1768-L43S Allen-Bradley Compact GuardLogix Controller – 2 MB Standard Memory + 0.5 MB Safety Memory
The 1768-L43S is a Compact GuardLogix controller from Allen-Bradley / Rockwell Automation. It combines standard control and safety control in one module. This controller offers 2 MB standard memory and 0.5 MB safety memory. Moreover, it suits systems on EtherNet/IP or ControlNet. In addition, it supports rackless I/O to simplify installation. It also provides fully integrated motion and security controls. As a result, the platform stays economical and scalable for machine and process control.
Technical Specifications
| Brand | Allen-Bradley |
| Model / Catalog No. | 1768-L43S |
| Series | Compact GuardLogix |
| Module Type | Controller |
| Manufacturer | Rockwell Automation |
| Standard Memory | 2 MB |
| Safety Memory | 0.5 MB |
| Backplane Current | 1.4 A at 24 V |
| Power Consumption | 33.6 W |
| Power Dissipation | 7.5 W |
| Isolation Voltage | 30 V continuous |
| Operating Temperature | 0 to 60 °C |
| Storage Temperature | -4 to 85 °C |
| Relative Humidity | 5 to 95%, non-condensing |
| Vibration | 5 g at 10 to 500 Hz |
| Operating Shock | 30 g |
| Non-operating Shock | 50 g |
| Radiated RF Immunity | 10 V/m, 1 kHz sine-wave 80% AM, 80 to 2000 MHz |
| Dimensions (HxWxD) | 5.18 x 3.55 x 4.8 in |
| Weight | 15.9 oz |
| UPC | 10612598672186 |
Installation Guide
- Mount the module in a clean, dry panel.
- Use the 1768 backplane and follow the CompactLogix power budget.
- Keep within 0 to 60 °C operating temperature.
- Remove power before you connect or disconnect the serial cable.
- Check wiring and grounding before first power-up.
Setup and Maintenance Convenience
The 1768-L43S uses standard RSLogix 5000 / Studio 5000 tools. Rackless I/O keeps wiring short and simple. Because of this, maintenance is fast: check status LEDs, review fault codes, and swap the module without extra hardware. The compact size saves panel space.
Compatibility
- Works in Compact GuardLogix systems.
- Connects to EtherNet/IP and ControlNet networks.
- Pairs with 1768 series I/O and power modules.
- Supports integrated motion and safety I/O.
Diagnostics and Applications
The controller provides safety diagnostics and standard fault reporting. You can trace faults through status LEDs and software messages. Typical uses include machine safety control, material handling, packaging lines, food and beverage, and process skids. Therefore, it fits both new builds and legacy system support.
Why Buy From Oiltech Controls?
- 15+ years in industrial automation spare parts.
- Global shipment with FedEx, UPS, and DHL.
- Tested surplus and refurbished options.
- 12-month warranty on every unit.
- Technical verification before shipment.
- Support for obsolete control systems.
Packing List and Warranty
- 1 x 1768-L43S controller.
- Protective packaging and test report.
- 12-month warranty.
- Shipping by FedEx, UPS, or DHL.
FAQ
Q: What memory does the 1768-L43S have?
A: It has 2 MB standard memory and 0.5 MB safety memory.
Q: What networks does it support?
A: It supports EtherNet/IP and ControlNet.
Q: Is a warranty included?
A: Yes, a 12-month warranty covers every unit.
Q: How do you ship?
A: We ship by FedEx, UPS, and DHL.
Q: Can you support obsolete systems?
A: Yes. We test each unit before shipment.










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