Product Overview

The Allen-Bradley 1756-L7SP is a GuardLogix safety partner controller. This controller is paired with a primary GuardLogix L7 Safety controller, forming a 1oo2 (one-out-of-two) safety architecture.

The system is rated up to and including Safety Integrity Level 3 (SIL 3) and Performance Level e (PL e) functionality. Therefore, it suits high-integrity safety applications. The safety partner must be installed in the slot immediately to the right of the primary controller.

General Specifications

The 1756-L7SP serves as the redundant safety partner for L7S primary controllers.

• Manufacturer: Rockwell Automation.

• Brand: Allen-Bradley.

• Series: GuardLogix.

• Part Number/Catalog No.: 1756-L7SP.

• Module Type: Safety Partner Controller.

• Module Width: Two (2) slots.

• Module Location: Any chassis slot, but must be immediately to the right of the primary controller.

• User Memory: N/A (memory corresponds to the primary controller).

• I/O Memory: N/A.

• UPC: 10885630016495.

Compatible Primary Controllers

The 1756-L7SP works exclusively with specific GuardLogix primary controllers.

• 1756-L71S.

• 1756-L71SK.

• 1756-L72S.

• 1756-L72SK.

• 1756-L73S.

• 1756-L73SK.

Consequently, verify compatibility before ordering.

Compatible Energy Storage Modules

The 1756-L7SP works with specific energy storage modules.

• 1756-SPESMNSE: Capacitor energy storage module for the safety partner.

• 1756-SPESMNRM: Non-removable energy storage module.

Safety Architecture

The 1756-L7SP enables high-integrity safety control.

• Architecture Type: 1oo2 (one-out-of-two) safety architecture.

• Safety Rating: Up to and including SIL 3 (Safety Integrity Level 3).

• Performance Level: PL e (Performance Level e).

Thus, the system meets the highest levels of functional safety standards.

Power Consumption and Dissipation

The 1756-L7SP draws modest power from the backplane.

• Backplane Current (1.2 Volts DC): 5 milliamps.

• Backplane Current (5.1 Volts DC): 800 milliamps (801 mA specified).

• Power Dissipation: 2.5 Watts.

• Thermal Dissipation: 8.5 BTU per hour.

Isolation Voltage

The 1756-L7SP provides electrical isolation for safety.

• Isolation Voltage Rating: 30V continuous, basic insulation, USB port-to-system.

• Type Tested: 980V AC for 60 seconds.

Compatible Chassis

The 1756-L7SP fits in standard ControlLogix chassis.

• 1756-A4, 1756-A4K.

• 1756-A7, 1756-A7K.

• 1756-A10, 1756-A10K.

• 1756-A13, 1756-A13K.

• 1756-A17, 1756-A17K.

Compatible Standard Power Supplies

The 1756-L7SP works with standard ControlLogix power supplies.

• AC Power Supplies: 1756-PA50, 1756-PA72, 1756-PA72K, 1756-PA75, 1756-PA75K.

• DC Power Supplies: 1756-PB50, 1756-PB72, 1756-PB72K, 1756-PB75, 1756-PB75K.

Communication Options

The 1756-L7SP uses standard Rockwell Automation safety communication protocols.

• EtherNet/IP.

• DeviceNet.

• ControlNet.

Programming Languages

The 1756-L7SP (via the primary controller) supports standard safety programming languages.

• Relay Ladder Logic (RLL).

• Structured Text (ST).

• Sequential Function Chart (SFC).

Environmental Specifications

The 1756-L7SP withstands typical industrial conditions.

Temperature Ranges:

• Operating Temperature: 0 to 60°C (32 to 140°F).

• Storage Temperature: -40 to 85°C (-40 to 185°F).

Humidity:

• 5 to 95% (non-condensing).

Vibration:

• 2G at 10-500Hz.

Shock:

• 30G (operational shock rating).

Enclosure and Temperature Codes

The 1756-L7SP has specific ratings for hazardous locations.

• Enclosure: None (Open-Style).

• North America Temperature Code: T4A.

• ATEX Temperature Code: T4.

• IECEx Temperature Code: T4.

Key Features

The 1756-L7SP offers several advantages for high-integrity safety applications.

1oo2 Safety Architecture:
The primary controller and safety partner form a redundant safety pair. Therefore, a single fault does not cause loss of safety function.

SIL 3 and PL e Rating:
Rated up to SIL 3 and PL e. Consequently, it suits the highest-risk machinery and process safety applications.

No Dedicated Memory:
The safety partner's memory corresponds to the primary controller's memory. Hence, no separate user memory is required.

Dual-Slot Width:
Occupies two slots in the chassis. For this reason, plan chassis layout accordingly.

Immediate Slot Requirement:
Must be installed immediately to the right of the primary controller. Thus, proper physical placement is critical.

Wide Chassis Compatibility:
Works with all standard ControlLogix chassis from 4-slot to 17-slot versions. Hence, integration into existing systems is straightforward.

Multiple Communication Options:
Supports EtherNet/IP, DeviceNet, and ControlNet. Therefore, it connects to various safety I/O networks.

Standard Safety Programming:
Uses Relay Ladder Logic, Structured Text, and Sequential Function Chart. Consequently, safety logic is created with familiar tools.

Open-Style Enclosure:
Designed for installation in a protected control cabinet. For this reason, additional enclosure may be required in harsh environments.

Typical Applications

The 1756-L7SP suits high-integrity safety control applications.

• Emergency shutdown (ESD) systems requiring SIL 3.

• Burner management systems (BMS).

• High-speed press safety controls.

• Turbine and compressor safety systems.

• Machine safety applications requiring PL e.

Installation Guidelines

Install the 1756-L7SP in a ControlLogix chassis immediately to the right of the primary GuardLogix L7S controller. First, ensure the chassis power supply can provide the required 800 mA at 5.1V and 5 mA at 1.2V.

Insert the primary controller into its slot. Then, install the 1756-L7SP in the slot immediately to the right. The safety partner occupies two slots.

Connect energy storage modules as required. Use the 1756-SPESMNSE capacitor module or 1756-SPESMNRM non-removable module. Configure the safety partner using Studio 5000 software. The safety partner has no independent user memory; it mirrors the primary controller's safety memory.

What is in the Box

Please inspect all items upon delivery.

• Allen-Bradley 1756-L7SP GuardLogix safety partner controller.

• Installation instruction manual.

• Anti-static protective bag.

Frequently Asked Questions (FAQ)

1. What is the purpose of the 1756-L7SP safety partner controller?

The 1756-L7SP pairs with a primary GuardLogix L7S controller to form a 1oo2 redundant safety architecture. Therefore, it enables SIL 3 and PL e safety ratings.

2. Which primary controllers are compatible with the 1756-L7SP?

The 1756-L7SP is compatible with 1756-L71S, 1756-L71SK, 1756-L72S, 1756-L72SK, 1756-L73S, and 1756-L73SK primary controllers.

3. Where must the 1756-L7SP be installed in the chassis?

The 1756-L7SP must be installed in the slot immediately to the right of the primary controller. Consequently, proper physical placement is critical for safety system operation.

4. Does the 1756-L7SP have its own user memory?

No. The 1756-L7SP does not have dedicated user memory. Its memory corresponds to the memory of the primary controller.

5. How many slots does the 1756-L7SP occupy?

The 1756-L7SP has a module width of two (2) slots. Therefore, plan chassis slot allocation accordingly.