Reference Manual · Publication 1746-RM003 · Rockwell Automation

SLC 500 Hardware Migration Reference Manual

This reference manual covers hardware migration from Allen-Bradley SLC 500 systems (Bulletins 1746, 1747) to CompactLogix 5370, CompactLogix 5380, Compact I/O (1769), and Compact 5000 I/O (5069) products. It provides controller replacement tables, I/O module replacement tables, wiring diagram comparisons, and conversion kit selection guides. The document is intended for engineers and technicians familiar with RSLogix 500 who are planning a migration of SLC 500 hardware.

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1746-RM003F-EN-E, Janu… Publication Revision
4, 7, 10, and 13-slot SLC Chassis Sizes Covered
1492-CM1746-Mxx series Conversion Modules
Studio 5000 Logix Desi… Required Software (Logix replacements)

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Specifications

Recommended CompactLogix 5370 Controller Replacements

1747-L511 / 1747-L514 (SLC 5/01) 1769-L24ER-QB1B, 750 KB, 16 DC In, 16 DC Out
1747-L524 (SLC 5/02) 1769-L24ER-QB1B, 750 KB, 16 DC In, 16 DC Out
1747-L531 / L532 / L533 (SLC 5/03) 1769-L24ER-QB1B, 750 KB, 16 DC In, 16 DC Out
1747-L541 / L542 (SLC 5/04 16K/32K) 1769-L24ER-QB1B, 750 KB, 16 DC In, 16 DC Out
1747-L543 (SLC 5/04 64K) 1769-L30ER, 1 MB, Dual Ethernet, SD Card
1747-L551 / L552 (SLC 5/05 16K/32K) 1769-L24ER-QB1B, 750 KB, 16 DC In, 16 DC Out
1747-L553 (SLC 5/05 64K) 1769-L30ER, 1 MB, Dual Ethernet, SD Card

Recommended CompactLogix 5380 Controller Replacements

1747-L511 through 1747-L542 / L551 / L552 5069-L306ER, 600 KB, 8 I/O, 16 nodes, Standard
1747-L543 (SLC 5/04 64K) 5069-L310ER, 1 MB, 8 I/O, 24 nodes, Standard
1747-L553 (SLC 5/05 64K) 5069-L310ER, 1 MB, 8 I/O, 24 nodes, Standard

CompactLogix 5380 Power Requirements

MOD power supply voltage 24V DC external source connected to MOD power terminal
Chassis required No chassis required; backplane connection at side of each module
End cap required 5069-ECR end cap required to cover open backplane side
SA bus separation 5069-FPD Field Potential Distributor used when two different SA operating voltages are present

SLC 500 to Compact 5000 I/O Conversion Chassis

1746-A4 to 1492-CH1746-4 4 slots; 235 mm length; up to 4 Compact 5000 I/O cards
1746-A7 to 1492-CH1746-7 7 slots; 339 mm length; up to 9 Compact 5000 I/O cards
1746-A10 to 1492-CH1746-10 10 slots; 454 mm length; up to 14 Compact 5000 I/O cards
1746-A13 to 1492-CH1746-13 13 slots; 559 mm length; up to 19 Compact 5000 I/O cards

Communication Protocols

Supported industrial networks and field buses for the products covered by this publication.

EtherNet/IP CompactLogix 5370 and 5380 controllers each provide two EtherNet/IP ports. 5380 supports DLR, Star, Linear, and Dual-IP topologies; up to 180 nodes depending on catalog number. Modbus RTU/ASCII Supported by CompactLogix 5380 controllers. DF1 Legacy DF1 protocol supported by CompactLogix 5380 controllers. DH-485 Legacy DH-485 protocol supported by CompactLogix 5380 controllers. Generic ASCII Supported by CompactLogix 5380 controllers and by the Compact 5000 5069-SERIAL module via RS232C, RS422, or RS485. DeviceNet Some CompactLogix 5370 controllers provide access to DeviceNet networks.

Document Contents

Full PDF covers the following topics in detail:

  • Preface
  • Chapter 1: Overview
  • Chapter 2: Replace an SLC 500 Controller
  • Chapter 3: Replace an SLC 500 I/O Module
  • Appendix A: Wiring Diagram Comparisons

Frequently Asked Questions

Which controllers are recommended to replace an SLC 5/01 or SLC 5/02?
The document recommends the 1769-L24ER-QB1B (CompactLogix 5370 L2, 750 KB, 16 DC inputs, 16 DC outputs) or the 5069-L306ER (CompactLogix 5380, 600 KB, 8 I/O, 16 nodes) as replacements for 1747-L511, 1747-L514, and 1747-L524 controllers.
What software is required when migrating to a CompactLogix 5370 or 5380 controller?
Studio 5000 Logix Designer version 21.00.00 or later is required for CompactLogix 5370 controllers (version 28.00.00 or later for catalog 1769-L19ER-BB1B), and version 29.00.00 or later for CompactLogix 5380 and Compact GuardLogix 5380 controllers. RSLogix 500 or RSLogix Micro version 12, or the free RSLogix Project Migrator tool, is also required to convert the SLC program.
What controller must be used when replacing SLC I/O with Compact I/O (1769 series)?
A CompactLogix 5370 controller must be used when replacing SLC I/O with Compact I/O modules.
What controllers are compatible with Compact 5000 I/O (5069 series) as SLC replacements?
When replacing SLC I/O with Compact 5000 I/O, a CompactLogix 5380, CompactLogix 5480, or ControlLogix 5580 controller must be used.
Can existing SLC field wiring be reused without rewiring when migrating to Compact 5000 I/O?
Yes. A conversion system using 1492-CM1746-Mxx conversion modules and 1492-CH1746-x conversion chassis allows existing SLC I/O field wiring to connect to Compact 5000 I/O modules without disturbing field wiring connections. I/O can be swapped one rack at a time, allowing old and new I/O networks to run simultaneously during migration.
What is the SA power bus, and when is the 5069-FPD module needed?
The CompactLogix 5380 I/O power system uses a common sensor actuator (SA) bus that shares a single power source across all attached I/O modules via the backplane. If field devices operate at two different voltages, the SA bus must be separated using a Field Potential Distributor Module such as the 5069-FPD.
Are there any SLC 1746 I/O modules that have no recommended Compact 5000 I/O replacement?
Yes. The Compact 5000 I/O replacement table lists no replacement for the 1746-IC16, 1746-IH16, 1746-IN16, 1746-ITV16, 1746-OAP12, 1746-OG16, 1746-OVP16, 1746-IO12DC, 1746-FIO4I, and 1746-FIO4V, among others. Some of these, such as the 1746-ITV16, 1746-OG16, and 1746-FIO4I, do have a Compact I/O (1769) replacement.

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