rear I/O configuration for hazardous area (Class I, Div 2 / Zone 2) and SIL functional safety compliance
  • Direct interface with the 149986-02 front 4-channel relay control module
  • Four single-pole, double-throw (SPDT) relay channel connections
  • Epoxy-sealed standard relays with internal 250 Vrms arc suppressors
  • Built-in DIP switch selection for Normally De-energized (NDE) or Normally Energized (NE) operation
  • Removable terminal block connections for simplified field wiring

Applications

  • Machinery protection and emergency shutdown systems (ESD)
  • Rotating equipment monitoring in Class I, Division 2 / Zone 2 hazardous areas
  • Functional safety (SIL) rated turbine, compressor, and pump protection loops
  • Automated alarm and trip relay outputs in 3500 system racks

Ordering Information

Component Part Number Selection / Function
Hazardous/SIL Rear I/O Module 125720-02 Spare 4-Channel Relay Output Module (Hazardous Area / SIL Systems)
Matching Front Control Module 149986-02 Spare 4-Channel Relay Control Module (Front Slot)
Complete System Ordering Code 3500/32-01-01 / 3500/32-01-02 3500/32M Relay Module with 4-Channel Output & Hazardous Approval
Required Field Connector 00580436 6-position green terminal header (or 166M2390 push-in spring type)

Technical Specifications

Parameter Specification
Manufacturer Bently Nevada
Product Type 4-Channel Relay Output Module (Rear I/O)
Power Consumption 5.8 Watts typical
Relay Contact Type Single-pole, double-throw (SPDT)
Arc Suppressor 250 Vrms, standard installed
Contact Life 100,000 cycles @ 5 A, 24 Vdc or 240 Vac
Max Switched Voltage (Hazardous/SIL) 30 Vdc / 30 Vac
Max Switched Current (Hazardous/SIL) 2 A @ 0V to 30 Vdc / 2 A @ 30 Vac
Minimum Switched Current 100 mA @ 12 Vdc
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
Rack Space Requirement 1 full-height rear slot
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.)

Connections/Interfaces

Terminal Pin Function
NC Normally Closed relay contact
ARM Relay Armature / Common contact
NO Normally Open relay contact
Relay Mode Switch Selection switch for Normally De-energized (NDE) or Normally Energized (NE)

Installation Guidelines

  • Insert the 125720-02 into the rear full-height slot directly aligned with the 149986-02 front control module.
  • Set the relay mode selection DIP switches (NE/NDE) on the rear I/O card prior to wiring.
  • Connect field relay conductors using green 6-position terminal headers.
  • Observe strict maximum operating voltage limits of 30 Vdc or 30 Vac to maintain hazardous area and SIL certifications.

Compliance and Certifications

  • cNRTLus: Class I, Zone 2: AEx/Ex nA nC ic IIC T4 Gc; Class I, Zone 2: AEx/Ex ec nC ic IIC T4 Gc; Class I, Division 2, Groups A, B, C, and D; T4 @ Ta = -20 degC to +65 degC
  • ATEX/IECEx: Ex II 3 G; Ex nA nC ic IIC T4 Gc; Ex ec nC ic IIC T4 Gc; T4 @ Ta = -20 degC to +65 degC
  • EMC / Safety: Directive 2014/30/EU (EN 61000-6-2, EN 61000-6-4), Directive 2014/35/EU (EN 61010-1), RoHS 2011/65/EU
Shipping & Returns

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.

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 technical warranty.
FAQ
Which front module is paired with the 125720-02 rear output module?
It pairs directly with the 149986-02 spare 4-channel relay control module in the front slot.
Why is the 125720-02 required for hazardous area applications instead of standard rear modules?
It is designed with specific spacing and voltage limits (30 Vdc / 30 Vac max) to comply with Division 2/Zone 2 hazardous area and SIL safety certifications.
How are relay output modes configured on this module?
Each channel can be independently set to Normally De-energized (NDE) or Normally Energized (NE) using the mode selection switches on the rear panel.
Reviews

