1756-L1M1 Controller Processor | Allen-Bradley

Allen-Bradley 1756-L1M1 ControlLogix 5550 Controller

The 1756-L1M1 by Rockwell Automation is a high-performance PAC (Programmable Automation Controller) for industrial automation. With 500KB data/logic memory and 150KB I/O memory, it delivers reliable control for medium-scale applications. Compact and lightweight (0.35kg), it fits seamlessly into ControlLogix systems.

KEY SPECIFICATIONS

• Brand: Allen-Bradley (Rockwell Automation)
• Model: 1756-L1M1 (ControlLogix 5550 Series)
• Memory: 500KB data/logic + 150KB I/O (expandable)
• Backplane Current: 950mA @5.1V, 20mA @24V
• Power: 5.33W max (4.6W avg)
• Isolation: 30V continuous (tested to 500V for 60s)

HIGHLIGHTS

• Robust Design: Open enclosure, 0.35kg weight
• ESD Immunity: 6kV contact / 8kV air discharge
• Environmental Durability: Operates in 0–60°C, withstands 30G shock
• Compatibility: Works with 1756-CP3 serial cable & 1756-BA1 battery

TECHNICAL DETAILS

• Humidity: 5–95% non-condensing
• Vibration: 10–500Hz @ 2.0G max
• Communication: RS-232 via 1756-CP3 cable
• RF Immunity: 10V/m (30MHz–1GHz)

TYPICAL APPLICATIONS

• Factory automation systems
• Process control in harsh environments
• Material handling and packaging lines

INSTALLATION NOTES

• Fits any ControlLogix chassis slot
• Requires 1756-BA1 lithium battery for backup
• No nonvolatile memory (expandable via modules)