Product Details
Product Overview
The 1747-L514 is a foundational modular processor within the Allen-Bradley SLC 500 family, specifically designated as an SLC 5/01 controller. Engineered for entry-level to mid-range industrial automation tasks, the 1747-L514 (PN: 1747-L514) provides a reliable execution environment for discrete and analog control. It resides exclusively in Slot 0 of an SLC 500 chassis and supports DH-485 communication for networked data exchange and programming.
Technical Specifications
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Manufacturer Allen-Bradley / Rockwell Automation
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Product Line SLC 500 Modular Hardware
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Model Number 1747-L514
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Processor Type SLC 5/01
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User Program Memory 4K Instructions (approx. 4,000 words)
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Memory Storage Capacitor-backed RAM (Internal)
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Non-Volatile Backup Compatible with 1747-M1 (1K) and 1747-M2 (4K) EEPROM modules
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EEPROM Adapter Socket 1747-M5
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Maximum I/O Capacity 960 Discrete I/O points
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Analog I/O Capacity 480 points
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Chassis Expansion Supports up to 3 interconnected chassis
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Max Module Count 30 local I/O modules
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Typical Program Scan Time 8 milliseconds per 1K
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I/O Scan Time 2.6 milliseconds
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Communication Interface DH-485 (RJ-45 port)
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Backplane Current (5V DC) 350 mA
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Backplane Current (24V DC) 105 mA
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Operating Temperature 32-140°F (0-60°C)
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Shipping Weight 0.75 lbs (0.34 kg)
Supported Instruction Sets
The 1747-L514 utilizes a robust instruction set suitable for standard logic and mathematical operations, including:
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Bit-level logic (XIC, XIO, OTE, etc.)
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Timer and Counter instructions (TON, TOF, RTO, CTU, CTD)
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Comparison operations (EQU, NEQ, LES, GRT)
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Basic Math (ADD, SUB, MUL, DIV)
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Data Handling (Move, Copy, Bit Shift)
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Program Flow Control (Jump, Subroutine, MCR)
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Sequencer instructions for automated step-based logic
Frequently Asked Questions
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How long will the capacitor-backed RAM hold the program without power?
The internal capacitor of the 1747-L514 is designed to retain memory for short periods (typically several days to a few weeks depending on ambient temperature). For long-term storage, a 1747-M1 or 1747-M2 EEPROM is required.
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Does the 1747-L514 support EtherNet/IP or ControlNet?
Native support is limited to DH-485. Connecting to Ethernet would require an external bridge such as a 1761-NET-ENI or upgrading to a higher-tier SLC processor like the 5/05.
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Can this processor be placed in any slot?
No, the 1747-L514 must always be installed in Slot 0 (the leftmost slot) of the primary local chassis.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Mastering Wire Identification in Industrial Automation: The Power of Ferrules and Cross-Ferruling
Proper wire labeling forms the cornerstone of reliable control system installation and long-term maintenance. In complex industrial automation environments, technicians terminate thousands of conductor ends inside control panels, marshalling racks, and field junction boxes. Ferrules serve as individual tube-shaped sleeve markers slipped onto conductors before final termination. While technicians historically relied on pre-printed individual letter rings, modern control panel builders utilize automated ferrule printing machines. These thermal-transfer printers generate durable, single-sleeve heat-shrink tags directly matching approved wiring schematics, significantly accelerating cabinet assembly workflows.
Understanding Marshalling Cabinets in Industrial Automation and Control Systems
Marshalling cabinets serve as the crucial connection hub between field instruments and centralized processing units. In large DCS and PLC control system architectures, hundreds of multipair field cables run from local junction boxes to the central instrument equipment room. The marshalling cabinet houses field terminal blocks, surge arresters, intrinsic safety isolation barriers, and interposing relays. By segregating field field-wiring terminations from sensitive processor hardware, engineers protect expensive controller backplanes from high-voltage transients. Consequently, this modular separation dramatically streamlines maintenance workflows and simplifies system expansion.
Essential Best Practices for PLC Wiring and Installation in Industrial Automation
Successful control system deployment begins with thoroughly reviewing manufacturer technical documentation. Controllers from major brands like Allen-Bradley, Siemens, and Schneider Electric feature unique terminal layouts. Engineers must verify voltage requirements before connecting power cables to prevent catastrophic equipment damage. Standard line connections require strict adherence to regional electrical codes and proper wire color coding. Furthermore, panel builders should always establish a robust low-impedance ground connection using at least 16-AWG copper conductor tied directly to the main plant grounding grid.