Allen-Bradley 1756-L1 ControlLogix 5550 controller

The Allen-Bradley 1756-L1 is a ControlLogix 5550 controller. It can support up to 250 connections and weighs 0.28 kilograms or 10.0 ounces. This particular controller has a 64 Kilobytes user memory. Installing the 1756-L1 is installed directly into any slot available in the chassis and multiple controllers can be installed in any other slot within the same chassis. These controllers that belong to the same chassis, may communicate communicate with each other across the backplane as well as operate independently. The 1756-L1 has the capacity to communicate across DeviceNet, RS-232-C (DF1/DH-485 protocol), ControlNet, DH+, and EtherNet/IP networks. Note that it does not have a nonvolatile memory.

Technical specifications for 1756-L1

ManufacturerRockwell Automation

BrandAllen-Bradley

Part Number/Catalog No.1756-L1

SeriesControlLogix

Module TypeProcessor Module

User Memory64 KB

Isolation Voltage30 Volts Continuous

Communication PortOne (1) RS232

Operating Temperature32-140 Fahrenheit (0-60 Celsius)

Compatible Memory Modules1756-M1, 1756-M2 and 1756-M3

Minimum Operating Current2 milliamps at 10 Volts DC

Battery Back-Up1756-BA1; 1756-BA2

Maximum Operating Current3.5 milliamps at 30 Volts DC

Communication Cable1756-CP3

Maximum Input Current, Off-State1.5 milliamps

EnclosureOpen

Power Dissipation (Max)4.1 Watts at 60 degrees Celsius

SLot WidthOne (1)

Backplane Current at 5 Volts120 milliamps

Backplane Current at 24 Volts2 milliamps

Removeable Terminal Block(s)1756-TBCH, 1756-TBS6H

The 1756-L1 has a peak backplane current of 0.65 Amps at 5 Volts DC and 0.02 Amps at 24 Volts DC. It also has an average power dissipation of 3.3 Watts and an average thermal dissipation of 11.3 BTU/hour. The storage temperature of the 1756-L1 is from -40 to 85 Degrees Celsius, while its operating temperature ranges from 0 to 60 Degrees Celsius. It also has a noncondensing relative humidity of 5% to 95%. The storage shock of the 1756-L1 is 50 G peak for 11 milliseconds, while its operating shock is 30 G peak for 11 milliseconds. It also has a 10 to 500 Hertz vibration with a maximum peak acceleration of 2.0 G. If the 1756-L1 has a battery in need of replacement, you can only use the 1756-BA1, which is a 0.59g lithium battery. The programming cable compatible with the 1756-L1 are the category 3 serial cables 1756-CP3 and 1747-CP3.

1756-L1

Allen Bradley ControlLogix Processor Module with 64 KB User Memory

1756-L1M1

Allen Bradley ControlLogix Processor Module with 512 KB Expansion Memory

1756-L1M2

Allen Bradley ControlLogix Processor Module with 1 MB Expansion Memory

1756-L1M3

Allen Bradley ControlLogix Processor Module with 2 MB Expansion Memory