Allen-Bradley 1756-L65 ControlLogix Processor 32 MB

Allen-Bradley 1756-L65 ControlLogix Processor Module

Product Introduction

The Allen-Bradley 1756-L65 is a high-capacity processor module from the ControlLogix family. Manufactured by Rockwell Automation, this controller belongs to Series B of the ControlLogix 5560 controllers. It is specifically designed for large-scale automation applications requiring substantial memory. The 1756-L65 provides 32 MB of user memory, offering ample space for complex logic, data tables, and extensive programs. Additionally, it features 478 KB of I/O memory dedicated to managing input and output data. This processor supports a wide range of communication options and network protocols. Consequently, it integrates seamlessly into diverse industrial environments. The 1756-L65 is a reliable choice for users needing high-performance control with significant memory capacity.

Technical Specifications

The 1756-L65 controller comes equipped with a substantial 32 MB user memory for both data and logic storage. It also includes 478 KB of I/O memory for handling input and output operations. The controller supports a maximum total I/O count of 128,000 points. Furthermore, it can manage up to 4,000 analog I/O points and 128,000 digital I/O points. The module draws 1200 mA at 5.1 Volts DC and 14 mA at 24 Volts DC from the backplane. Its power dissipation is 3.5 Watts, translating to 11.9 BTU/hr of thermal dissipation. The continuous isolation voltage is rated at 30 Volts, with type testing performed at 720 Volts DC for 60 seconds. The enclosure type is open-style, intended for installation within a protected control cabinet. The controller weighs approximately 0.71 pounds (0.32 kilograms) .

Memory and Storage Options

The 1756-L65 offers flexible memory and storage solutions for various application needs. Its 32 MB user memory provides generous capacity for large programs and extensive data tables. For non-volatile storage, users can install an optional memory card. Specifically, the controller accepts the 1784-CF128 CompactFlash memory card, which provides 128 MB of storage capacity. This optional storage is useful for backing up programs and data. The controller also includes a replaceable battery for memory retention during power outages. The compatible battery for the 1756-L65 is the 1756-BA2 lithium battery. This battery should only be replaced when necessary to maintain data integrity. Users can perform OS upgrades and data retrieval through the memory card interface.

Communication Capabilities

The 1756-L65 features a built-in RS-232 serial communication port for direct connectivity. This port supports multiple protocols, including DF1 full/half-duplex, DF1 radio modem, ASCII, DH-485, and Modbus via logic. Beyond the built-in port, the controller supports various optional communication modules. These include EtherNet/IP, ControlNet, DeviceNet, Data Highway Plus, SynchLink, and Remote I/O. Additionally, it can interface with third-party process and device networks through compatible modules. The 1756-L65 can support up to 250 controller connections for extensive system networking. This extensive connectivity ensures the controller fits into virtually any industrial network architecture. Users can choose the most suitable communication method for their specific application requirements.

Mechanical and Environmental Parameters

The 1756-L65 operates within a temperature range of 0 to 60 degrees Celsius (32 to 140 degrees Fahrenheit) . For storage, it can withstand temperatures from -40 to 85 degrees Celsius. The maximum surrounding air temperature is 60 degrees Celsius. The controller functions reliably in environments with 5 to 95% relative humidity (non-condensing) . It can endure vibrations of 2g at 10 to 500 Hz. Moreover, it has an operating shock tolerance of 30g and a non-operating shock tolerance of 50g. These robust specifications make the 1756-L65 suitable for demanding industrial conditions. The module is powered through the ControlLogix chassis backplane. Proper ventilation should be ensured to maintain optimal operating temperatures.

Programming and Tasks

The 1756-L65 supports multiple programming languages to suit various application needs. Supported languages include Relay Ladder, Structured Text, Function Block Diagram (FBD) , and Sequential Function Chart (SFC) . Like other ControlLogix 5560 controllers, the 1756-L65 features three main controller task structures. It can handle up to 32 tasks concurrently. Each task can contain up to 100 programs, allowing for organized and structured code. The controller also supports event tasks with all event triggers available. This feature enables immediate response to specific external or internal events. Users should note that the scanning time of the 1756-L65 may be slower than other ControlLogix 1756-L6x controllers. This occurs when the same project is loaded to these controllers due to the larger memory footprint.

Installation Guidelines

The 1756-L65 processor module is a chassis-based unit designed for the 1756 ControlLogix chassis. Compatible chassis models include the 1756-A4, 1756-A7, 1756-A10, 1756-A13, and 1756-A17. Begin installation by ensuring the chassis is properly mounted and grounded. Next, align the module with the card guides in the selected slot. Carefully slide the 1756-L65 into the chassis until it is firmly seated. Then, secure the module by closing the locking latch. The module is hot-swappable, but ensure proper system configuration and safety practices. Always verify that the power supply meets the backplane current requirements. The 1756-L65 uses communication cables such as the 1756-CP3 or 1747-CP3 for serial connections. These cables feature a right-angle connector for the controller side and a straight connector for the serial port side.

Packaging List

The standard packaging for the Allen-Bradley 1756-L65 processor module includes the following items:

One 1756-L65 ControlLogix processor module.
One 1756-BA2 lithium battery for memory retention.
One product information sheet with installation notes.
Anti-static packaging to protect the module during transit.
Shipping documentation and packing slip.

Shipping and Delivery

All orders for the 1756-L65 processor module are shipped using premium express couriers. We ship exclusively via FedEx, UPS, and DHL to ensure fast and reliable delivery. Shipping options include express, standard, and economy services. Tracking information will be provided once the order is dispatched.

Frequently Asked Questions (FAQ)

1. What is the user memory capacity of the 1756-L65 controller?
The 1756-L65 has 32 MB of user memory for logic and data storage. It also includes 478 KB of dedicated I/O memory for handling input and output operations.

2. What type of battery does the 1756-L65 processor use?
The 1756-L65 uses the 1756-BA2 lithium battery for memory retention. This battery is replaceable and should only be changed when necessary to maintain data integrity.

3. What memory card is compatible with the 1756-L65?
The 1756-L65 accepts the 1784-CF128 CompactFlash memory card for optional non-volatile storage. This card provides 128 MB of backup storage capacity for programs and data.

4. What chassis are compatible with the 1756-L65?
The 1756-L65 is compatible with all standard 1756 ControlLogix chassis, including the 1756-A4, 1756-A7, 1756-A10, 1756-A13, and 1756-A17 models.

5. Is the scan time of the 1756-L65 slower than other ControlLogix controllers?
Yes, the scanning time of the 1756-L65 may be slower than other ControlLogix 1756-L6x controllers. This occurs when the same project is loaded to these controllers due to the larger memory configuration.