Allen-Bradley SLC 500 Modules – 1747-UIC

Name: Allen-Bradley SLC 500 Modules – 1747-UIC
Brand: Allen-Bradley

Model: 1747-UIC

Brand Allen-Bradley

Series SLC 500

Model 1747-UIC

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Product Details And Specifications

Allen-Bradley SLC 500 Series Technical Notes

The Allen-Bradley SLC 500 (Small Logic Controller 500) platform, identified by the 1747 and 1746 prefix families, is one of the most widely deployed programmable logic controller architectures in global heavy industry. Installed across petrochemical refineries, nuclear auxiliary systems, pulp and paper mills, automotive assembly lines, and water treatment facilities, the SLC 500 series established a benchmark for modular, rack-based control architecture throughout the 1990s and 2000s. Its fixed and modular chassis configurations, combined with a deterministic scan-cycle execution model, made it the preferred platform for process engineers requiring reliable, maintainable control infrastructure with a long service horizon.

The Evolution of SLC 500 Architecture

The SLC 500 platform was introduced by Allen-Bradley (now Rockwell Automation) in 1989 as a mid-range successor to the SLC 100 and SLC 150 fixed controllers. The architecture evolved through three distinct generations. The first generation (1989–1994) established the 1746 I/O module standard and the 1747-L20/L30/L40 fixed CPU family. The second generation (1994–2002) introduced the modular 1747-L511, L514, L524, L531, L532, L541, L542, L543, and L553 processors with expanded memory, online editing capability, and DH-485/DH+ network integration. The third generation (2002–2012) added the 1747-L551/L552/L553 series with EtherNet/IP bridging capability via the 1747-AENTR adapter, extending the platform's connectivity into modern Ethernet-based architectures.

Compatibility across generations is governed by chassis type (4-, 7-, 10-, and 13-slot 1746-A series), power supply rating (1746-P series), and firmware revision. Cross-generation I/O module compatibility is generally maintained within the 1746 I/O standard, but CPU firmware and RSLogix 500 software version alignment must be verified before substitution. The SLC 500 platform reached end-of-life (EOL) announcement in 2012, with Rockwell Automation recommending migration to the CompactLogix (1769) platform. However, the installed base remains extensive, and spare parts demand continues across all three generations.

SLC 500 Full Catalog & Functionalities (SKU List)

Processors / CPU Modules

1747-L511: SLC 5/01 CPU, 1K memory, DH-485 port, fixed I/O chassis only
1747-L514: SLC 5/01 CPU, 4K memory, DH-485 port, modular chassis
1747-L524: SLC 5/02 CPU, 4K memory, DH-485 port, online edit capable
1747-L531: SLC 5/03 CPU, 8K memory, DH-485 + RS-232 ports
1747-L532: SLC 5/03 CPU, 16K memory, DH-485 + RS-232 dual port
1747-L541: SLC 5/04 CPU, 16K memory, DH+ network port, high-speed comms
1747-L542: SLC 5/04 CPU, 32K memory, DH+ port, extended instruction set
1747-L543: SLC 5/04 CPU, 64K memory, DH+ port, full instruction set
1747-L551: SLC 5/05 CPU, 32K memory, EtherNet/IP + DH-485 ports
1747-L552: SLC 5/05 CPU, 64K memory, EtherNet/IP + DH-485 ports
1747-L553: SLC 5/05 CPU, 100K memory, EtherNet/IP + DH-485, max capacity

Communication & Interface Modules

1747-UIC: USB-to-DH-485 interface converter; connects PC running RSLogix 500 to SLC 500 DH-485 network without requiring a dedicated 1784-KT card; supports programming, monitoring, and firmware updates; compatible with all SLC 5/01 through 5/05 processors
1747-KE: RS-232/DH-485 interface module; mounts in SLC 500 chassis slot; bridges serial devices to DH-485 network
1747-SDN: DeviceNet scanner module; manages up to 64 DeviceNet nodes from SLC 500 backplane
1747-AENTR: EtherNet/IP adapter for SLC 500 remote I/O; extends 1746 I/O to EtherNet/IP network segments

Power Supply Modules

1746-P1: 120/240VAC input, 2A @ 5VDC output; suits 4- and 7-slot chassis
1746-P2: 120/240VAC input, 5A @ 5VDC output; suits 10- and 13-slot chassis
1746-P4: 24VDC input, 2A @ 5VDC output; DC-powered installations
1746-P7: 24VDC input, 10A @ 5VDC output; high-density I/O chassis

Quality Control for the SLC 500 Range

SLC 500 modules present specific test challenges due to their backplane-dependent communication architecture and DH-485/DH+ bus protocols. DriveKNMS applies a structured test protocol for each module category. CPU modules are bench-tested using a dedicated 1746-A4 chassis with a calibrated 1746-P2 power supply; firmware version is read and recorded, memory integrity is verified via RSLogix 500 forced I/O scan, and DH-485 port continuity is confirmed using a 1747-UIC loopback test. Communication modules (1747-KE, 1747-SDN, 1747-AENTR) are tested for backplane registration and network node acknowledgment. I/O modules are tested under rated load conditions with channel-by-channel verification. Power supplies are load-tested at 80% rated output for a minimum 30-minute burn-in period. All units that pass are tagged with a DriveKNMS QC label, test date, and technician ID before dispatch.

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