1747-L541/C

Overview of Allen-Bradley 1747-L541 SLC 5/04 Processor Module Series C

The Allen-Bradley 1747-L541 is an SLC 5/04 processor within the SLC 500 family, designed for medium-to-large industrial control applications. It provides 16K words of user memory, supports up to 4096 discrete input and output points and 480 analog I/O points. The processor supports communication via Data Highway Plus (DH+) and RS-232 ports and features battery-backed RAM and flash backup memory for program and data retention.

Key Features of 1747-L541

• User memory of 16,000 words (12K for program/data and 4K for user data).
• Supports a maximum of 4096 inputs and 4096 outputs, plus 480 analog I/O points.
• Program scan time of approximately 0.9 milliseconds per K word of program.
• Communication ports: DH+, RS-232 with support for DF1, DH-485, Modbus RTU, and ASCII protocols.
• Battery-backed RAM for program retention and flash memory for backup.
• Selectable modes using 3-position keyswitch: Run, Remote, and Program modes.
• Supports Remote I/O passthru, DeviceNet passthru, and channel-to-channel communication.
• Compatible with up to 3 I/O chassis of 30 slots each.
• Standard operating temperature range of 0 to 60 °C (32 to 140 °F).
• Real-time clock/calendar, selectable time interrupt (STI) and discrete input interrupt (DII).

Technical Specifications

Applications / Use Cases

The 1747-L541 Series C processor is well-suited for medium-sized industrial control applications such as HVAC, SCADA systems, manufacturing lines, and process control systems. Its advanced communication and memory capabilities enable seamless integration and reliable operation in distributed control environments.