ControlLogix Logix5550 Controller | 1756-L1 Allen-Bradley

Allen-Bradley ControlLogix 5550 1756-L1 Controller

The 1756-L1 from Rockwell Automation is a compact programmable automation controller (PAC) for ControlLogix systems. With 64KB user memory and multi-network communication capabilities, it's ideal for medium-scale industrial automation applications.

CORE SPECIFICATIONS

• Brand: Allen-Bradley (Rockwell Automation)
• Series: Logix 5550
• Model: 1756-L1
• User Memory: 64KB + expandable via 1756-M1/M2/M3 modules
• I/O Capacity: 128,000 discrete / 4,000 analog points
• Connections: Supports up to 250 simultaneous
• Weight: 0.28kg (10oz) compact design

COMMUNICATION FEATURES

• Built-in Port: RS-232 (DF1/DH-485 protocol)
• Network Support: DeviceNet, ControlNet, EtherNet/IP, DH+
• Programming Cables: 1756-CP3 or 1747-CP3 Category 3

PHYSICAL SPECIFICATIONS

• Power: 3.3W average (4.1W max @60°C)
• Backplane Current: 120mA @5V DC, 2mA @24V DC
• Battery: Requires 1756-BA1 lithium battery
• Enclosure: Open-type design

ENVIRONMENTAL RATINGS

• Operating Temperature: 0°C to 60°C (32°F to 140°F)
• Storage Temperature: -40°C to 85°C (-40°F to 185°F)
• Humidity: 5-95% non-condensing
• Vibration: 10-500Hz @ 2.0G max

APPLICATION FEATURES

• Programming: Supports IEC 61131-3 languages (Ladder, FBD, SFC)
• Compatibility: Works with ControlLogix, Flex I/O, and POINT I/O
• Diagnostics: Front-panel LED status indicators

INSTALLATION NOTES

• Fits any ControlLogix chassis (1756-A4, A7, A10, etc.)
• Occupies single slot width
• Requires RSLinx for communication setup

SHIPPING OPTIONS

• FedEx Priority Overnight
• UPS 2-Day Air
• DHL Express Worldwide
• Ground shipping available

Technical Documentation

📥 Download Product Datasheet PDF

FAQ

1. How much user memory does the 1756-L1 have?

The 1756-L1 features 64KB user memory expandable via 1756-M1/M2/M3 memory modules.

2. What communication ports are built into this controller?

It includes an RS-232 port supporting DF1 and DH-485 protocols.

3. What is the power consumption of the 1756-L1?

Average power consumption is 3.3W (4.1W maximum at 60°C).