Allen Bradley 1756-LSP GuardLogix Processor Module

 

Allen Bradley 1756-LSP GuardLogix Processor Module

The 1756-LSP controller is a GuardLogix and ControlLogix controller from Allen-Bradley. It has a built-in serial port for communication with other devices. The 1756-LSP controller module can handle up to 250 controller connections at a single time. The non-volatile memory card that it is compatible with is the CompactFlash memory card. The 1756-LSP controller module comes with LEDs that act as status indicators which can let the users know whether the module is powered on or not and if there are any errors or malfunctions in the system. Because it is a member of the GuardLogix controller product line within the broader ControlLogix controller series, the 1756-LSP controller module is a safety module that is designed to handle specific safety-related applications in industrial systems.

The Allen-Bradley 1756-LSP is a GuardLogix safety partner controller. It has 250 connections but it does not have any user memory for standard tasks. Its safety memory depends on the memory of the corresponding primary controller. Its main purpose is to provide a redundancy, a second channel that is isolated for the system's safety-related functions. This controller has current draws of 1200 mA at 5.1V DC and 14 mA at 24V DC. Its power dissipation is 3.5 W and its thermal dissipation is 11.9 BTU/hr. The isolation voltage is a continuous 30V which is basic insulation that has been type-tested from RS-232 port-to-system at 720V DC for 60 seconds. Its operating temperature is from 0-60 ËšC and its non-operating temperature is from -40-85 Deg. C. It also comes with a maximum surrounding air temperature of 60 Deg. C. and a non-condensing relative humidity of 5-95%. Its operating shock is 30 g, its non-operating shock is 50 g, and its operating vibration is 2 g at 10-500 Hz. The configuration of the 1756-LSP safety partner is dependent on the primary controller since it does not have its own key switch and communication port although it has an RS-232 port. It comes with a battery for the clock and backup power. The controller also has LED status indicators allowing you to monitor its current state. The controller ships with a nonvolatile memory, a CompactFlash card to be exact. It measures 27 x 17 x 7 centimeters and weighs 0.7 lbs. The 1756-LSP safety partner is used for the 1756-L61S, 1756-L62S, and the 1756-L63S controllers. It should be installed in the slot to the right of the primary controller to satisfy SIL 3 requirements. It also has an open-type enclosure.

• EtherNet/IP, ControlNet, and DeviceNet Communication Options
• Dual Processors
• System-Wide Integration

The Rockwell GuardLogix Integrated Safety System is a full-function Logix processor that also provides safety control. The GuardLogix system is a dual processor solution that uses a primary controller and a safety partner to achieve SIL 3, PLe. A major benefit of this system is that it is a single project, with safety and standard control together. The GuardLogix system is a 1oo2 safety architecture that provides unmatched safety and ease of use.

Just like other Logix processors during development, safety and standard have the same rules. Online editing, forcing, even multiple users are all allowed. Once the project is tested and ready for final validation, you set the Safety Task to a SIL 3 integrity level, which is then enforced by the GuardLogix controller. When safety memory is locked and protected, the safety logic cannot be modified. On the standard side of the GuardLogix controller, all functions operate like a regular Logix controller, motion, drive, sequential, even process. Thus, online editing, forcing, and other activities are all allowed, while safety is securely isolated.

With this level of integration, safety memory can be read by standard logic and external devices, such as HMIs or other controllers, eliminating the need to condition safety memory for use elsewhere. The result is easy, system-wide integration and the ability to display safety status on displays or marquees. Use Guard I/O modules for field device connectivity on Ethernet or DeviceNet networks. For safety interlocking between GuardLogix controllers, use Ethernet or ControlNet networks. Multiple GuardLogix controllers can share safety data for zone-to-zone interlocking, or a single GuardLogix controller can use remote distributed safety I/O between different cells/areas.

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