More from this brand

Bently Nevada 168679-01-01-01-02-03-05-01-01-00-02-02 ADRE 408 DSPi Dynamic Signal Processing Instrument
168679-01-01-01-02-03-05-01-01-00-02-02Bently Nevada 168679-01-01-01-02-03-05-01-01-00-02-02 ADRE 408 DSPi Dynamic Signal Processing Instrument
Bently Nevada 3300/50-02-01-00-00 Tachometer Monitor
3300/50-02-01-00-00Bently Nevada 3300/50-02-01-00-00 Tachometer Monitor
Bently Nevada 3300/16-02-01-01-01-00-00 XY/GAP Dual Vibration Monitor
3300/16-02-01-01-01-00-00Bently Nevada 3300/16-02-01-01-01-00-00 XY/GAP Dual Vibration Monitor
Bently Nevada 87890-01 Monitor Circuit Assembly for 3300/03 System Monitor
87890-01Bently Nevada 87890-01 Monitor Circuit Assembly for 3300/03 System Monitor

125720-02

Stock & lead time on request

Call
  • Bently Nevada 125720-02
  • Bently Nevada 125720-02
  • Bently Nevada 125720-02
1 3

Bently Nevada 125720-02 3500/32M 4-Channel Relay Output Module

Only 6 item(s) left in stock

  • Manufacturer: Bently Nevada

  • Product No.: 125720-02

  • Country of origin:United States

  • Product Type: Relay Output Module

  • Barcode: 8537101190

  • Payment: T/T, Western Union

  • Weight: 400g

  • Dimensions: 24.1 x 2.44 x 9.91 cm

  • Shipping port: Xiamen

  • Warranty: 12 months

Visualizza dettagli completi
Product Description
FAQ
Shipping Returns
Additional details
Reviews

Description

The 125720-02 is the dedicated full-height rear I/O 4-Channel Relay Output Module required for hazardous area (Class I, Division 2 / Zone 2) and SIL functional safety applications in the Bently Nevada 3500 Machinery Protection System. Installed in the rear slot directly behind its corresponding 149986-02 front relay control module, the 125720-02 provides four single-pole, double-throw (SPDT) relay outputs for machine protection and shutdown logic. Each channel features switch-selectable operation and integrated arc suppression, with voltage and spacing compliance specifically rated for hazardous environments.

Features

  • Specialized rear I/O configuration for hazardous area (Class I, Div 2 / Zone 2) and SIL functional safety compliance
  • Direct interface with the 149986-02 front 4-channel relay control module
  • Four single-pole, double-throw (SPDT) relay channel connections
  • Epoxy-sealed standard relays with internal 250 Vrms arc suppressors
  • Built-in DIP switch selection for Normally De-energized (NDE) or Normally Energized (NE) operation
  • Removable terminal block connections for simplified field wiring

Applications

  • Machinery protection and emergency shutdown systems (ESD)
  • Rotating equipment monitoring in Class I, Division 2 / Zone 2 hazardous areas
  • Functional safety (SIL) rated turbine, compressor, and pump protection loops
  • Automated alarm and trip relay outputs in 3500 system racks

Ordering Information

Component Part Number Selection / Function
Hazardous/SIL Rear I/O Module 125720-02 Spare 4-Channel Relay Output Module (Hazardous Area / SIL Systems)
Matching Front Control Module 149986-02 Spare 4-Channel Relay Control Module (Front Slot)
Complete System Ordering Code 3500/32-01-01 / 3500/32-01-02 3500/32M Relay Module with 4-Channel Output & Hazardous Approval
Required Field Connector 00580436 6-position green terminal header (or 166M2390 push-in spring type)

Technical Specifications

Parameter Specification
Manufacturer Bently Nevada
Product Type 4-Channel Relay Output Module (Rear I/O)
Power Consumption 5.8 Watts typical
Relay Contact Type Single-pole, double-throw (SPDT)
Arc Suppressor 250 Vrms, standard installed
Contact Life 100,000 cycles @ 5 A, 24 Vdc or 240 Vac
Max Switched Voltage (Hazardous/SIL) 30 Vdc / 30 Vac
Max Switched Current (Hazardous/SIL) 2 A @ 0V to 30 Vdc / 2 A @ 30 Vac
Minimum Switched Current 100 mA @ 12 Vdc
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
Rack Space Requirement 1 full-height rear slot
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.)

