1746-L543 SLC500

Overview of Allen-Bradley 1746-L543 SLC 5/04 Modular Processor

The Allen-Bradley 1746-L543 is a high-capacity SLC 5/04 modular processor from the SLC 500 family, featuring 64 KB battery-backed RAM and Flash EPROM backup memory. It supports up to 4096 discrete inputs, 4096 discrete outputs, and 480 analog I/O points. This processor includes a 9-pin RS-232 serial port and a Data Highway Plus (DH+) port for reliable network communications, making it suitable for medium to large industrial automation applications.

Key Features of 1746-L543

• User Memory: 64,000 words (64 KB) battery-backed RAM with optional flash EPROM for program backup.
• I/O Capacity: Supports up to 4096 inputs, 4096 outputs, and 480 analog points.
• Communication: Integrated RS-232 serial port and DH+ network port.
• Programming: Compatible with RSLogix 500 software supporting up to 107 programming instructions.
• Scan Times: 0.9 ms/K program scan time, 0.225 ms I/O scan time, and 0.37 µs bit execution time.
• Power Consumption: 1 A at 5 V DC and 125 mA at 24 V DC from the backplane.
• Status Indicators: LEDs for RUN, CPU FAULT, FORCED I/O, BATTERY LOW, RS-232, and DH+ network status.
• Operating Environment: 0 to 60°C with shock resistance of 30G and vibration tolerance of 2.5 G.
• Dimensions: Standard SLC 500 modular size, weighing approximately 0.5 kg.

Technical Specifications

Applications / Use Cases

The 1746-L543 processor is well-suited for distributed industrial control systems requiring high I/O density and reliable communications. It is ideal for manufacturing processes, packaging systems, and other industrial automation tasks where networked SLC 500 systems are employed for centralized and distributed control.