1756-L55 | Allen Bradley | ControlLogix 5555 Programmable Controller

Product Description

The Allen Bradley 1756-L55 is a ControlLogix programmable controller designed for modular automation systems. It provides reliable processing capability with integrated battery backup and efficient thermal management. The controller is engineered for use in open-style enclosures and supports a wide operating temperature range, making it suitable for demanding industrial environments.

Technical Specifications

• Manufacturer Allen Bradley

• Product Line ControlLogix 1756 Series

• Product Type Programmable Controller

• Part Number 1756-L55

• Weight 0.75 lbs (0.34 kg)

• User Memory None (external memory modules required)

• Backplane Current Load

• 1.23–1.25 A @ 5.1 V DC

• 0.014 A @ 24 V DC

• Power Dissipation 5.6–5.7 W

• Thermal Dissipation 19.1–19.4 BTU/hr

• Isolation Voltage 30 V continuous

• Battery Included (1756-BA1)

• Enclosure Type Open-style

• Operating Temperature 0–60 °C (32–140 °F)

• Storage Temperature –40–85 °C (–40–185 °F)

Application Scenarios

• ControlLogix-based automation systems requiring modular controllers

• Industrial environments with wide temperature ranges

• Applications needing battery-backed operation for reliability

FAQ

Q: Does the 1756-L55 include onboard memory?  A: No, it requires external memory modules.

Q: What battery is included with the controller?  A: The 1756-BA1 battery is supplied.

Q: What is the operating temperature range?  A: 0–60 °C (32–140 °F).

Comparable Models

• 1756-L55: ControlLogix 5555 controller (this model)

• 1756-L61: Enhanced ControlLogix controller with larger memory

• 1756-L71: High-performance ControlLogix controller