Connections/Interfaces

Terminal Pin Function
NC Normally Closed relay contact
ARM Relay Armature / Common contact
NO Normally Open relay contact
Relay Mode Switch Selection switch for Normally De-energized (NDE) or Normally Energized (NE)

Installation Guidelines

  • Insert the 125720-02 into the rear full-height slot directly aligned with the 149986-02 front control module.
  • Set the relay mode selection DIP switches (NE/NDE) on the rear I/O card prior to wiring.
  • Connect field relay conductors using green 6-position terminal headers.
  • Observe strict maximum operating voltage limits of 30 Vdc or 30 Vac to maintain hazardous area and SIL certifications.

Compliance and Certifications

  • cNRTLus: Class I, Zone 2: AEx/Ex nA nC ic IIC T4 Gc; Class I, Zone 2: AEx/Ex ec nC ic IIC T4 Gc; Class I, Division 2, Groups A, B, C, and D; T4 @ Ta = -20 degC to +65 degC
  • ATEX/IECEx: Ex II 3 G; Ex nA nC ic IIC T4 Gc; Ex ec nC ic IIC T4 Gc; T4 @ Ta = -20 degC to +65 degC
  • EMC / Safety: Directive 2014/30/EU (EN 61000-6-2, EN 61000-6-4), Directive 2014/35/EU (EN 61010-1), RoHS 2011/65/EU
Key Features:
#3500/32M #Relay Output Modules

Product Documentation

Technical Datasheet (PDF) Complete specifications and technical drawings.

Technical Datasheet

Bently Nevada 125720-02 3500/32M 4-Channel Relay Output Module

Download Open in new tab

Which front module is paired with the 125720-02 rear output module?
It pairs directly with the 149986-02 spare 4-channel relay control module in the front slot.

Why is the 125720-02 required for hazardous area applications instead of standard rear modules?
It is designed with specific spacing and voltage limits (30 Vdc / 30 Vac max) to comply with Division 2/Zone 2 hazardous area and SIL safety certifications.

How are relay output modes configured on this module?
Each channel can be independently set to Normally De-energized (NDE) or Normally Energized (NE) using the mode selection switches on the rear panel.

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

Country of origin
United States

Technical knowledge

Modular PLC CPU coordinating communication and I/O modules

Tutto sui PLC: la CPU

A practical engineering guide to PLC CPU operation, from deterministic scan cycles and I/O image tables to memory, communications, diagnostics, redundancy, processor sizing, and reliable system...

1756-L73 Firmware Upgrade Guide: v19 vs v21/v31 Decision

1756-L73 Firmware Upgrade Guide: v19 vs v21/v31 Decision

Replacing a 1756-L73 does not automatically mean upgrading its firmware. This guide compares v19.013, v21.011 and v31.011, focusing on project compatibility, HMI communications, legacy networks and...

Implementing 3-Switch XOR Ladder Logic with Internal Bit — figure 1

Implementazione della logica a scala XOR con 3 interruttori e bit interno

Implementa un circuito luminoso XOR con 3 interruttori SPST in LogixPro o RSLogix 500 utilizzando un bit di relè interno. Include tabelle della verità, equazioni booleane e verifica.

Building a Modbus RTU Network with CompactLogix and DeltaV — figure 1

Creazione di una rete Modbus RTU con CompactLogix e DeltaV

Integra Allen-Bradley CompactLogix, Caterpillar ATS e generatori nel DCS DeltaV tramite Modbus RTU. Include i gateway ProSoft MVI69-MCM e Miille DIN266.

ONS Instruction Not Energizing OTE in Studio 5000 Ladder Logic — figure 1

Istruzione ONS che non attiva l’OTE nella logica ladder di Studio 5000

L’istruzione ONS si attiva, ma la bobina OTE non rimane mai eccitata in Studio 5000 perché il one-shot è vero solo per una scansione. Usa OTL/OTU oppure una logica di autoritenuta.

Kinetix 5500 EtherNet/IP Network Switch Requirements and Topology — figure 1

Requisiti e topologia dello switch di rete EtherNet/IP Kinetix 5500

Configura i servoazionamenti Allen-Bradley Kinetix 5500 su EtherNet/IP. Include CIP Sync, la temporizzazione IEEE 1588 V2, la selezione degli switch Stratix, la topologia DLR e l’HMI.