Allen-Bradley 1440-TB-A XM-124 Intelligent I/O Terminal Base

Functional Overview

The 1440-TB-A is a specialized terminal base designed to support the Rockwell Automation XM Series of machinery protection and measurement modules, including the XM-124. This base acts as the physical foundation for the I/O system, providing all necessary field-wiring terminations for sensors and communication interfaces. By separating the permanent wiring from the electronic module, the 1440-TB-A allows for rapid hardware replacement without the need to disconnect field cables, significantly reducing maintenance downtime during critical diagnostics or upgrades.

Technical Characteristics

• Manufacturer: Allen-Bradley / Rockwell Automation

• Product Series: XM Series

• Model Number: 1440-TB-A

• Device Type: Intelligent I/O Terminal Base

• Input Voltage Range: 21.6V to 26.4V DC

• Current Consumption: 175 mA to 300 mA

• Terminal Screw Torque: 0.8 NM

• Operational Temperature: -20°C to 65°C (-4°F to 149°F)

• Storage Temperature: -40°C to 85°C

• Relative Humidity: 95% (Non-Condensing)

• Thermal Dissipation: 4 W to 7 W (14 to 24 BTU/HR)

• Mounting: DIN Rail or Direct Panel Mount

• Width Dimension: 94 mm

• Net Weight: 1.05 kg (2.31 lbs)

Industrial Application and Integration

Designed for harsh industrial environments, the 1440-TB-A ensures secure signal continuity for vibration, temperature, and speed measurement sensors. The base features heavy-duty terminals capable of handling precise torque settings to prevent loosening under high-vibration conditions common in turbine or motor-monitoring applications. Its compact 94 mm width allows for high-density grouping of modules within control cabinets. When correctly installed, the terminal base provides the necessary backplane connectivity for the XM module to communicate its analyzed data across the DeviceNet network.

Frequently Asked Questions

Can the 1440-TB-A be used with modules other than the XM-124?The 1440-TB-A is compatible with various XM series modules that utilize the same 1440 terminal base interface. However, always verify the specific terminal base compatibility listed in the datasheet for your specific module variant to ensure proper mechanical and electrical alignment.

What is the benefit of the terminal screw torque specification?The 0.8 NM torque specification is critical to maintaining low-resistance electrical contact. Proper torquing prevents oxidation and localized heating at the terminal interface, which is vital for maintaining signal accuracy for high-sensitivity vibration transducers.