1440-REX00-04RD | Allen-Bradley | XM-441 Expansion Relay Module

Product Overview

The Allen-Bradley 1440-REX00-04RD, specifically identified as the XM-441 Expansion Relay Module, extends the relay output capabilities of the XM dynamic measurement system. This module provides additional physical relay contacts to trigger alarms, shutdowns, or interlocking logic based on vibration and machinery health data. It integrates seamlessly into the XM monitoring network to ensure local, high-speed machinery protection. We supply this unit as 100% Brand New and Original, ensuring your protection system operates with maximum mechanical integrity and zero prior wear.

Technical Specifications

The 1440-REX00-04RD provides robust switching performance for critical industrial protection loops:

Engineering Advantages

The 1440-REX00-04RD addresses the complex demands of machinery protection and safety interlocking:

• Localized Protection Logic: This module executes relay actions locally on the XM bus. By bypassing the delay of a centralized PLC scan cycle, it triggers machine trips within milliseconds of a detected vibration spike, preventing catastrophic equipment failure.

• Modular Scalability: The "RD" configuration allows engineers to expand relay counts without replacing the primary XM-120 or XM-124 vibration monitors. This modularity reduces overall hardware costs and simplifies cabinet wiring.

• EMI/RFI Shielding: The module’s internal circuitry rejects electromagnetic interference commonly found near large motor drives and turbomachinery. This ensures that electrical noise does not cause "nuisance trips" or false alarms.

• Compact DIN Rail Mounting: The 0.55 lb lightweight design and small footprint permit installation in high-density junction boxes located close to the machine. This proximity reduces the length of expensive shielded cabling required for transducer-to-monitor runs.

FAQs

How does the 1440-REX00-04RD communicate with the master XM module?

The module connects via the XM system’s side-connector expansion bus. This bus provides both the necessary power and the high-speed logic signals required to trigger the relays based on the master monitor's configuration.

Can I configure the relays as Normally Open (NO) or Normally Closed (NC)?

Yes. The XM-441 allows for flexible configuration. You can define the relay state through the XM configuration software to meet specific fail-safe requirements or standard alarm logic.

What is the significance of the "Brand New" status for this relay module?

Relay contacts possess a finite mechanical life. By purchasing a 100% Brand New 1440-REX00-04RD, you ensure the internal contacts have zero pitting or oxidation. This guarantees the low contact resistance required for millivolt-level signal interlocking and maximum reliability in emergency shutdown (ESD) systems.

Is this module compatible with all XM-series monitors?

The 1440-REX00-04RD primarily supports the XM-440 master modules. Always verify your master monitor's firmware version to ensure full compatibility with expansion relay logic.