Allen-Bradley 1768-L45S CompactGuardLogix Controller, SIL 3

Product Overview

The 1768-L45S is a CompactGuardLogix controller from Allen-Bradley. It delivers advanced safety and standard control in one unit. This controller meets SIL 3 and PL e requirements. It uses a 1oo2 safety architecture for high reliability.

Standard memory is 3 MB. Safety memory is 1 MB. The controller supports up to thirty I/O modules. It can work with four local 1768 I/O modules. Expansion I/O includes up to thirty 1769 Compact I/O modules. Three expansion banks are possible.

Application Scenarios

This controller suits safety-critical automation tasks. Use it for machine safety functions like emergency stop and light curtains. It fits packaging, material handling, and robotic cells. The integrated safety reduces wiring and complexity.

It also handles standard logic for process control. The 1768-L45S is ideal for compact machine builds. You can combine safety and standard tasks in one chassis. This reduces overall system cost.

Technical Specifications

Power consumption is 50.4 watts. Power dissipation is 9.5 watts. Backplane current draw is 2.1 amps at 24 volts DC. Isolation voltage is 30 volts continuous. The enclosure type is open.

Operating temperature range is 0 to 60 degrees Celsius. Non-operating temperature is -40 to 85 degrees Celsius. Relative humidity is 5 to 95 percent. Operating vibration is 5g at 10 to 500 Hz. Operating shock is 30g. Non-operating shock is 50g.

Dimensions are 131.6 x 90 x 121.8 mm. Weight is 0.45 kg. It supports RS-232 communication at 38.4 Kbps. It uses a CompactFlash card for memory storage.

Installation & Maintenance Guide

Mount the controller on a panel or DIN rail. Allow 105 mm clearance above and below. Allow 90 mm clearance on each side. This ensures proper airflow for cooling.

Use climate control devices like heaters or fans if needed. Connect I/O modules in banks up to three. Install communication modules such as Ethernet/IP or ControlNet. The 1768-L45S supports both standard and safety protocols.

For programming, use standard IEC-61131-3 languages for standard tasks. Use relay ladder logic for safety tasks. Always follow safety application instructions.

Packing List

One Allen-Bradley 1768-L45S controller. One installation guide. One product documentation CD. No cables are included. We ship via Fedex, UPS, or DHL. The package dimensions are 8 x 8 x 5 inches.