Allen-Bradley 1768-L43S Compact GuardLogix Safety Processor – Compact GuardLogix Series
Imagine a high-speed automated production line — automotive body welding, pharmaceutical filling, or chemical blending — where a single undetected logic fault could trigger a catastrophic machine motion, injure an operator, or trigger a regulatory shutdown. Without a dedicated safety-rated processor, standard PLCs cannot provide the redundant, self-checking execution architecture required by IEC 61508 and ISO 13849. The Allen-Bradley 1768-L43S exists precisely to close that gap: it brings certified functional safety intelligence directly into the Compact GuardLogix platform, eliminating the need for a separate safety relay cabinet while maintaining full integration with your standard Logix control system.
Within the 1768 Compact GuardLogix family, the 1768-L43S occupies the mid-range tier — offering 3 MB of standard user memory and 1 MB of safety memory, making it the preferred choice for mid-complexity safety applications that demand SIL 2 / PLe performance without the footprint or cost of a full-size GuardLogix rack. Globally, the Compact GuardLogix platform is one of the most widely deployed safety PLC architectures in discrete and process manufacturing, trusted by OEMs and end-users across more than 100 countries.
Technical Specifications
- Catalog Number: 1768-L43S
- Series: Compact GuardLogix
- Manufacturer: Allen-Bradley / Rockwell Automation
- Processor Type: Dual-core Safety CPU (standard + safety partner)
- Standard User Memory: 3 MB
- Safety Memory: 1 MB
- Safety Integrity Level: SIL 2 (IEC 61508), PLe / Cat. 4 (ISO 13849)
- Communication Ports: USB (programming), EtherNet/IP via 1768-ENBT or 1768-EWEB adapter
- Backplane: 1768 CompactLogix backplane (up to 7 I/O modules)
- Programming Software: Studio 5000 Logix Designer (v21+)
- Safety Task Execution: Periodic safety task with configurable period
- Power Supply: 1768-PA3 or 1768-PB3 (sold separately)
- Operating Temperature: 0 °C to 60 °C
- Certifications: UL, CE, TÜV Rheinland, cULus
Key Features & Benefits
- Integrated Safety Architecture: Combines standard and safety control in a single chassis — no separate safety relay panel required, reducing wiring complexity and panel footprint.
- SIL 2 / PLe Certified: Meets the highest functional safety standards for machinery and process applications, supporting CE marking and global regulatory compliance.
- Dual-Core Safety Partner Design: The onboard safety partner continuously cross-checks the standard processor, providing the hardware fault tolerance (HFT=1) required for SIL 2 operation.
- Seamless Studio 5000 Integration: Program both standard and safety tasks within a single Logix Designer project — one software environment, one tag database, one network.
- Safety Locking & Signature: Safety task signature prevents unauthorized modification, supporting IEC 62443 cybersecurity best practices for industrial control systems.
- Scalable I/O Expansion: Supports up to 7 local 1768/1769 I/O modules plus distributed I/O over EtherNet/IP, DeviceNet, and ControlNet.
- Compact Form Factor: Fits into space-constrained panels where a full-size GuardLogix (1756-L7xS) would be impractical.
Industry & Equipment Applications
- Automotive Manufacturing: Robotic welding cells, press safety zones, AGV interlocking
- Pharmaceutical & Life Sciences: Filling lines, isolator barrier control, CIP/SIP safety interlocks
- Food & Beverage: High-speed packaging, conveyor guarding, palletizer safety
- Chemical & Oil/Gas: Emergency shutdown (ESD) logic, burner management system (BMS) support
- Material Handling: Warehouse automation, sorter safety, elevator/hoist control
- Machine Tool: CNC cell guarding, spindle safe-stop, two-hand control circuits
System Integration & Compatible Parts
- Power Supply: 1768-PA3 (120/240 VAC), 1768-PB3 (24 VDC)
- EtherNet/IP Adapter: 1768-ENBT, 1768-EWEB
- Safety I/O Modules: 1791DS series (distributed safety I/O over EtherNet/IP)
- Local I/O: 1768 and 1769 CompactLogix I/O modules
- Safety Drives: PowerFlex 527 / 755 with Safe Torque Off (STO)
- Safety Devices: Allen-Bradley Guardmaster safety relays, light curtains, safety mats via 1791DS I/O
- Programming Software: Studio 5000 Logix Designer v21 or later
Our Quality Assurance Process
At Konmask.com, every Allen-Bradley 1768-L43S unit undergoes a rigorous multi-stage verification process before shipment:
- Source Verification: Units are sourced exclusively from authorized distributors and verified OEM channels with full traceability documentation.
- Visual & Physical Inspection: Label authenticity, connector integrity, firmware version, and housing condition are checked against factory standards.
- Functional Pre-check: Where applicable, modules are bench-tested for power-on self-test (POST) completion and communication response.
- Secure Packaging: ESD-safe anti-static bags, foam-lined boxes, and moisture-barrier packaging protect units during international transit.
- Documentation Package: Each shipment includes a certificate of conformity, inspection report, and packing list.
How to Order
- Submit your inquiry via the “Request a Quote” button or email support@konmask.com.
- Provide your required quantity, delivery timeline, and destination country.
- Our technical team will confirm availability, lead time, and pricing within 24 business hours.
- Upon agreement, we issue a proforma invoice and arrange secure payment via T/T, L/C, or other agreed terms.
