Description
Overview
Essential details:1747-L541/C SLC 5/04 processor Allen Bradley
The Allen-Bradley 1747-L541 is an SLC 5/04 processor that is part of the SLC 500 series, which also includes the 1747-L541, L542, and L543 controllers. It is a high-performance processor enhanced with faster communication and shorter program execution time. The SLC 5/04 comes with 16K, 32K, or 64K words of memory and it can control a maximum of 4096 input and output points. For communication, the 1747-L541 has a built-in DH+ channel that supports extended messaging capabilities and high-speed communication. It also has an RS-232 channel for supporting DF1 radio modem, DH-485, ASCII and Modbus RTU communications. For programming, it includes advanced math instructions and various additional instructions. It also supports remote I/O, DeviceNet pass-through, and indirect addressing.
The 1747-L541 has a typical Program Scan Time per Keyword of 0.9 milliseconds and a typical I/O scan time of 0.225 milliseconds. It requires a backplane current load of 1 Amp at 5 Volts DC and of 200 mA at 24 Volts DC. It has a 1-millisecond Selectable Timed Interrupt (STI) and 0.5 milliseconds Discrete Input Interrupt (DII). For program and data table storage, it uses a 1747-M13 flash-based memory device with a 64 KB memory. The SLC 5/04 includes a 3-position key switch on the front panel for selecting the Run, Remote, or Program modes. The 1747-L541 SLC 504 has RUN, FLT, BATT, FORCE, DH+, and RS-232 LED status indicators for troubleshooting and diagnostics. The SLC 500 series of processors has a simple, cost-effective design with a history of good installations in applications such as HVAC control, SCADA, and material handling.