1747-L551| Allen-Bradley | SLC 5/05 Processor

Description

The 1747-L551 is a processor in the SLC 500 modular hardware style series, specifically part of the SLC 5/05 line. It offers advanced programmable logic control capabilities with support for complex ladder logic programming, up to 3840 I/O points, and multiple communication channels. The processor includes features like battery-backed RAM for data retention, a keyswitch for selecting operation modes, and compliance with international safety standards.

Features

• Advanced math functions: trigonometric, PID, exponential, floating-point.
• Indirect addressing and logical ASCII addressing.
• Flash PROM for firmware upgrades.
• Optional flash EPROM memory module.
• Keyswitch modes: RUN, REMote, PROGram (clear faults).
• Battery-backed RAM for data retention.
• UL listed, CE compliant, C-Tick marked.
• Supports multi-point list functionality (SLC 5/05 OS501 or later).

Technical Specifications

• Power Consumption:

  • 5V dc: 1.000 A
  • 24V dc: 0.000 A (Processor only)

• Total Power Supply Capacity:

  • For Chassis with this processor, the 1746-P4 power supply is recommended, providing 10 A at 5V dc and 2.88 A at 24V dc.

• Heat Dissipation:

  • Total Watts: 4.00 W

• Memory Module Compatibility:

  • 1747-M13: Supports up to 64 K of user-memory backup (Series C OS501 or later)

• Battery Backup:

  • Lithium battery provides backup for CMOS RAM.
  • Red BATTERY LOW status indicator alerts when the battery voltage falls below a threshold level.
  • Battery can be replaced while the processor is powered.

• Communication Channels:

  • DH-485, DF1, or ASCII Channel 0
  • DH-485 Channel 1

• Status Indicators:

  • RUN (Color: green): On (steady) - The processor is in the Run mode.
  • FLT (Color: red): Flashing (at power up) - The processor has not been configured.
  • FLT (Color: red): Flashing (during operation) - The processor detects a major error.
  • FLT (Color: red): On (steady) - A fatal error is present (no communication).
  • FLT (Color: red): Off - There are no errors.
  • Additional indicators: FORCE, DH+, RS232, BATT, RUN REM PROG

• Operating System:

  • Series C OS501 or later required for full feature set.

• Installation Instructions:

  • Always turn off power before removing the processor or inserting/removing the memory module.
  • Memory modules are mounted in carriers or have connectors that are keyed to prevent improper installation.
  • Handle memory modules by the ends of the carrier or edges of the plastic housing to avoid damage from skin oil, dirt, and electrostatic charges.