Product Summary
The 1768-L45S integrates standard CompactLogix automation with certified safety up to SIL 3 and PL e. It uses a 1oo2 architecture for fail-safe operation. With 3 MB standard memory and 1 MB safety memory, this controller handles complex machine and process control while enforcing safety tasks via ladder logic.
Product Procurement & Buyer Guide
Procurement engineers must verify the 1768-L45S meets system safety requirements. This controller supports up to 30 I/O modules across 3 expansion banks. It accepts four local 1768 I/O modules and thirty 1769 Compact I/O modules. These specifications allow flexible system scaling without sacrificing safety integrity.
The 1768-L45S requires a 24 V DC backplane supply drawing 2.1 A. Its power dissipation is 9.5 W, with total consumption of 50.4 W. Ensure your panel power budget accommodates these figures. The controller mounts on a DIN rail or directly to a panel, needing 105 mm clearance above and below, plus 90 mm on each side.
Memory allocation influences application scope. The 3 MB standard memory stores IEC 61131-3 programs. The dedicated 1 MB safety memory runs only relay ladder logic with approved safety instructions. Choose this model if your project requires both high-speed standard control and certified safety functions in one compact unit.
Network integration options include Ethernet/IP, ControlNet, and DeviceNet standards and safety variants. The embedded RS-232 port communicates at up to 38.4 kbps. Two 1768 communication modules expand connectivity. This versatility simplifies system architecture and reduces procurement complexity.
Expert Technical Evaluation & Performance Review
The 1768-L45S operates reliably from 0 °C to 60 °C. Non-operating temperature ranges from -40 °C to 85 °C. Relative humidity tolerance spans 5% to 95%. These ratings suit both controlled factory floors and harsh environments.
Vibration resistance reaches 5 g at 10–500 Hz. Operating shock withstands 30 g, non-operating shock 50 g. These mechanical ratings confirm suitability for machinery subject to frequent starts and stops.
Isolation voltage is 30 V DC continuous with functional insulation. The RS-232 ports pass a 500 V DC dielectric test for 6 seconds. This protects communication lines during transient events and maintains signal integrity.
The 1oo2 safety architecture provides redundancy for critical functions. Achieving SIL 3 and PL e means the controller can detect a single fault and still operate safely. Engineers can certify entire machines using this single module without additional safety relays.
Memory modules use a standard 1784-CF128 CompactFlash card. This allows simple program backup and field upgrades. The controller weighs just 0.45 kg and measures 132 x 90 x 122 mm, saving valuable cabinet space.
Logistics & Standard Packaging Details
