1756-L61S Allen-Bradley SIL3 Processor

Allen-Bradley GuardLogix 1756-L61S Safety Controller

Product Status: Discontinued - The 1756-L61S is a GuardLogix safety controller from Allen-Bradley with 2MB standard memory + 1MB dedicated safety memory. This SIL3/PLe certified controller features integrated safety functions and requires a 1756-LSP safety partner module. Replacement model: 1756-L72S.

Core Features

• 2MB standard memory + 1MB safety memory
• SIL3/PLe safety certified
• 128,000 I/O capacity
• Integrated safety functions
• Requires 1756-LSP safety partner module
• Dual-channel safety monitoring
• Fault-tolerant architecture
• Secure mode switching

Processor Specifications

• Brand: Allen-Bradley / Rockwell Automation
• Series: GuardLogix L6
• Model: 1756-L61S
• User Memory: 2MB
• Safety Memory: 1MB
• I/O Memory: 478KB
• I/O Capacity: 128,000 points
• Power Consumption: 3.5W (11.9 BTU/hr)
• Current Draw: 1.2A @ 5.1VDC, 14mA @ 24VDC
• Isolation Voltage: 30V continuous

Environmental Ratings

• Operating Temperature: 0-60°C
• PCB Protection: Conformal coated
• Corrosion Resistance: Yes
• Enclosure Type: Open-style

System Notes

• Product status: Discontinued
• Replacement available: 1756-L72S
• Compatible with all 1756 ControlLogix chassis
• Requires 1756-LSP safety partner module

Package Includes

• 1x Allen-Bradley 1756-L61S GuardLogix safety controller
• 1x documentation

Technical Documentation

📥 Download Product Datasheet PDF

FAQ

1. What is the status of the 1756-L61S controller?

The 1756-L61S is discontinued. The recommended replacement is the 1756-L72S GuardLogix controller.

2. What safety certifications does this controller have?

It is certified for SIL3 and PLe with integrated safety functions and dual-channel monitoring.

3. How much memory does the 1756-L61S have?

It features 2MB standard memory, 1MB safety memory, and 478KB I/O memory.