Bently Nevada 125720-01 4-Channel Relay I/O Module

Bently Nevada 125720-01 Relay I/O Module

Availability: 3 left in stock

The Bently Nevada 125720-01 is a 4-channel relay I/O module designed for integration within the 3500/32M machinery protection system. This...

SKU: 125720-01

Manufacturer: Bently Nevada
Product No.: 125720-01
Product Type: Relay I/O Module
Product Origin: USA
Payment:T/T, Western Union
Weight: 500g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

The Bently Nevada 125720-01 is a 4-channel relay I/O module designed for integration within the 3500/32M machinery protection system. This full-height module serves as the interface between the rack's internal control signals and external electrical loads, providing four independent, programmable relay outputs to facilitate critical machine trip and alarm functions.

Features

Four independent, programmable relay outputs.
Integrated Alarm Drive Logic supporting AND/OR configurations.
Compatible with any slot to the right of the Rack Interface Module in a 3500 series rack.
Utilizes high-reliability SPDT (Single-Pole, Double-Throw) electromechanical relays.
Designed for seamless integration with 3500 Rack Configuration Software.

Applications

Oil & Gas: Protection for large centrifugal compressors, pumps, and blowers.
Power Generation: Emergency trip logic for steam and gas turbines during overspeed or high vibration events.
Petrochemical: Critical process machinery management and shutdown sequencing.
Water Management: Monitoring and protection for large-scale pumping infrastructure.

Technical Specifications

Model	125720-01
Type	Relay I/O Module
Channels	4
Power Supply	+5 V DC, +/- 15 V DC
Power Consumption	5-15 W (typical)
Contact Rating	2-5 A at 30 V DC / 250 V AC
Isolation	1500 V AC
Operating Temperature	-20 degC to +65 degC
Storage Temperature	-40 degC to +85 degC
Humidity	5-95% RH (non-condensing)

Installation Guidelines

Slot Placement: The I/O module must be installed in the rear of the 3500 rack, aligned directly behind the corresponding 3500/32M main module.
Insertion: Ensure the module is properly aligned with the chassis guide rails before sliding it into the rack.
Grounding: Tighten the two front-panel thumb screws securely to ensure a proper chassis ground connection and electrical integrity.
Handling: Always power down the rack before inserting or removing modules to prevent electrical damage or unexpected system behavior.

FAQ

What is the primary function of the 125720-01 module?

The 125720-01 is a relay I/O module for the 3500/32M system, used to output alarm and danger signals from the rack to external equipment using programmable logic.

Can I program the relay logic myself?

Yes, the module is configured using the 3500 Rack Configuration Software, which allows you to define specific AND/OR voting logic based on input from any monitor channel in the rack.

Is this module compatible with all 3500 racks?

It is designed for the 3500 series and can be installed in any slot located to the right of the Rack Interface Module or Transient Data Interface module.

What's clients say about us

Excellent Emergency Support!

Our production line was down due to a faulty Bently Nevada monitor. We found it in stock here and they shipped it via DHL immediately. Back in operation within 48 hours—truly a lifesaver for our plant.

Mark Thompson

Maintenance Manager, USA

Reliable Source for New Spares

Finding brand new, original modules is critical for our safety. This team delivers factory-fresh components with full certification. Their commitment to only selling new products makes them our most trusted partner.

Robert Hoffmann

Engineering Lead, Germany

Top-tier Service and Quality

We have sourced Honeywell and Schneider parts here for two years. Every shipment arrives well-packaged with original factory seals intact. Clear communication and the best lead times in the industry.