Overview
The Allen-Bradley 1747-L541 is a robust SLC 5/04 Central Processor Unit (CPU) from the industry-standard SLC 500 series. This controller module comes with 16 KB of memory and built-in communication interfaces including a 9-Pin RS-232 and Data Highway Plus (DH+). It is a high-performance processor enhanced with faster communication and shorter program execution time, making it ideal for medium-sized industrial automation systems requiring distributed I/O and reliable communications.
Key Features
- Capable of controlling 4096 Input points and 4096 Output points with an Analog I/O count of 480, 16K words of user memory, and an I/O scan time of 0.225 milliseconds
- Built-in DH+ channel that supports extended messaging capabilities and high-speed communication; RS-232 channel supports DF1 radio modem, DH-485, ASCII and Modbus RTU communications
- Built-in real-time clock/calendar
- 3-position key switch on the front panel for selecting Run, Remote, or Program modes
- RUN, FLT, BATT, FORCE, DH+, and RS-232 LED status indicators for troubleshooting and diagnostics
- Advanced math features such as trigonometry functions, PID, floating point, and compute instruction
Technical Specifications
Program Scan Time per Keyword: 0.9 milliseconds; I/O scan time: 0.225 milliseconds. Backplane current load of 1 Amp at 5 Volts DC and 200 mA at 24 Volts DC. 1-millisecond Selectable Timed Interrupt (STI) and 0.5 milliseconds Discrete Input Interrupt (DII). Minimum thermal dissipation is 4 Watts. Operates reliably from 0 to 60 degrees Celsius (32 to 140°F).
Typical Applications
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. The 1747-L541 is ideal for use in medium applications as this controller is capable of implementing distributed IO application with the use of a communication adapter on the CPU rack and communication scanner on the IO racks.
Compatibility & Replacements
Compatible With
- SLC 500 modular chassis (all standard sizes)
- 1747-M13 flash memory module (Series C OS401 or later) for up to 64K user memory expansion
- SLC 500 I/O modules and communication adapters
- Remote I/O and DeviceNet networks with appropriate adapters
Replaces / Drop-In Replacement For
The 1747-L541 is part of the SLC 5/04 product family. When replacing or upgrading, verify chassis compatibility and memory module compatibility with your system integrator before ordering.
Works With
- Allen-Bradley RSLogix 500 programming software
- Data Highway Plus (DH+) communication protocol
- DF1 protocol (full-duplex, half-duplex, and radio modem modes)
- DH-485 peer-to-peer communication
- Modbus RTU Master communication
- ASCII I/O for serial printers, weigh scales, and barcode readers
- Channel-to-channel passthrough (DH+ to DF1)
- Remote I/O passthrough and DeviceNet passthrough
