Allen-Bradley 1440-REX03-04RG | XM-442 Voted EODS Relay Module

Overview

The 1440-REX03-04RG from Allen-Bradley is an XM-442 Voted EODS Relay Module designed for industrial overspeed protection applications. It complies with API 670 standards for Machinery Protection Systems and API 612 for steam turbines in petroleum, petrochemical, and natural gas industries.

This module works with three XM-220 modules, signaling critical failure conditions. When two out of three signals are active, the 1440-REX03-04RG automatically shuts down the process and triggers an alarm. Its voting logic ensures accurate safety response without manual configuration.

Equipped with four DPDT relays, each with two sets of contacts rated at 250V AC, 3A resistive, this module provides reliable shutdown and alarm activation. The failsafe design keeps the relays normally energized, and both local and remote reset options are available for operational flexibility.

The module features three LED indicators for power, shutdown, and alarm status, providing clear visual feedback. Activation occurs with a low logic level (<0.8V) on overspeed or circuit fault inputs, ensuring rapid and dependable response.

Key Features

• Brand: Allen-Bradley / Rockwell Automation

• Model: 1440-REX03-04RG

• Series: XM

• Module Type: Voted EODS Relay

• Operating Voltage: 24V DC

• Number of Relays: 4 DPDT (2 Form C per relay)

• Contact Ratings: 250V AC, 50/60 Hz, 3A resistive

• Failsafe: Normally energized

• Latching: Shutdown and alarm relays latch when activated

• Voting Logic: Two-out-of-three / One-out-of-three

• Activation Input: Low logic (<0.8V)

• Reset: Local switch and remote reset terminal

• Indicators: 3 LEDs (Power, Shutdown, Alarm)

• Manufacturer: Allen-Bradley / Rockwell Automation

Technical Specifications

Advantages

• Complies with API 670 and 612 standards for industrial safety

• Four DPDT relays provide reliable shutdown and alarm control

• Two-out-of-three voting logic ensures accurate fault detection

• Failsafe, normally energized relays increase operational safety

• LED indicators provide clear, immediate status feedback

• Local and remote reset options improve system flexibility

FAQ

Q1: Is the Allen-Bradley 1440-REX03-04RG brand new?
A1: Yes, it is fully original, factory-sealed, and brand new.

Q2: How quickly can this module be shipped?
A2: We ship within 3 days to 2 weeks depending on order size, commonly via DHL.

Q3: What voltage does the 1440-REX03-04RG operate on?
A3: It operates on 24V DC for reliable safety control.

Q4: How many relays are included and what is their rating?
A4: It has 4 DPDT relays, each rated at 250V AC, 3A resistive.

Q5: What type of voting logic is used?
A5: The module supports two-out-of-three or one-out-of-three voting for safety-critical applications.

Q6: Are there options for resetting the module?
A6: Yes, it includes both a local reset switch and remote reset terminals.