Allen-Bradley 1756-L63S GuardLogix Safety Controller

Allen-Bradley 1756-L63S GuardLogix Safety Controller

Product Introduction

The Allen-Bradley 1756-L63S is a high-performance GuardLogix controller from the ControlLogix family. It is specifically engineered for applications requiring both standard control and functional safety. This controller integrates a primary processor with a safety partner coprocessor. The safety partner provides an isolated second channel for executing safety functions. Consequently, the 1756-L63S is ideal for machinery safety, process safety, and critical infrastructure protection. Furthermore, it supports SIL 3 (Safety Integrity Level 3) applications. Users benefit from a single platform that handles standard logic and safety tasks simultaneously. This integration reduces system complexity and overall hardware costs. The 1756-L63S also offers flexible networking for seamless plant-wide integration.

Technical Specifications

The 1756-L63S GuardLogix controller comes with 8 MB of user memory for standard control programs. Additionally, it features 3.75 MB of dedicated safety memory for safety-related logic and data. The controller has 478 KB of I/O memory for handling input and output data. It 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 controller 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 testing performed at 720 Volts DC for 60 seconds. The enclosure type is open-style, designed for installation within a protected control cabinet.

Safety Features and Architecture

The 1756-L63S distinguishes itself through its integrated safety architecture. It includes a dedicated safety partner coprocessor that operates independently from the primary controller. This coprocessor provides the necessary redundancy for safety functions. Specifically, it monitors the primary processor and executes safety tasks if a fault occurs. This design eliminates the need for a separate safety controller, reducing panel space and wiring. The 1756-L63S supports safety communication over EtherNet/IP (CIP Safety), ControlNet, and DeviceNet. It is certified for use in SIL 3 applications according to IEC 61508. Additionally, it complies with ISO 13849-1 for Performance Level e (PLe). The controller can handle standard and safety I/O modules within the same chassis. This integration simplifies system design and maintenance.

Communication Capabilities

The 1756-L63S controller supports a wide range of communication options. It features standard and safety communication through EtherNet/IP, ControlNet, and DeviceNet networks. For standard communication, it supports protocols like DF1 full/half-duplex, ASCII, and Modbus via logic. The controller does not have a built-in key switch or dedicated communication port. Instead, all configuration and operation occur through the primary controller interface. Physical connections to I/O modules and other devices are established via the 1756 ControlLogix chassis backplane. Users can also integrate additional communication modules for extended connectivity. These include modules for Data Highway Plus, SynchLink, and Remote I/O. Furthermore, the 1756-L63S supports third-party process and device networks through compatible interface modules. This versatility ensures the controller fits into diverse automation architectures.

Mechanical and Environmental Parameters

The 1756-L63S 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 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. The module weighs approximately 0.71 pounds (0.32 kilograms) , making it lightweight for easy installation. It is powered through the ControlLogix chassis backplane. There is no need for additional configuration or wiring for power supply operations. The built-in lithium battery retains the user program and data during power outages.

Programming and System Modes

The 1756-L63S supports multiple programming languages for both standard and safety applications. Supported languages include Relay Ladder, Structured Text, Function Block Diagram (FBD) , and Sequential Function Chart (SFC) . The controller can handle up to 32 tasks concurrently, with each task capable of running 100 programs. It supports event tasks with all event triggers available. The controller system combines several operational modes, including RUN, PROGram, and REMote modes. While the 1756-L63S itself does not have a physical key switch, the system modes are controlled through the primary controller interface. This design ensures secure and controlled functioning. The controller supports OS upgrades, user program storage, and data retrieval by way of memory cards. It can handle up to 250 controller connections for extensive networking.

Installation Guidelines

The 1756-L63S is a chassis-based module designed for the 1756 ControlLogix chassis. Compatible chassis 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-L63S into the chassis until it is firmly seated. Secure the module by closing the locking latch. The module is hot-swappable, but always follow proper safety practices. Ensure the power supply meets the backplane current requirements of 1200 mA at 5.1V DC and 14 mA at 24V DC. For safety applications, verify that the safety partner is correctly configured through the programming software. Always use appropriate safety-rated cables and connectors.

Packaging List

The standard packaging for the Allen-Bradley 1756-L63S GuardLogix controller includes the following items:

One 1756-L63S GuardLogix controller module.
One built-in lithium battery for memory retention.
One product information sheet with installation instructions.
Anti-static packaging to protect the module during transit.
Shipping documentation and packing slip.

Shipping and Delivery

All orders for the 1756-L63S safety controller 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 difference between the 1756-L63S and a standard ControlLogix controller?
The 1756-L63S is a GuardLogix safety controller that includes a dedicated safety partner coprocessor. This provides an isolated second channel for SIL 3 safety functions. Standard ControlLogix controllers do not have this integrated safety capability.

2. Can the 1756-L63S communicate over EtherNet/IP for safety data?
Yes, the 1756-L63S supports safety communication over EtherNet/IP using the CIP Safety protocol. It also supports safety communication over ControlNet and DeviceNet networks.

3. What is the safety memory capacity of the 1756-L63S?
The 1756-L63S has 3.75 MB of dedicated safety memory in addition to its 8 MB of standard user memory. This memory is reserved exclusively for safety-related logic and data.

4. What chassis are compatible with the 1756-L63S?
The 1756-L63S 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 1756-L63S suitable for SIL 3 applications?
Yes, the 1756-L63S GuardLogix controller is certified for use in SIL 3 applications according to IEC 61508. It also complies with ISO 13849-1 for Performance Level e (PLe).