The Allen-Bradley 1768-L43S Compact GuardLogix Safety Processor is a cornerstone of modern safety automation, engineered to deliver deterministic, high-integrity safety control in demanding manufacturing environments. This processor combines standard and safety control in a single, compact unit, eliminating the need for separate safety relays or controllers. It supports up to 256 safety I/O points and executes safety logic at speeds up to 1 ms per task, making it ideal for applications such as robotic cells, packaging lines, and conveyor systems where risk mitigation is paramount. The 1768-L43S integrates seamlessly with the Rockwell Automation Integrated Architecture, leveraging the Studio 5000 environment for programming and diagnostics. Below is a comprehensive technical specification table derived from industry-standard knowledge of the GuardLogix family.
| Parameter |
Specification |
| Product Type |
Compact GuardLogix Safety Controller / Processor |
| Model |
1768-L43S |
| Memory |
8 MB (standard and safety combined) |
| Safety Integrity Level |
SIL 3 (IEC 61508), PLe (ISO 13849-1) |
| Safety Certification |
TÜV Rheinland certified for functional safety |
| Maximum Safety I/O |
256 points (distributed via EtherNet/IP or ControlNet) |
| Communication Protocols |
EtherNet/IP, ControlNet, DeviceNet (via add-on modules) |
| Backplane Type |
Compact 1768 backplane (up to 8 modules) |
| Power Supply Voltage |
24 V DC (nominal, 18-32 V DC range) |
| Power Consumption |
12 W (typical) |
| Processor Speed |
533 MHz |
| Safety Task Execution Time |
1 ms (minimum) |
| Standard Task Execution Time |
0.5 ms (minimum) |
| Operating Temperature |
0°C to 60°C (32°F to 140°F) |
| Storage Temperature |
-40°C to 85°C (-40°F to 185°F) |
| Relative Humidity |
5% to 95% (non-condensing) |
| Vibration Resistance |
5 g at 10-500 Hz |
| Shock Resistance |
30 g (operational) |
| Safety Input Types Supported |
Standard, OSSD, dual-channel, and test pulse outputs |
| Safety Output Types Supported |
Standard, pulsed, and dual-channel with feedback monitoring |
| Programming Software |
Studio 5000 Logix Designer (v21 or later) |
| Programming Languages |
Ladder Diagram, Function Block Diagram, Structured Text |
| Diagnostic Capabilities |
Built-in web server, event logging, and fault reporting |
| Enclosure Type |
Open-style (suitable for panel mount) |
| Dimensions (H x W x D) |
140 x 50 x 100 mm (5.5 x 2.0 x 3.9 inches) |
| Weight |
0.3 kg (0.66 lbs) |
| Compliance |
CE, UL, C-UL, TÜV, RoHS |
| Warranty |
Standard 2-year (extended available) |
What Does Our Clients Say
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Laura Navas
Great product!
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Original and fast!
2020/02/22