Product Summary
The 1747-L542 processor from Rockwell Automation delivers robust control for the SLC 500 platform. This unit manages up to 4096 discrete inputs and outputs. It also handles 480 analog I/O points with a 32KB memory capacity. Engineers use this mid-range controller for complex automation tasks.
Expert Technical Evaluation & Performance Review
Processing Power and Memory Management
The 1747-L542 executes a program scan at just 0.9 ms/K. This speed allows rapid logic execution for time-sensitive applications. Its user memory holds 32,000 words for extensive programs. The system splits this into 28K words for logic and 4K for data storage. Battery-backed RAM preserves your program during power loss events. A Flash EPROM provides reliable backup memory for critical data.
Communication and Integration Capabilities
This module includes both an RS-232 port and a Data Highway Plus interface. The RS-232 port connects directly to HMI panels or SCADA systems. The DH+ network enables high-speed peer-to-peer messaging between controllers. You can use pass-through communication to link with PLC-5 or ControlLogix platforms. This feature simplifies data exchange across mixed-brand automation architectures.
Environmental and Physical Durability
The 1747-L542 operates reliably in ambient temperatures from 0 to 60 degrees Celsius. It withstands storage temperatures between -40 and 85 degrees Celsius. The unit tolerates non-condensing humidity levels from 5 to 95 percent. It resists vibration up to 2.5G at frequencies from 57 to 2000 Hertz. This processor also survives operating shocks of 30G without damage.
Installation and Chassis Requirements
You install this processor in slot zero of any SLC chassis. Compatible chassis include the 1746-A2, 1746-A7, 1746-A10, and 1746-A13 models. The unit draws 1 Amp at 5 Volts DC from the backplane. It also consumes 175 mA at 24 Volts DC for internal operations. The system supports up to three local chassis with a maximum of 30 slots.
Status Indicators and Operator Interface
Six front-panel LEDs provide immediate system status feedback. These indicators show Run, CPU Fault, Forced I/O, Battery Low, RS-232, and DH+ activity. A physical keyswitch lets operators change the processor mode securely. This design allows quick troubleshooting without opening the control cabinet.
Logistics & Standard Packaging Details
- One Allen-Bradley 1747-L542 SLC 5/04 Processor Module
- One 1747-BA Battery Backup Unit
- Product documentation and installation guide
- All units ship in anti-static protective packaging
We offer express delivery shipping via FedEx, UPS, and DHL for rapid deployment.
