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

Configured for relay alarm actuation and discrete event execution in XM condition monitoring networks, the Allen-Bradley 1440-REX00-04RD (1440-REX00 Expansion Relay Module) provides direct electrical execution through four DPDT relay outputs linked to host XM measurement modules or XM-440 master relay modules.

Suffix Breakdown & Model Matrix

The supplied documentation identifies 1440-REX00-04RD as a fixed XM-441 relay expansion module configuration. No additional suffix matrix or configurable ordering structure is specified in the available data.

Hardware Specifications

EtherNet/IP and ControlNet Expansion Integration

The XM relay expansion architecture operates through host module coordination rather than standalone processing. Relay state transitions, latch handling, timing sequences, and activation logic are managed by the associated XM host module over the internal expansion interface.

When integrated into deterministic industrial control networks such as ControlNet or EtherNet/IP through compatible XM communication adapters, relay command propagation depends on host module scan execution and network scheduling parameters. Wiring segregation between relay outputs and low-level signal conductors is recommended to minimize transient coupling during relay switching events.

Frequently Asked Questions

Q: Does the 1440-REX00-04RD support standalone operation without a host XM module?
A: No. The module functions as an expansion relay device and requires connection to an XM measurement module or XM-440 master relay module for relay control and logic execution.

Q: Are relay outputs configured as failsafe contacts?
A: The module supports both normally energized (failsafe) and normally de-energized operating modes as managed by the host XM module configuration.

Q: Can relay contacts switch inductive loads directly?
A: The documented relay rating specifies 250 VAC at 3 A resistive load. External suppression components are recommended when switching inductive devices such as contactors or solenoids to reduce contact arcing and transient generation.

Field Installation Guidelines

Mount the module on the designated XM terminal base using the manufacturer-defined locking engagement points before field wiring is applied.

Separate relay output conductors from vibration transducer wiring, tachometer inputs, and low-level analog signal cables to reduce electromagnetic coupling during relay switching.

Use shield termination practices consistent with the control cabinet grounding topology. Shield drains should terminate at a single grounding reference point to avoid circulating ground currents.

Verify relay load current and voltage levels before energization. External interposing relays should be used when field loads exceed the documented resistive switching ratings.

Inspect terminal torque and connector retention after cabinet vibration testing or transport handling operations.