Description

1756-L61 by Allen-Bradley is a ControlLogix series processor module designed for versatile and high-performance control applications. It supports up to 32 tasks and 100 programs per task, offering robust communication options and extensive I/O capacity.

General Information

• Part Number: 1756-L61
• Manufacturer: Rockwell Automation
• Category: PLC Module
• Series: ControlLogix
• Module Type: Processor Module
• Fixed Memory: 2, 4, or 8 MB
• Nonvolatile Memory: Compact Flash Card (1784-CF128)
• Weight: 0.71 lbs (0.32 kg)

Specifications

• Input Voltage: 24V DC
• Maximum I/O: 128,000 discrete, 4,000 analog
• Communication Port: RS-232, supporting ASCII, DF1, Modbus, DH-485
• Program Scan Time: 0.08 milliseconds
• User Memory: 2MB
• Backplane Current:
  • 1.2A at 5V DC
  • 14mA at 24V DC
• Vibration: 10-500 Hz
• Power Dissipation: 3.5W
• Thermal Dissipation: 11.9 BTU/hr

Environmental Data

• Operating Temperature: 0 to 60°C (32 to 140°F)
• Storage Temperature: -40 to 85°C (-40 to 185°F)
• Relative Humidity: 5% to 95% (Noncondensing)
• Altitude: -300 to +3,000 m (-1,000 to +10,000 ft)
• Vibration: 2g at 10 to 500 Hz
• Shock:
  • Operating: 30g
  • Non-operating: 50g

Communication Options

• Protocols:
  • ControlNet
  • Data Highway Plus (DH+), EtherNet/IP
  • DeviceNet, SynchLink
  • Remote I/O
  • Third-party networks

Additional Features

• Battery: 1756-BA1, 1756-BATM, 1756-BATA
• Programming Languages:
  • Relay Ladder Logic (RLL)
  • Structured Text (ST)
  • Function Block Diagram (FBD)
  • Sequential Function Chart (SFC)
• Motion Control: Supports embedded SERCOS interface for motion applications

Usage

Ideal for medium-scale processes with the ability to expand I/O through additional modules. The 1756-L61 is widely used in critical systems requiring high availability and redundancy.