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1756-L71 | ControlLogix 2 MB Controller

1756-L71 | ControlLogix 2 MB Controller

Regular price $60.00 USD
Regular price $78.00 USD Sale price $60.00 USD
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  Technical Specifications for 1756-L71

Manufacturer Rockwell Automation
Series ControlLogix
Integrated Motion • SERCOS interface • Analog options (encoder input, LDT input, SSI input) • Integrated Motion on the EtherNet/IP network
Redundancy Full Support
Optional Communication adapters • EtherNet/IP • ControlNet • DeviceNet • Data Highway Plus • Remote I/O • SynchLink • Third-party process and device networks
Built-in communication 1 USB port
Event Task All Triggers
Programs per task 100 Programs
No. of task 32
Non-volatile memory 1GB (ships with the controlelr)
Product Type Programmable Automation Controller
Brand Allen-Bradley
Module Type Processor Module
Part Number/Catalog No. 1756-L71
Maximum I-O 128000
Maximum Analog I-O 4000
I-O Memory 0.98 MB
User Memory 2 MB
Maximum Digital I-O 128,000
Current Draw (1.2 Volts DC) 5 milliamps
Current Draw (5.1 Volts) 800 milliamps
Power Dissipation 2.5 Watts
Thermal Dissipation 8.5 BTU per hour
Isolation Voltage 30 Volts Continuous
Enclosure None
Communication DeviceNet, ControlNet, EtherNet/IP, Remote I/O
UPC 10612598876010
UNSPSC 32151705

weight : 0.394 kg

 

About 1756-L71

The Allen-Bradley 1756-L71 is a ControlLogix Programmable Automation Controller. It has an available storage of 2 MB for user memory and an I/O memory of 0.98 MB. It also has an onboard 4-character alphanumeric display for easy monitoring of run-time and module information and controller diagnostics. It has an open-style enclosure and built-in One (1) 2.0 full-speed USB port available. The communication options that are available include DeviceNet, ControlNet, EtherNet/IP, Remote I/O Data Highway Plus, Third-party process and networks, and SynchLink. It also ships with a 1 GB non-volatile memory, but you can upgrade it to 2 GB with the 1784-SD2. It is recommended that the SD card be left installed in the controller. The 1756-L71 controller ships with three capacitor energy storage modules, two of which are removable. It has a current draw of 5 mA at 1.2 Volts DC and 800 mA at 5.1 Volts DC. The 1756-L71 controller also has a continuous isolation voltage of 30 Volts, a maximum power dissipation of 2.5 Watts, and a thermal dissipation of 8.5 BTU/hour. It has a maximum analog I/O, digital I/O, and a total I/O of 4,000, 128,000, as well as 128,000, respectively. It has an operating temperature range of 0 to 60 Degrees Celsius and a storage temperature range of -40 to 85 Degrees Celsius. Its maximum surrounding air temperature is 60 degrees Celsius and it has a noncondensing relative humidity of 5% to 95%. The controller has a vibration of 2G at 10 to 500 Hertz, an operating shock of 30G, and a non-operating shock of 50G that goes down to 45G when the SD card is installed. Other controllers may require the user to understand first PLC registers specifically Byte and Bit in order to start addressing program elements. With 1756-L71, the user simply needs to insert a program element and select the logical channel to where the I/O is physically wired. In other PLCs, the user may find the need to move a register to another to initiate conversion and processing just to get the analog data. This controller simply requires the user to find the logical channel where the I/O signal is physically terminated.

This controller is part of the modern Logix controller platform which are classified as Programmable Automation Controller (PAC). This PAC product range is ideally used for medium to large automation requirements, particularly compatible in control requirements of Factory and Process Automation industries.

The 1756-L71 mainly feature 2MB user memory and 0.98 MB I/O memory. It is also shipped with a 1784-SD1 Secure Digital (SD) memory card amounting to 1 GB non-volatile memory which can be upgraded to 2GB by replacing with 1784-SD2 card. This controller can handle up to 128,000 Discrete input and output signals and 4000 Analog Input and output signals as well.

Being a modern controller, the 1756-L71 does not use battery to retain the contents of the Random Access Memory (RAM) or volatile memory instead, it is equipped with energy storage modules with catalog number 756-ESMCAP or 1756-ESMCAPK. This energy storage module is of removable type which is capacitor based.

For industrial communication, the 1756-L71 supports installation of communication adapters. Other supported communication protocols by the 1756-L71 are EtherNet/IP, ControlNet, DeviceNet, Data Highway Plus, Remote I/O, SynchLink, Third-party process and device networks.

This controller is a chassis based controller. Which means a specific ControlLogix chassis must be installed in order to mount the module. Compatible chassis include 1756-A4, 1756-A4K, 1756-A7, 1756-A7K, 1756-A10, 1756-A10K, 1756-A13, 1756-A13K,1756-A17, 1756-A17 K.

FAQ for 1756-L71

Where can I send the 1756-L71 to be repaired?

we offers a variety of repair services for the 1756-L71.

What type of memory does the 1756-L71 have?


The 1756-L71 has a user memory of 2 MB and an I-O Memory of 0.98?

What is this module’s power dissipation?


The 1756-L71 has a dissipation of around 2.5 Watts.

What kind of enclosure does the 1756-L71 require?


The 1756-L71 does not require an enclosure.

What is the SD slot for on the 1756-L71


The memory card enables the user to keep a copy of the project on the controller without the need to maintain power to the controller. The memory card can be used to store the contents of the user memory when project is stored.

Do the 1756-L71 Controllers use battery to retain program?


Instead of batteries, the Logix 5570 family (including 1756-L71) uses Energy Storage Modules (ESM). The ESM allows this unit to save the program to the onboard nonvolatile storage (NVS) memory of the controller even after power is turned off to the rack or the controller is taken out of a powered on rack.

Does the 1756-L71 provided with embedded Ethernet I/P port?


No. It only has 1 USB port, however, Ethernet port may be added via optional communication adapters.

What is the size of the embedded user memory of this controller?


The 1756-L71 has 2 MB user memory, 0.98 I/O memory and 1 GB non-volatile memory.

Can I mount this controller to a DIN rail?


No. This controller requires a ControlLogix chassis to mount.

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