- Units are shipped with full tracking, insurance, and export documentation.
Why Choose Konmask.com?
- ✅ Specialist Focus: 100% dedicated to industrial automation components — PLC, DCS, drives, and safety systems.
- ✅ Global Reach: Serving buyers in 50+ countries with export-compliant documentation and multi-currency invoicing.
- ✅ Technical Support: Our team includes experienced automation engineers who can assist with compatibility, firmware, and integration questions.
- ✅ Fast Response: Quote turnaround within 24 hours; urgent inquiries handled same business day.
- ✅ Verified Stock: Real-time inventory checks with traceability back to authorized supply chains.
- ✅ Flexible Terms: MOQ of 1 unit; supports both spot purchases and blanket orders for MRO and project procurement.
Frequently Asked Questions
Q: What is the difference between the 1768-L43S and the 1768-L43?
A: The 1768-L43 is a standard CompactLogix processor without safety capability. The 1768-L43S adds an integrated safety partner processor, safety memory, and SIL 2 / PLe certification — enabling functional safety tasks that the standard L43 cannot execute.
Q: Can the 1768-L43S replace a 1756-L7xS GuardLogix processor?
A: They share the same Studio 5000 programming environment and safety architecture, but the 1768-L43S uses the 1768 backplane (max 7 local modules) versus the 1756 ControlLogix chassis. For applications requiring more local I/O slots or higher memory, the 1756-L7xS is recommended. For compact panels, the 1768-L43S is the more cost-effective choice.
Q: What Studio 5000 version is required?
A: Studio 5000 Logix Designer version 21.0 or later is required to program the 1768-L43S safety tasks. Always match the firmware revision of the processor to a compatible software version.
Q: Do you supply the power supply and EtherNet/IP adapter separately?
A: Yes. The 1768-PA3 / 1768-PB3 power supply and 1768-ENBT / 1768-EWEB adapter are available as separate line items. Please include them in your inquiry for a complete system quote.
Q: Is this product available for export to my country?
A: We ship to most countries worldwide. Some destinations may require export license review under EAR regulations. Contact us with your destination country and we will advise on compliance requirements.
Q: What warranty do you offer?
A: All units carry a minimum 90-day warranty against defects in materials and workmanship. Extended warranty options are available upon request.
© 2026 Konmask.com. All rights reserved.
Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
{
“@context”: “https://schema.org”,
“@graph”: [
{
“@type”: “Product”,
“name”: “Allen-Bradley 1768-L43S Compact GuardLogix Safety Processor”,
“description”: “Allen-Bradley 1768-L43S Compact GuardLogix Safety Processor. SIL 2 / PLe certified dual-core safety CPU with 3 MB standard memory and 1 MB safety memory. Ideal for mid-complexity functional safety applications in industrial automation.”,
“sku”: “1768-L43S”,
“mpn”: “1768-L43S”,
“brand”: {
“@type”: “Brand”,
“name”: “Allen-Bradley”
},
“manufacturer”: {
“@type”: “Organization”,
“name”: “Rockwell Automation”
},
“url”: “https://konmask.com/products/allen-bradley-1768-l43s-safety-processor-compact-guardlogix”,
“offers”: {
“@type”: “Offer”,
“url”: “https://konmask.com/products/allen-bradley-1768-l43s-safety-processor-compact-guardlogix”,
“priceCurrency”: “USD”,
“availability”: “https://schema.org/InStock”,
“seller”: {
“@type”: “Organization”,
“name”: “Konmask.com”
}
},
“additionalProperty”: [
{“@type”: “PropertyValue”, “name”: “Safety Integrity Level”, “value”: “SIL 2 (IEC 61508)”},
{“@type”: “PropertyValue”, “name”: “Performance Level”, “value”: “PLe / Cat. 4 (ISO 13849)”},
{“@type”: “PropertyValue”, “name”: “Standard User Memory”, “value”: “3 MB”},
{“@type”: “PropertyValue”, “name”: “Safety Memory”, “value”: “1 MB”},
{“@type”: “PropertyValue”, “name”: “Series”, “value”: “Compact GuardLogix”}
]
},
{
“@type”: “FAQPage”,
“mainEntity”: [
{
“@type”: “Question”,
“name”: “What is the difference between the 1768-L43S and the 1768-L43?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “The 1768-L43 is a standard CompactLogix processor without safety capability. The 1768-L43S adds an integrated safety partner processor, safety memory, and SIL 2 / PLe certification — enabling functional safety tasks that the standard L43 cannot execute.”
}
},
{
“@type”: “Question”,
“name”: “Can the 1768-L43S replace a 1756-L7xS GuardLogix processor?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “They share the same Studio 5000 programming environment and safety architecture, but the 1768-L43S uses the 1768 backplane (max 7 local modules) versus the 1756 ControlLogix chassis. For compact panels, the 1768-L43S is the more cost-effective choice.”
}
},
{
“@type”: “Question”,
“name”: “What Studio 5000 version is required?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “Studio 5000 Logix Designer version 21.0 or later is required to program the 1768-L43S safety tasks.”
}
},
{
“@type”: “Question”,
“name”: “Is this product available for export?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “We ship to most countries worldwide. Some destinations may require export license review under EAR regulations. Contact us with your destination country for compliance guidance.”
}
}
]
}
]
}
