Allen Bradley 1756-L81ES GuardLogix 5580 Controller

The AB 1756-L81ES is a high-performance GuardLogix 5580 safety controller, engineered for integrated standard and safety control in demanding industrial applications. Featuring 3MB of standard memory and 1.5MB of safety memory, this modular controller provides real-time control, diagnostics, and safety logic in a single platform.

With an embedded 1 Gb Ethernet port supporting up to 100 EtherNet/IP devices and a USB port for programming and updates, the 1756-L81ES is ideal for large safety systems requiring high availability, flexibility, and performance. It supports applications certified up to SIL 2 and PL d, offering seamless integration with Studio 5000 and Logix-based architectures.

Technical Specifications

Model: 1756L81ES
Series: GuardLogix 5580
Type: Modular Safety Controller
Standard Memory: 3 MB
Safety Memory: 1.5 MB
Total EtherNet/IP Nodes: Up to 100
Display: 4-character alpha-numeric status display
Application: Safety control, machine protection, integrated standard + safety control

Electrical Specifications

Supply Voltage: Via ControlLogix chassis backplane
Power Dissipation: Approx. 5.5 W
Embedded Ethernet Port: 1 x 10/100/1000 Mbps
USB Port: 1 x USB 2.0 (for programming and firmware upgrades)
RS-232 Ports: None
Serial Communication: Not supported
Safety Features: Dual-core architecture with memory partitioning
Supported Protocols: EtherNet/IP, MODBUS, SERCOS
Battery: Not required – uses non-volatile memory with secure storage

Mechanical Specifications

Width: 34.55 mm
Height: 145.2 mm
Depth: 136.6 mm
Mounting Type: Rack-mounted (ControlLogix chassis)
Rail Mounting: Not supported
Wall Mounting: Not supported
Housing Style: Modular
Front Installation: Yes
Weight: Approx. 0.45 kg

Environmental Specifications

Operating Temperature: 0…60 °C
Storage Temperature: –40…85 °C
Relative Humidity: 5% to 95% non-condensing
Shock Resistance: 30 g, 11 ms (IEC 60068-2-27)
Vibration Resistance: 2 g, 10–500 Hz (IEC 60068-2-6)
Altitude Limit: Up to 2000 m
Pollution Degree: 2
Certifications: CE, cULus, RoHS, ATEX Zone 2 (with conditions)
SIL Rating: SIL 2 (IEC 61508)
Performance Level: PL d (EN ISO 13849-1)

Compliance & Communication

Network Protocols Supported: EtherNet/IP, MODBUS, SERCOS
Safety Certification: TÜV certified for use in SIL 2 / PL d applications
Programming Software: Studio 5000 Logix Designer
Display Interface: Built-in 4-character display for diagnostics
Memory Expansion: Not supported – fixed onboard memory
Chassis Compatibility: Standard 1756 ControlLogix chassis

Key Features & Benefits

✅ Integrated Safety + Standard Control – Run both types of logic in a single controller platform

✅ 3MB Standard + 1.5MB Safety Memory – High-capacity performance for complex safety applications

✅ Gigabit Ethernet Port – Connect up to 100 EtherNet/IP devices for scalable system expansion

✅ SIL 2 / PL d Certified – Ideal for mid- to high-risk machine safety control environments

✅ Studio 5000 Compatible – Simplifies deployment with unified configuration and diagnostics

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