Allen-Bradley 1747-L542 SER.C SLC 500 Processor Unit

The Allen‑Bradley 1747‑L542 Series C is an SLC 5/04 processor unit from the SLC 500™ PLC family, designed for mid‑range industrial automation applications. It offers robust performance, large I/O capacity, DH+ and RS‑232 communications, and nonvolatile flash memory, making it suitable for networked control systems requiring reliable and deterministic operation. Technical specifications: Manufacturer: Allen‑Bradley (Rockwell Automation) Manufacturer part number: 1747‑L542 Series: C Product family: SLC 500™ Processor type: SLC 5/04 CPU Input voltage: 5…24 VDC (backplane supplied) Backplane current draw: 1000 mA at 5 VDC Auxiliary current draw: 200 mA at 24 VDC User memory: 32 KB Memory type: Flash EEPROM and RAM Programming software: RSLogix 500 Instruction execution time: 0.9 ms per 1K instructions Maximum digital I/O: 8192 points Local chassis support: Up to 3 local chassis Maximum slots: 30 slots total (local expansion) Communication ports: DH+ (Data Highway Plus) and RS‑232 Communication protocols: DH+, DF1 via RS‑232 Battery backup: Lithium battery (for RAM retention) Key switch functions: RUN / REM / PROG Status indicators: CPU, RS‑232, DH+, FORCE, BAT, RUN Mounting: SLC 500 chassis slot mount Operating temperature range: 0…60 °C (32…140 °F) Storage temperature range: −40…85 °C (−40…185 °F) Operating humidity: 5…95% non‑condensing Industrial environment rating: Class I, Division 2 Certifications: UL, cUL, CE, CSA Application areas: Industrial automation, machine control, process control Country of manufacture: United States Please review pictures carefully and let us know if you have any questions!